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1 A Critical Analysis of the Feasibility of Pure Strain -Actuated Giant Magnetostrictive Nano scale Memories P.G. Gowtham1, G.E. Rowlands1, and R.A. Buhrman1 1Cornell University, Ithaca, New York, 14853, USA Abstract Concepts for memories based on the manipulation of giant magnetostrictive nano magnets... | 2015-08-04 | Concepts for memories based on the manipulation of giant magnetostrictive
nanomagnets by stress pulses have garnered recent attention due to their
potential for ultra-low energy operation in the high storage density limit.
Here we discuss the feasibility of making such memories in light of the fact
that the Gilbert dam... | A Critical Analysis of the Feasibility of Pure Strain-Actuated Giant Magnetostrictive Nanoscale Memories | 1508.00629v2 |
arXiv:1610.04598v2 [cond-mat.mes-hall] 19 Jan 2017Nambu mechanics for stochastic magnetization dynamics Pascal Thibaudeaua,∗, Thomas Nusslea,b, Stam Nicolisb aCEA DAM/Le Ripault, BP 16, F-37260, Monts, FRANCE bCNRS-Laboratoire de Math´ ematiques et Physique Th´ eoriqu e (UMR 7350), F´ ed´ eration de Recherche ”Denis ... | 2016-10-14 | The Landau-Lifshitz-Gilbert (LLG) equation describes the dynamics of a damped
magnetization vector that can be understood as a generalization of Larmor spin
precession. The LLG equation cannot be deduced from the Hamiltonian framework,
by introducing a coupling to a usual bath, but requires the introduction of
addition... | Nambu mechanics for stochastic magnetization dynamics | 1610.04598v2 |
arXiv:1708.02008v2 [cond-mat.mes-hall] 31 Aug 2017Chiral damping, chiral gyromagnetism and current-induced torques in textured one-dimensional Rashba ferromagnets Frank Freimuth,∗Stefan Bl¨ ugel, and Yuriy Mokrousov Peter Gr¨ unberg Institut and Institute for Advanced Simula tion, Forschungszentrum J¨ ulich and JARA,... | 2017-08-07 | We investigate Gilbert damping, spectroscopic gyromagnetic ratio and
current-induced torques in the one-dimensional Rashba model with an additional
noncollinear magnetic exchange field. We find that the Gilbert damping differs
between left-handed and right-handed N\'eel-type magnetic domain walls due to
the combination... | Chiral damping, chiral gyromagnetism and current-induced torques in textured one-dimensional Rashba ferromagnets | 1708.02008v2 |
arXiv:2005.12756v1 [math.AP] 24 May 2020A TRANSMISSION PROBLEM FOR THE TIMOSHENKO SYSTEM WITH ONE LO CAL KELVIN-VOIGT DAMPING AND NON-SMOOTH COEFFICIENT AT THE INT ERFACE MOUHAMMAD GHADER AND ALI WEHBE LEBANESE UNIVERSITY, FACULTY OF SCIENCES 1, KHAWARIZMI LAB ORATORY OF MATHEMATICS AND APPLICATIONS-KALMA, HADATH-BEI... | 2020-05-24 | In this paper, we study the indirect stability of Timoshenko system with
local or global Kelvin-Voigt damping, under fully Dirichlet or mixed boundary
conditions. Unlike the results of H. L. Zhao, K. S. Liu, and C. G. Zhang and of
X. Tian and Q. Zhang, in this paper, we consider the Timoshenko system with
only one loca... | A transmission problem for the Timoshenko system with one local Kelvin-Voigt damping and non-smooth coefficient at the interface | 2005.12756v1 |
arXiv:2210.03865v1 [math.AP] 8 Oct 2022RECOVER ALL COEFFICIENTS IN SECOND-ORDER HYPERBOLIC EQUATIONS FROM FINITE SETS OF BOUNDARY MEASUREMENTS SHITAO LIU, ANTONIO PIERROTTET AND SCOTT SCRUGGS Abstract. We consider the inverse hyperbolic problem of recovering all spatial dependent coefficients, which are the wave speed,... | 2022-10-08 | We consider the inverse hyperbolic problem of recovering all spatial
dependent coefficients, which are the wave speed, the damping coefficient,
potential coefficient and gradient coefficient, in a second-order hyperbolic
equation defined on an open bounded domain with smooth enough boundary. We show
that by appropriate... | Recover all Coefficients in Second-Order Hyperbolic Equations from Finite Sets of Boundary Measurements | 2210.03865v1 |
Room-Temperature Intrinsic and Extrinsic Damping in Polycrystalline Fe Thin Films Shuang Wu,1David A. Smith,1Prabandha Nakarmi,2Anish Rai,2Michael Clavel,3Mantu K. Hudait,3Jing Zhao,4F. Marc Michel,4Claudia Mewes,2Tim Mewes,2and Satoru Emori1 1Department of Physics, Virginia Polytechnic Institute and State University, ... | 2021-09-08 | We examine room-temperature magnetic relaxation in polycrystalline Fe films.
Out-of-plane ferromagnetic resonance (FMR) measurements reveal Gilbert damping
parameters of $\approx$ 0.0024 for Fe films with thicknesses of 4-25 nm,
regardless of their microstructural properties. The remarkable invariance with
film microst... | Room-Temperature Intrinsic and Extrinsic Damping in Polycrystalline Fe Thin Films | 2109.03684v2 |
arXiv:0808.1373v1 [cond-mat.mes-hall] 9 Aug 2008Gilbert Damping in Conducting Ferromagnets I: Kohn-Sham Theory and Atomic-Scale Inhomogeneity Ion Garate and Allan MacDonald Department of Physics, The University of Texas at Austin, Au stin TX 78712 (Dated: October 27, 2018) We derive an approximate expression for the ... | 2008-08-09 | We derive an approximate expression for the Gilbert damping coefficient
\alpha_G of itinerant electron ferromagnets which is based on their description
in terms of spin-density-functional-theory (SDFT) and Kohn-Sham quasiparticle
orbitals. We argue for an expression in which the coupling of magnetization
fluctuations t... | Gilbert Damping in Conducting Ferromagnets I: Kohn-Sham Theory and Atomic-Scale Inhomogeneity | 0808.1373v1 |
Giant anisotropy of Gilbert damping in epitaxial CoFe lms Yi Li,1, 2Fanlong Zeng,3Steven S.-L. Zhang,2Hyeondeok Shin,4Hilal Saglam,2, 5Vedat Karakas,2, 6Ozhan Ozatay,2, 6John E. Pearson,2Olle G. Heinonen,2Yizheng Wu,3, 7,Axel Ho mann,2,yand Wei Zhang1, 2,z 1Department of Physics, Oakland University, Rochester, MI 483... | 2019-01-07 | Tailoring Gilbert damping of metallic ferromagnetic thin films is one of the
central interests in spintronics applications. Here we report a giant Gilbert
damping anisotropy in epitaxial Co$_{50}$Fe$_{50}$ thin film with a
maximum-minimum damping ratio of 400 \%, determined by broadband spin-torque as
well as inductive... | Giant anisotropy of Gilbert damping in epitaxial CoFe films | 1901.01941v1 |
arXiv:1909.08004v1 [cond-mat.supr-con] 17 Sep 2019Microwave induced tunable subharmonic steps in superconductor-ferromagnet-superconductor Josephson j unction M. Nashaat,1,2,∗Yu. M. Shukrinov,2,3,†A. Irie,4A.Y. Ellithi,1and Th. M. El Sherbini1 1Department of Physics, Cairo University, Cairo, 12613, Egy pt 2BLTP, JINR... | 2019-09-17 | We investigate the coupling between ferromagnet and superconducting phase
dynamics in superconductor-ferromagnet-superconductor Josephson junction. The
current-voltage characteristics of the junction demonstrate a pattern of
subharmonic current steps which forms a devil's staircase structure. We show
that a width of th... | Microwave induced tunable subharmonic steps in superconductor-ferromagnet-superconductor Josephson junction | 1909.08004v1 |
arXiv:1001.4576v1 [cond-mat.mtrl-sci] 26 Jan 2010Effect of spin-conserving scattering on Gilbert damping in f erromagnetic semiconductors K. Shen,1G. Tatara,2and M. W. Wu1,∗ 1Hefei National Laboratory for Physical Sciences at Microsc ale and Department of Physics, University of Science and Technology of China, Hefei, ... | 2010-01-26 | The Gilbert damping in ferromagnetic semiconductors is theoretically
investigated based on the $s$-$d$ model. In contrast to the situation in
metals, all the spin-conserving scattering in ferromagnetic semiconductors
supplies an additional spin relaxation channel due to the momentum dependent
effective magnetic field o... | Effect of spin-conserving scattering on Gilbert damping in ferromagnetic semiconductors | 1001.4576v1 |
arXiv:0807.5009v1 [cond-mat.mes-hall] 31 Jul 2008Scattering Theory of Gilbert Damping Arne Brataas,1,∗Yaroslav Tserkovnyak,2and Gerrit E. W. Bauer3 1Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim, Norway 2Department of Physics and Astronomy, University of Califor nia, Los Ange... | 2008-07-31 | The magnetization dynamics of a single domain ferromagnet in contact with a
thermal bath is studied by scattering theory. We recover the
Landau-Liftshitz-Gilbert equation and express the effective fields and Gilbert
damping tensor in terms of the scattering matrix. Dissipation of magnetic
energy equals energy current p... | Scattering Theory of Gilbert Damping | 0807.5009v1 |
arXiv:1307.7427v1 [cond-mat.mes-hall] 29 Jul 20131 Theoretical Study of Spin-Torque Oscillator with Perpendicularly Magnetized Free Layer Tomohiro Taniguchi, Hiroko Arai, Hitoshi Kubota, and Hiros hi Imamura∗ Spintronics Research Center, AIST, Tsukuba, Ibaraki 305-8 568, Japan Abstract—The magnetization dynamics of s... | 2013-07-29 | The magnetization dynamics of spin torque oscillator (STO) consisting of a
perpendicularly magnetized free layer and an in-plane magnetized pinned layer
was studied by solving the Landau-Lifshitz-Gilbert equation. We derived the
analytical formula of the relation between the current and the oscillation
frequency of the... | Theoretical Study of Spin-Torque Oscillator with Perpendicularly Magnetized Free Layer | 1307.7427v1 |
arXiv:2204.10596v2 [cond-mat.mtrl-sci] 19 Jul 2022A short-circuited coplanar waveguide for low-temperature single-port ferromagnetic resonance spectroscopy set-up to probe the magnetic proper ties of ferromagnetic thin films Sayani Pal, Soumik Aon, Subhadip Manna and Chiranjib Mitra∗ Indian Institute of Science Educat... | 2022-04-22 | A coplanar waveguide shorted in one end is proposed, designed, and
implemented successfully to measure the properties of magnetic thin films as a
part of the vector network analyzer ferromagnetic resonance (VNA-FMR)
spectroscopy set-up. Its simple structure, potential applications and easy
installation inside the cryos... | A short-circuited coplanar waveguide for low-temperature single-port ferromagnetic resonance spectroscopy set-up to probe the magnetic properties of ferromagnetic thin films | 2204.10596v2 |
arXiv:0812.0832v1 [cond-mat.mtrl-sci] 3 Dec 2008Observationofferromagnetic resonance instrontium ruthe nate (SrRuO 3) M.C. Langner,1,2C.L.S. Kantner,1,2Y.H. Chu,3L.M. Martin,2P. Yu,1R. Ramesh,1,4and J. Orenstein1,2 1Department of Physics, University of California, Berkeley , CA 94720 2Materials Science Division, Lawr... | 2008-12-03 | We report the observation of ferromagnetic resonance (FMR) in SrRuO3 using
the time-resolved magneto-optical Kerr effect. The FMR oscillations in the
time-domain appear in response to a sudden, optically induced change in the
direction of easy-axis anistropy. The high FMR frequency, 250 GHz, and large
Gilbert damping p... | Observation of ferromagnetic resonance in strontium ruthenate (SrRuO3) | 0812.0832v1 |
arXiv:2102.01137v2 [math.AP] 20 Jan 2022BLOW-UP AND LIFESPAN ESTIMATES FOR A DAMPED WAVE EQUATION IN THE EINSTEIN-DE SITTER SPACETIME WITH NONLINEARITY OF DERIVATIVE TYPE MAKRAM HAMOUDA1, MOHAMED ALI HAMZA1AND ALESSANDRO PALMIERI2,3 Abstract. Inthis article, weinvestigatethe blow-upforlocalsolutionstoasem ilinear wav... | 2021-02-01 | In this article, we investigate the blow-up for local solutions to a
semilinear wave equation in the generalized Einstein - de Sitter spacetime with
nonlinearity of derivative type. More precisely, we consider a semilinear
damped wave equation with a time-dependent and not summable speed of
propagation and with a time-... | Blow-up and lifespan estimates for a damped wave equation in the Einstein-de Sitter spacetime with nonlinearity of derivative type | 2102.01137v2 |
In
uence of non-local damping on magnon properties of ferromagnets Zhiwei Lu,1,I. P. Miranda,2,Simon Streib,2Manuel Pereiro,2Erik Sj oqvist,2 Olle Eriksson,2, 3Anders Bergman,2Danny Thonig,3, 2and Anna Delin1, 4 1Department of Applied Physics, School of Engineering Sciences, KTH Royal Institute of Technology, AlbaNov... | 2022-11-24 | We study the influence of non-local damping on magnon properties of Fe, Co,
Ni and Fe$_{1-x}$Co$_{x}$ ($x=30\%,50\%$) alloys. The Gilbert damping parameter
is typically considered as a local scalar both in experiment and in theoretical
modelling. However, recent works have revealed that Gilbert damping is a
non-local q... | Influence of non-local damping on magnon properties of ferromagnets | 2211.13486v1 |
Turbulence damping as a measure of the
ow dimensionality M. Shats,D. Byrne, and H. Xia Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia (Dated: October 23, 2018) The dimensionality of turbulence in
uid layers determines their properties. We study electro- m... | 2010-12-07 | The dimensionality of turbulence in fluid layers determines their properties.
We study electromagnetically driven flows in finite depth fluid layers and show
that eddy viscosity, which appears as a result of three-dimensional motions,
leads to increased bottom damping. The anomaly coefficient, which characterizes
the d... | Turbulence damping as a measure of the flow dimensionality | 1012.1371v1 |
Spin Pumping into Anisotropic Dirac Electrons Takumi Funato1;2, Takeo Kato3, Mamoru Matsuo2;4;5;6 1Center for Spintronics Research Network, Keio University, Yokohama 223-8522, Japan 2Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China. 3Institute for Solid State P... | 2022-06-10 | We study spin pumping into an anisotropic Dirac electron system induced by
microwave irradiation to an adjacent ferromagnetic insulator theoretically. We
formulate the Gilbert damping enhancement due to the spin current flowing into
the Dirac electron system using second-order perturbation with respect to the
interfaci... | Spin Pumping into Anisotropic Dirac Electrons | 2206.04899v1 |
1 Structural Phase Dependent Giant Interfacial Spin Transparency in W/CoFeB Thin Film Heterostructure Surya Narayan Panda, Sudip Majumder, Arpan Bhattacharyya, Soma Dutta, Samiran Choudhury and Anjan Barman* Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic... | 2020-09-29 | Pure spin current has transfigured the energy-efficient spintronic devices
and it has the salient characteristic of transport of the spin angular
momentum. Spin pumping is a potent method to generate pure spin current and for
its increased efficiency high effective spin-mixing conductance (Geff) and
interfacial spin tr... | Structural Phase Dependent Giant Interfacial Spin Transparency in W/CoFeB Thin Film Heterostructure | 2009.14143v1 |
arXiv:1107.0753v2 [cond-mat.mes-hall] 16 Sep 2011Applied Physics Express Minimizationof theSwitchingTime of aSyntheticFreeLayer inThermallyAssistedSpin TorqueSwitching TomohiroTaniguchiandHiroshi Imamura Nanosystem Research Institute, AIST, 1-1-1 Umezono, Tsuku ba 305-8568, Japan Wetheoreticallystudiedthethermallyass... | 2011-07-04 | We theoretically studied the thermally assisted spin torque switching of a
synthetic free layer and showed that the switching time is minimized if the
condition H_J=|H_s|/(2 alpha) is satisfied, where H_J, H_s and alpha are the
coupling field of two ferromagnetic layers, the amplitude of the spin torque,
and the Gilber... | Minimization of the Switching Time of a Synthetic Free Layer in Thermally Assisted Spin Torque Switching | 1107.0753v2 |
Realization of the thermal equilibrium in inhomogeneous magnetic systems by the Landau-Lifshitz-Gilbert equation with stochastic noise, and its dynamical aspects Masamichi Nishino1and Seiji Miyashita2;3 1Computational Materials Science Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan ... | 2015-07-11 | It is crucially important to investigate effects of temperature on magnetic
properties such as critical phenomena, nucleation, pinning, domain wall motion,
coercivity, etc. The Landau-Lifshitz-Gilbert (LLG) equation has been applied
extensively to study dynamics of magnetic properties. Approaches of Langevin
noises hav... | Realization of the thermal equilibrium in inhomogeneous magnetic systems by the Landau-Lifshitz-Gilbert equation with stochastic noise, and its dynamical aspects | 1507.03075v1 |
arXiv:0802.4455v3 [nlin.CD] 30 Aug 2008Heat conduction and Fourier’s law in a class of many particle dispersing billiards Pierre Gaspard †, Thomas Gilbert ‡ Center for Nonlinear Phenomena and Complex Systems, Universit´ e Libre de Bruxelles, C. P. 231, Campus Plaine, B-1050 Brussels, Belgium Abstract. We consider the... | 2008-02-29 | We consider the motion of many confined billiard balls in interaction and
discuss their transport and chaotic properties. In spite of the absence of mass
transport, due to confinement, energy transport can take place through binary
collisions between neighbouring particles. We explore the conditions under
which relaxat... | Heat conduction and Fourier's law in a class of many particle dispersing billiards | 0802.4455v3 |
Spin Pumping from Permalloy into Uncompensated Antiferromagnetic Co doped Zinc Oxide Martin Buchner,1,Julia Lumetzberger,1Verena Ney,1Tadd aus Scha ers,1,yNi eli Da e,2and Andreas Ney1 1Institut f ur Halbleiter- und Festk orperphysik, Johannes Kepler Universit at, Altenberger Str. 69, 4040 Linz, Austria 2Swiss Ligh... | 2019-09-10 | Heterostructures of Co-doped ZnO and Permalloy were investigated for their
static and dynamic magnetic interaction. The highly Co-doped ZnO is
paramagentic at room temperature and becomes an uncompensated antiferromagnet
at low temperatures, showing a narrowly opened hysteresis and a vertical
exchange bias shift even i... | Spin Pumping from Permalloy into Uncompensated Antiferromagnetic Co doped Zinc Oxide | 1909.04362v3 |
Measurement of Gilbert damping paramete rs in nanoscale CPP-GMR spin-valves Neil Smith, Matthew J. Carey, and Jeffrey R. Childress. San Jose Research Center Hitachi Global Storage Technologies San Jose, CA 95120 abstract ⎯ In-situ, device level measurement of thermal mag-noise spectral linewidths in 60nm di... | 2010-02-17 | In-situ, device level measurement of thermal mag-noise spectral linewidths in
60nm diameter CPP-GMR spin-valve stacks of IrMn/ref/Cu/free, with reference and
free layer of similar CoFe/CoFeGe alloy, are used to simultaneously determine
the intrinsic Gilbert damping for both magnetic layers. It is shown that
careful ali... | Measurement of Gilbert damping parameters in nanoscale CPP-GMR spin-valves | 1002.3295v1 |
Choice of Damping Coefficient in Langevin Dynamics Robert D. SkeelandCarsten Hartmanny Abstract. This article considers the application of Langevin dynamics to sampling and investigates how to choose the damping parameter in Langevin dynamics for the purpose of maximizing thoroughness of sampling. Also, it considers the... | 2021-06-22 | This article considers the application of Langevin dynamics to sampling and
investigates how to choose the damping parameter in Langevin dynamics for the
purpose of maximizing thoroughness of sampling. Also, it considers the
computation of measures of sampling thoroughness. | Choice of Damping Coefficient in Langevin Dynamics | 2106.11597v1 |
The destabilizing e ect of external damping: Singular
utter boundary for the P
uger column with vanishing external dissipation Mirko Tommasinia, Oleg N. Kirillova,b, Diego Misseronia, Davide Bigonia aUniversit a di Trento, DICAM, via Mesiano 77, I-38123 Trento, Italy bRussian Academy of Sciences, Steklov Mathematica... | 2016-10-01 | Elastic structures loaded by nonconservative positional forces are prone to
instabilities induced by dissipation: it is well-known in fact that internal
viscous damping destabilizes the marginally stable Ziegler's pendulum and
Pfluger column (of which the Beck's column is a special case), two structures
loaded by a tan... | The destabilizing effect of external damping: Singular flutter boundary for the Pfluger column with vanishing external dissipation | 1611.03886v1 |
Page 1 of 15 Electrically tunable Gilbert damping in van der Waals heterostructures of two- dimensional ferromagnetic meta ls and ferroelectrics Liang Qiu,1 Zequan Wang,1 Xiao-Sheng Ni,1 Dao-Xin Yao1,2 and Yusheng Hou 1,* AFFILIATIONS 1 Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, St... | 2023-03-07 | Tuning the Gilbert damping of ferromagnetic (FM) metals via a nonvolatile way
is of importance to exploit and design next-generation novel spintronic
devices. Through systematical first-principles calculations, we study the
magnetic properties of the van der Waals heterostructure of two-dimensional FM
metal CrTe2 and f... | Electrically tunable Gilbert damping in van der Waals heterostructures of two-dimensional ferromagnetic metals and ferroelectrics | 2303.03852v1 |
Journal of the Physical Society of Japan LETTERS Current-Driven Motion of Magnetic Domain Wall with Many Bloch Lines Junichi Iwasaki1and Naoto Nagaosa1;2y 1Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan 2RIKEN Center for Emergent Matter Science (CEMS),Wako, Saitama 351-0198, Japan The curren... | 2015-06-02 | The current-driven motion of a domain wall (DW) in a ferromagnet with many
Bloch lines (BLs) via the spin transfer torque is studied theoretically. It is
found that the motion of BLs changes the current-velocity ($j$-$v$)
characteristic dramatically. Especially, the critical current density to
overcome the pinning forc... | Current-Driven Motion of Magnetic Domain Wall with Many Bloch Lines | 1506.00723v1 |
Dynamical Majorana Ising spin response in a topological superconductor-magnet hybrid by microwave irradiation Yuya Ominato,1, 2Ai Yamakage,3and Mamoru Matsuo1, 4, 5, 6 1Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China. 2Waseda Institute for Advanced Study, Wase... | 2023-08-11 | We study a dynamical spin response of surface Majorana modes in a topological
superconductor-magnet hybrid under microwave irradiation. We find a method to
toggle between dissipative and non-dissipative Majorana Ising spin dynamics by
adjusting the external magnetic field angle and the microwave frequency. This
reflect... | Dynamical Majorana Ising spin response in a topological superconductor-magnet hybrid by microwave irradiation | 2308.05955v2 |
arXiv:1604.07552v1 [cond-mat.mtrl-sci] 26 Apr 2016First principles studies of the Gilbert damping and exchang e interactions for half-metallic Heuslers alloys Jonathan Chico,1,∗Samara Keshavarz,1Yaroslav Kvashnin,1Manuel Pereiro,1Igor Di Marco,1Corina Etz,2Olle Eriksson,1Anders Bergman,1and Lars Bergqvist3,4 1Departm... | 2016-04-26 | Heusler alloys have been intensively studied due to the wide variety of
properties that they exhibit. One of these properties is of particular interest
for technological applications, i.e. the fact that some Heusler alloys are
half-metallic. In the following, a systematic study of the magnetic properties
of three diffe... | First principles studies of the Gilbert damping and exchange interactions for half-metallic Heuslers alloys | 1604.07552v1 |
Fermi Level Controlled Ultrafast Demagnetization Mechanism in Half -Metallic Heusler Alloy Santanu Pan1, Takeshi Seki2,3, Koki Takanashi2,3,4, and Anjan Barman1,* 1Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata ... | 2020-01-17 | The electronic band structure-controlled ultrafast demagnetization mechanism
in Co2FexMn1-xSi Heusler alloy is underpinned by systematic variation of
composition. We find the spin-flip scattering rate controlled by spin density
of states at Fermi level is responsible for non-monotonic variation of
ultrafast demagnetiza... | Fermi Level Controlled Ultrafast Demagnetization Mechanism in Half-Metallic Heusler Alloy | 2001.06217v1 |
1 Inverse Spin Hall Effect in nanometer -thick YIG/Pt system O. d’Allivy Kelly1, A. Anane1*, R. Bernard1, J. Ben Youssef2, C. Hahn3, A-H. Molpeceres1, C. Carrétéro1, E. Jacquet1, C. Deranlot1, P. Bortolotti1, R. Lebourgois4, J-C. Mage1, G. de Loubens3, O. Klein3, V. Cros1 and A. Fert1 1Unité Mixte de Physique CNR... | 2013-08-01 | High quality nanometer-thick (20 nm, 7 nm and 4 nm) epitaxial YIG films have
been grown on GGG substrates using pulsed laser deposition. The Gilbert damping
coefficient for the 20 nm thick films is 2.3 x 10-4 which is the lowest value
reported for sub-micrometric thick films. We demonstrate Inverse spin Hall
effect (IS... | Inverse Spin Hall Effect in nanometer-thick YIG/Pt system | 1308.0192v1 |
Generalization of the Landau-Lifshitz-Gilbert equation by multi-body contributions to Gilbert damping for non-collinear magnets Sascha Brinker,1Manuel dos Santos Dias,2, 1,and Samir Lounis1, 2,y 1Peter Gr unberg Institut and Institute for Advanced Simulation, Forschungszentrum J ulich & JARA, 52425 J ulich, Germany 2F... | 2022-02-12 | We propose a systematic and sequential expansion of the
Landau-Lifshitz-Gilbert equation utilizing the dependence of the Gilbert
damping tensor on the angle between magnetic moments, which arises from
multi-body scattering processes. The tensor consists of a damping-like term and
a correction to the gyromagnetic ratio.... | Generalization of the Landau-Lifshitz-Gilbert equation by multi-body contributions to Gilbert damping for non-collinear magnets | 2202.06154v1 |
arXiv:1502.02699v1 [cond-mat.mes-hall] 9 Feb 2015Large amplitude oscillation of magnetization in spin-torq ue oscillator stabilized by field-like torque Tomohiro Taniguchi1, Sumito Tsunegi2, Hitoshi Kubota1, and Hiroshi Imamura1 1National Institute of Advanced Industrial Science and Tech nology (AIST), Spintronics Res... | 2015-02-09 | Oscillation frequency of spin torque oscillator with a perpendicularly
magnetized free layer and an in-plane magnetized pinned layer is theoretically
investigated by taking into account the field-like torque. It is shown that the
field-like torque plays an important role in finding the balance between the
energy suppli... | Large amplitude oscillation of magnetization in spin-torque oscillator stabilized by field-like torque | 1502.02699v1 |
arXiv:0804.0820v2 [cond-mat.mes-hall] 9 Aug 2008Inhomogeneous Gilbert damping from impurities and electro n-electron interactions E. M. Hankiewicz,1,2,∗G. Vignale,2and Y. Tserkovnyak3 1Department of Physics, Fordham University, Bronx, New York 10458, USA 2Department of Physics and Astronomy, University of Missour i, ... | 2008-04-04 | We present a unified theory of magnetic damping in itinerant electron
ferromagnets at order $q^2$ including electron-electron interactions and
disorder scattering. We show that the Gilbert damping coefficient can be
expressed in terms of the spin conductivity, leading to a Matthiessen-type
formula in which disorder and... | Inhomogeneous Gilbert damping from impurities and electron-electron interactions | 0804.0820v2 |
arXiv:1309.4897v1 [physics.atom-ph] 19 Sep 2013Van der Waals Coefficients for the Alkali-metal Atoms in the Ma terial Mediums aBindiya Arora∗andbB. K. Sahoo† aDepartment of Physics, Guru Nanak Dev University, Amritsar , Punjab-143005, India, bTheoretical Physics Division, Physical Research Laborato ry, Navrangpura, Ahm... | 2013-09-19 | The damping coefficients for the alkali atoms are determined very accurately
by taking into account the optical properties of the atoms and three distinct
types of trapping materials such as Au (metal), Si (semi-conductor) and
vitreous SiO2 (dielectric). Dynamic dipole polarizabilities are calculated
precisely for the ... | Van der Waals Coefficients for the Alkali-metal Atoms in the Material Mediums | 1309.4897v1 |
arXiv:1404.1488v2 [cond-mat.mtrl-sci] 27 Nov 2014Gilbert damping in noncollinear ferromagnets Zhe Yuan,1,∗Kjetil M. D. Hals,2,3Yi Liu,1Anton A. Starikov,1Arne Brataas,2and Paul J. Kelly1 1Faculty of Science and Technology and MESA+Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The... | 2014-04-05 | The precession and damping of a collinear magnetization displaced from its
equilibrium are described by the Landau-Lifshitz-Gilbert equation. For a
noncollinear magnetization, it is not known how the damping should be
described. We use first-principles scattering theory to investigate the damping
in one-dimensional tra... | Gilbert damping in noncollinear ferromagnets | 1404.1488v2 |
arXiv:2403.17732v1 [math.AP] 26 Mar 2024On a class of nonautonomous quasilinear systems with general time-gradually-degenerate damping Richard De la cruz∗and Wladimir Neves† March 28, 2024 Abstract Inthispaper, westudytwosystemswithatime-variable coeffi cientandgeneral time-gradually-degenerate damping. More explicitly... | 2024-03-26 | In this paper, we study two systems with a time-variable coefficient and
general time-gradually-degenerate damping. More explicitly, we construct the
Riemann solutions to the time-variable coefficient Zeldovich approximation and
time-variable coefficient pressureless gas systems both with general
time-gradually-degener... | On a class of nonautonomous quasilinear systems with general time-gradually-degenerate damping | 2403.17732v1 |
1 Spin torque and critical currents for magnet ic vortex nano-oscillator in nanopillars Konstantin Y. Guslienko1,2*, Gloria R. Aranda1, and Julian M. Gonzalez1 1Dpto. Fisica de Materiales, Universidad de l Pais Vasco, 20018 Donostia-San Sebastian, Spain 2IKERBASQUE, the Basque Foundation for Science, 48011 ... | 2009-12-30 | We calculated the main dynamic parameters of the spin polarized current
induced magnetic vortex oscillations in nanopillars, such as the range of
current density, where a vortex steady oscillations exist, the oscillation
frequency and orbit radius. We accounted for both the non-linear vortex
frequency and non-linear vo... | Spin torque and critical currents for magnetic vortex nano-oscillator in nanopillars | 0912.5521v1 |
arXiv:2206.03218v2 [math.AP] 11 Aug 2022DECAY PROPERTY OF SOLUTIONS TO THE WAVE EQUATION WITH SPACE-DEPENDENT DAMPING, ABSORBING NONLINEARITY, AND POLYNOMIALLY DECAYING DATA YUTA WAKASUGI Abstract. We study the large time behavior of solutions to the semiline ar wave equation with space-dependent damping and absorbin... | 2022-06-07 | We study the large time behavior of solutions to the semilinear wave equation
with space-dependent damping and absorbing nonlinearity in the whole space or
exterior domains. Our result shows how the amplitude of the damping
coefficient, the power of the nonlinearity, and the decay rate of the initial
data at the spatia... | Decay property of solutions to the wave equation with space-dependent damping, absorbing nonlinearity, and polynomially decaying data | 2206.03218v2 |
arXiv:1209.3120v1 [cond-mat.str-el] 14 Sep 2012Skyrmion Dynamics in Multiferroic Insulator Ye-Hua Liu,1You-Quan Li,1and Jung Hoon Han2,3,∗ 1Zhejiang Institute of Modern Physics and Department of Physi cs, Zhejiang University, Hangzhou 310027, People’s Republic of China 2Department of Physics and BK21 Physics Research... | 2012-09-14 | Recent discovery of Skyrmion crystal phase in insulating multiferroic
compound Cu$_2$OSeO$_3$ calls for new ways and ideas to manipulate the
Skyrmions in the absence of spin transfer torque from the conduction electrons.
It is shown here that the position-dependent electric field, pointed along the
direction of the ave... | Skyrmion Dynamics in Multiferroic Insulator | 1209.3120v1 |
Perpendicularly magnetized YIG films with small Gilbert damping constant and anomalous spin transport properties Qianbiao Liu1, 2, Kangkang Meng1*, Zedong Xu3, Tao Zhu4, Xiao guang Xu1, Jun Miao1 & Yong Jiang1* 1. Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and... | 2018-10-17 | The Y3Fe5O12 (YIG) films with perpendicular magnetic anisotropy (PMA) have
recently attracted a great deal of attention for spintronics applications.
Here, we report the induced PMA in the ultrathin YIG films grown on
(Gd2.6Ca0.4)(Ga4.1Mg0.25Zr0.65)O12 (SGGG) substrates by epitaxial strain
without preprocessing. Recipr... | Perpendicularly magnetized YIG films with small Gilbert damping constant and anomalous spin transport properties | 1810.07384v2 |
Spin Transport in Thick Insulating Antiferromagnetic Films Roberto E. Troncoso1, Scott A. Bender2, Arne Brataas1, and Rembert A. Duine1;2;3 1Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway 2Utrecht University, Leuvenlaan 4, 3584 CE Utrecht... | 2019-09-12 | Spin transport of magnonic excitations in uniaxial insulating
antiferromagnets (AFs) is investigated. In linear response to spin biasing and
a temperature gradient, the spin transport properties of
normal-metal--insulating antiferromagnet--normal-metal heterostructures are
calculated. We focus on the thick-film regime,... | Spin Transport in Thick Insulating Antiferromagnetic Films | 1909.05881v2 |
Non-local Gilbert damping tensor within the torque-torque correlation model Danny Thonig,1,Yaroslav Kvashnin,1Olle Eriksson,1, 2and Manuel Pereiro1 1Department of Physics and Astronomy, Material Theory, Uppsala University, SE-75120 Uppsala, Sweden 2School of Science and Technology, Orebro University, SE-701 82 Orebro,... | 2017-09-29 | An essential property of magnetic devices is the relaxation rate in magnetic
switching which depends strongly on the damping in the magnetisation dynamics.
It was recently measured that damping depends on the magnetic texture and,
consequently, is a non-local quantity. The damping enters the
Landau-Lifshitz-Gilbert equ... | Non-local Gilbert damping tensor within the torque-torque correlation model | 1709.10365v1 |
arXiv:2212.09164v1 [math.OC] 18 Dec 2022EXPONENTIAL DECAY OF SOLUTIONS OF DAMPED WAVE EQUATIONS IN ONE DIMENSIONAL SPACE IN THE LpFRAMEWORK FOR VARIOUS BOUNDARY CONDITIONS YACINE CHITOUR AND HOAI-MINH NGUYEN Abstract. We establish the decay of the solutions of the damped wave equ ations in one dimen- sional space for... | 2022-12-18 | We establish the decay of the solutions of the damped wave equations in one
dimensional space for the Dirichlet, Neumann, and dynamic boundary conditions
where the damping coefficient is a function of space and time. The analysis is
based on the study of the corresponding hyperbolic systems associated with the
Riemann ... | Exponential decay of solutions of damped wave equations in one dimensional space in the $L^p$ framework for various boundary conditions | 2212.09164v1 |
Damping of magnetization dynamics by phonon pumping Simon Streib,1Hedyeh Keshtgar,2and Gerrit E. W. Bauer1, 3 1Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands 2Institute for Advanced Studies in Basic Science, 45195 Zanjan, Iran 3Institute for Materials Resear... | 2018-04-19 | We theoretically investigate pumping of phonons by the dynamics of a magnetic
film into a non-magnetic contact. The enhanced damping due to the loss of
energy and angular momentum shows interference patterns as a function of
resonance frequency and magnetic film thickness that cannot be described by
viscous ("Gilbert")... | Damping of magnetization dynamics by phonon pumping | 1804.07080v2 |
Stability for nonlinear wave motions damped by time-dependent frictions? Zhe Jiaoa, Yong Xua,b, Lijing Zhaoa, aDepartment of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China bMIIT key Laboratory of Dynamics and Control of Complex Systems, Northwestern Polytechnical U... | 2022-03-12 | We are concerned with the dynamical behavior of solutions to semilinear wave
systems with time-varying damping and nonconvex force potential. Our result
shows that the dynamical behavior of solution is asymptotically stable without
any bifurcation and chaos. And it is a sharp condition on the damping
coefficient for th... | Stability for nonlinear wave motions damped by time-dependent frictions | 2203.06312v1 |
1 Strongly Enhanced Gilbert Damping in 3 d Transition Metal Ferromagnet Monolayers in Contact with Topological Insulator Bi 2Se3 Y. S. Hou1, and R. Q. Wu1 1 Department of Physics and Astronomy, University of California, Irvine, California 92697 -4575, USA Abstract Engineering Gilbert damping of ferromagneti... | 2019-02-22 | Engineering Gilbert damping of ferromagnetic metal films is of great
importance to exploit and design spintronic devices that are operated with an
ultrahigh speed. Based on scattering theory of Gilbert damping, we extend the
torque method originally used in studies of magnetocrystalline anisotropy to
theoretically dete... | Strongly Enhanced Gilbert Damping in 3d Transition Metal Ferromagnet Monolayers in Contact with Topological Insulator Bi2Se3 | 1902.08700v1 |
Ultrafast magnetization dynamics in half-metallic Co 2FeAl Heusler alloy R. S. Malik,1E. K. Delczeg-Czirjak,1D. Thonig,2R. Knut,1I. Vaskivskyi,1 R. Gupta,3S. Jana,1R. Stefanuik,1Y. O. Kvashnin,1S. Husain,3A. Kumar,3P. Svedlindh,3J. S oderstr om,1O. Eriksson,1, 2and O. Karis1 1Department of Physics and Astronomy, Uppsal... | 2020-02-27 | We report on optically induced, ultrafast magnetization dynamics in the
Heusler alloy $\mathrm{Co_{2}FeAl}$, probed by time-resolved magneto-optical
Kerr effect. Experimental results are compared to results from electronic
structure theory and atomistic spin-dynamics simulations. Experimentally, we
find that the demagn... | Ultrafast magnetization dynamics in half-metallic Co$_2$FeAl Heusler alloy | 2002.12255v1 |
Probing levitodynamics with multi-stochastic forces and the simple applications on the dark matter detection in optical levitation experiment Xi Cheng, Ji-Heng Guo, Wenyu Wang1,∗and Bin Zhu2,† 1Beijing University of Technology, Beijing 100124, China 2School of Physics, Yantai University, Yantai 264005, China If the ter... | 2023-12-07 | If the terrestrial environment is permeated by dark matter, the levitation
experiences damping forces and fluctuations attributed to dark matter. This
paper investigates levitodynamics with multiple stochastic forces, including
thermal drag, photon recoil, feedback, etc., assuming that all of these forces
adhere to the... | Probing levitodynamics with multi-stochastic forces and the simple applications on the dark matter detection in optical levitation experiment | 2312.04202v2 |
Time-retarded damping and magnetic inertia in the Landau-Lifshitz-Gilbert equation self-consistently coupled to electronic time-dependent nonequilibrium Green functions Utkarsh Bajpai and Branislav K. Nikoli´ c∗ Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA The conventional Landau-L... | 2018-10-25 | The conventional Landau-Lifshitz-Gilbert (LLG) equation is a widely used tool
to describe dynamics of local magnetic moments, viewed as classical vectors of
fixed length, with their change assumed to take place simultaneously with the
cause. Here we demonstrate that recently developed [M. D. Petrovi\'{c} {\em et
al.}, ... | Time-retarded damping and magnetic inertia in the Landau-Lifshitz-Gilbert equation self-consistently coupled to electronic time-dependent nonequilibrium Green functions | 1810.11016v2 |
arXiv:1408.6261v2 [math.AP] 15 May 2015Stability of an abstract–wave equation with delay and a Kelvin–Voigt damping Ka¨ ıs AMMARI∗, Serge NICAISE†and Cristina PIGNOTTI‡ Abstract. In this paper we consider a stabilization problem for an abstract wav e equation with delay and a Kelvin–Voigt damping. We prove an exponen... | 2014-08-26 | In this paper we consider a stabilization problem for the abstract-wave
equation with delay. We prove an exponential stability result for appropriate
damping coefficient. The proof of the main result is based on a
frequency-domain approach. | Stability of an abstract-wave equation with delay and a Kelvin-Voigt damping | 1408.6261v2 |
arXiv:1406.6225v2 [cond-mat.mtrl-sci] 16 Nov 2014Interface enhancement of Gilbert damping from first-princi ples Yi Liu,1,∗Zhe Yuan,1,2,†R. J. H. Wesselink,1Anton A. Starikov,1and Paul J. Kelly1 1Faculty of Science and Technology and MESA+Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Ensche... | 2014-06-24 | The enhancement of Gilbert damping observed for Ni80Fe20 (Py) films in
contact with the non-magnetic metals Cu, Pd, Ta and Pt, is quantitatively
reproduced using first-principles scattering theory. The "spin-pumping" theory
that qualitatively explains its dependence on the Py thickness is generalized
to include a numbe... | Interface enhancement of Gilbert damping from first-principles | 1406.6225v2 |
arXiv:1606.04483v2 [cond-mat.supr-con] 7 Oct 2016Anomalous Damping of a Micro-electro-mechanical Oscillat or in Superfluid3He-B P. Zheng,1W.G. Jiang,1C.S. Barquist,1Y. Lee,1,∗and H.B. Chan2 1Department of Physics, University of Florida, Gainesville , Florida 32611-8440, USA 2Department of Physics, The Hong Kong Univer... | 2016-06-14 | The mechanical resonance properties of a micro-electro-mechanical oscillator
with a gap of 1.25 $\mu$m was studied in superfluid $^3$He-B at various
pressures. The oscillator was driven in the linear damping regime where the
damping coefficient is independent of the oscillator velocity. The quality
factor of the oscill... | Anomalous Damping of a Micro-electro-mechanical Oscillator in Superfluid $^3$He-B | 1606.04483v2 |
arXiv:1202.5379v1 [math.AP] 24 Feb 2012SMALL DATA GLOBAL EXISTENCE FOR THE SEMILINEAR WAVE EQUATION WITH SPACE-TIME DEPENDENT DAMPING YUTA WAKASUGI Abstract. In this paper we consider the critical exponent problem for t he semilinear wave equation with space-time dependent dampin g. When the damping is effective, it i... | 2012-02-24 | In this paper we consider the critical exponent problem for the semilinear
wave equation with space-time dependent damping. When the damping is effective,
it is expected that the critical exponent agrees with that of only space
dependent coefficient case. We shall prove that there exists a unique global
solution for sm... | Small data global existence for the semilinear wave equation with space-time dependent damping | 1202.5379v1 |
1 Low damping and microstructural perfection of sub-4 0nm-thin yttrium iron garnet films grown by liquid phase epi taxy Carsten Dubs, 1* Oleksii Surzhenko, 1 Ronny Thomas, 2 Julia Osten, 2 Tobias Schneider, 2 Kilian Lenz, 2 Jörg Grenzer, 2 René Hübner, 2 Elke Wendler 3 1 INNOVENT e.V. Technologieentwicklung, P... | 2019-11-21 | The field of magnon spintronics is experiencing an increasing interest in the
development of solutions for spin-wave-based data transport and processing
technologies that are complementary or alternative to modern CMOS
architectures. Nanometer-thin yttrium iron garnet (YIG) films have been the
gold standard for insulat... | Low damping and microstructural perfection of sub-40nm-thin yttrium iron garnet films grown by liquid phase epitaxy | 1911.09400v1 |
arXiv:1210.6879v1 [math.AP] 25 Oct 2012Decay rates for the damped wave equation on the torus With an appendix by St´ ephane Nonnenmacher∗ Nalini Anantharaman†and Matthieu L´ eautaud‡, Universit´ e Paris-Sud 11, Math´ ematiques, Bˆ atiment 425, 91405 Orsay Cedex, France October 26, 2012 Abstract We address the decay r... | 2012-10-25 | We address the decay rates of the energy for the damped wave equation when
the damping coefficient $b$ does not satisfy the Geometric Control Condition
(GCC). First, we give a link with the controllability of the associated
Schr\"odinger equation. We prove in an abstract setting that the observability
of the Schr\"odin... | Decay rates for the damped wave equation on the torus | 1210.6879v1 |
arXiv:2302.06402v2 [gr-qc] 24 Oct 2023Damping of gravitational waves in f(R)gravity Haiyuan Feng1,∗and LaiYuan Su1,† 1Department of Physics, Southern University of Science and T echnology, Shenzhen 518055, Guangdong, China Abstract We study the damping of f(R) gravitational waves by matter in flat spacetime and in exp... | 2023-02-13 | We study the damping of $f(R)$ gravitational waves by matter in flat
spacetime and in expanding universe. In the former case, we find that the
Landau damping of scalar mode in $f(R)$ theory exists, while that of the tensor
mode in general relativity does not; we also present the viscosity coefficients
and dispersion re... | Damping of gravitational waves in f(R) gravity | 2302.06402v2 |
Controlling acoustic waves using magneto-elastic Fano resonances Controlling acoustic waves using magneto-elastic Fano resonances O. S. Latcham,1Y. I. Gusieva,2A. V. Shytov,1O. Y. Gorobets,2and V. V. Kruglyak1,a) 1)University of Exeter, Stocker Road, Exeter, EX4 4QL, United Kingdom 2)Igor Sikorsky Kyiv Polytechnic Inst... | 2019-06-17 | We propose and analyze theoretically a class of energy-efficient
magneto-elastic devices for analogue signal processing. The signals are carried
by transverse acoustic waves while the bias magnetic field controls their
scattering from a magneto-elastic slab. By tuning the bias field, one can alter
the resonant frequenc... | Controlling acoustic waves using magnetoelastic Fano resonances | 1906.07297v2 |
Annihilation of topological solitons in magnetism with spin wave burst nale: The role of nonequilibrium electrons causing nonlocal damping and spin pumping over ultrabroadband frequency range Marko D. Petrovi c,1Utkarsh Bajpai,1Petr Plech a c,2and Branislav K. Nikoli c1, 1Department of Physics and Astronomy, Univ... | 2019-08-08 | We not only reproduce burst of short-wavelength spin waves (SWs) observed in
recent experiment [S. Woo et al., Nat. Phys. 13, 448 (2017)] on
magnetic-field-driven annihilation of two magnetic domain walls (DWs) but,
furthermore, we predict that this setup additionally generates highly unusual}
pumping of electronic spi... | Annihilation of topological solitons in magnetism with spin wave burst finale: The role of nonequilibrium electrons causing nonlocal damping and spin pumping over ultrabroadband frequency range | 1908.03194v5 |
arXiv:1508.07118v3 [math.AP] 25 Aug 2016THE INVISCID LIMIT FOR THE LANDAU-LIFSHITZ-GILBERT EQUATION IN THE CRITICAL BESOV SPACE ZIHUA GUO AND CHUNYAN HUANG Abstract. We prove that in dimensions three and higher the Landau-Lifshitz- Gilbert equation with small initial data in the critical Besov space is glob ally well... | 2015-08-28 | We prove that in dimensions three and higher the Landau-Lifshitz- Gilbert
equation with small initial data in the critical Besov space is globally
wellposed in a uniform way with respect to the Gilbert damping parameter. Then
we show that the global solution converges to that of the Schrodinger maps in
the natural spa... | The inviscid limit for the Landau-Lifshitz-Gilbert equation in the critical Besov space | 1508.07118v3 |
Intrinsic Damping Phenomena from Quantum to Classical Magnets: An ab-initio Study of Gilbert Damping in Pt/Co Bilayer Farzad Mahfouzi,1,Jinwoong Kim,1, 2and Nicholas Kioussis1,y 1Department of Physics and Astronomy, California State University, Northridge, CA, USA 2Department of Physics and Astronomy, Rutgers Universi... | 2017-09-14 | A fully quantum mechanical description of the precessional damping of Pt/Co
bilayer is presented in the framework of the Keldysh Green function approach
using {\it ab initio} electronic structure calculations. In contrast to
previous calculations of classical Gilbert damping ($\alpha_{GD}$), we
demonstrate that $\alpha... | Intrinsic Damping Phenomena from Quantum to Classical Magnets:An ab-initio Study of Gilbert Damping in Pt/Co Bilayer | 1709.04911v2 |
arXiv:2310.08807v1 [cond-mat.mes-hall] 13 Oct 2023Unified framework of the microscopic Landau-Lifshitz-Gilb ert equation and its application to Skyrmion dynamics Fuming Xu§,1Gaoyang Li§,1Jian Chen,2Zhizhou Yu,3Lei Zhang,4, 5,∗Baigeng Wang,6and Jian Wang1, 2,† 1College of Physics and Optoelectronic Engineering, Shenzh ... | 2023-10-13 | The Landau-Lifshitz-Gilbert (LLG) equation is widely used to describe
magnetization dynamics. We develop a unified framework of the microscopic LLG
equation based on the nonequilibrium Green's function formalism. We present a
unified treatment for expressing the microscopic LLG equation in several
limiting cases, inclu... | Unified framework of the microscopic Landau-Lifshitz-Gilbert equation and its application to Skyrmion dynamics | 2310.08807v1 |
Gilbert damping phenomenology for two-sublattice magnets Akashdeep Kamra,1,Roberto E. Troncoso,1Wolfgang Belzig,2and Arne Brataas1,y 1Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway 2Department of Physics, University of Konstanz, D-78457 ... | 2018-08-13 | We present a systematic phenomenological description of Gilbert damping in
two-sublattice magnets. Our theory covers the full range of materials from
ferro- via ferri- to antiferromagnets. Following a Rayleigh dissipation
functional approach within a Lagrangian classical field formulation, the theory
captures intra- as... | Gilbert damping phenomenology for two-sublattice magnets | 1808.04385v2 |
arXiv:1508.05778v3 [math.AP] 10 Oct 2016Scaling variables and asymptotic profiles for the semilinear damped wave equation with variable coefficients Yuta Wakasugi Graduate School of Mathematics, Nagoya University, Furocho, Chikusaku, Nagoya 464-8602, Japan Email:yuta.wakasugi@math.nagoya-u.ac.jp Abstract We study the as... | 2015-08-24 | We study the asymptotic behavior of solutions for the semilinear damped wave
equation with variable coefficients. We prove that if the damping is effective,
and the nonlinearity and other lower order terms can be regarded as
perturbations, then the solution is approximated by the scaled Gaussian of the
corresponding li... | Scaling variables and asymptotic profiles for the semilinear damped wave equation with variable coefficients | 1508.05778v3 |
Anisotropic and controllable Gilbert-Bloch dissipation in spin valves Akashdeep Kamra,1,Dmytro M. Polishchuk,2Vladislav Korenivski,2and Arne Brataas1 1Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, Trondheim, Norway 2Nanostructure Physics, Royal Institute of Tech... | 2018-10-31 | Spin valves form a key building block in a wide range of spintronic concepts
and devices from magnetoresistive read heads to spin-transfer-torque
oscillators. We elucidate the dependence of the magnetic damping in the free
layer on the angle its equilibrium magnetization makes with that in the fixed
layer. The spin pum... | Anisotropic and controllable Gilbert-Bloch dissipation in spin valves | 1811.00020v2 |
Fast magnetization reversal of a magnetic nanoparticle induced by cosine chirp microwave field pulse M. T. Islam,1,a)M. A. S. Akanda,1M. A. J. Pikul,1and X. S. Wang2,b) 1)Physics Discipline, Khulna University, Khulna 9208, Bangladesh 2)School of Physics and Electronics, Hunan University, Changsha 410082, China We invest... | 2021-02-20 | We investigate the magnetization reversal of single-domain magnetic
nanoparticle driven by the circularly polarized cosine chirp microwave pulse
(CCMP). The numerical findings, based on the Landau-Lifshitz-Gilbert equation,
reveal that the CCMP is by itself capable of driving fast and energy-efficient
magnetization rev... | Fast magnetization reversal of a magnetic nanoparticle induced by cosine chirp microwave field pulse | 2102.10394v2 |
Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping Qian Liu,1,H. Y. Yuan,2,Ke Xia,1, 3and Zhe Yuan1,y 1The Center for Advanced Quantum Studies and Department of Physics, Beijing Normal University, 100875 Beijing, China 2Department of Physics, South University of Science and Techn... | 2017-10-13 | Damping in magnetization dynamics characterizes the dissipation of magnetic
energy and is essential for improving the performance of spintronics-based
devices. While the damping of ferromagnets has been well studied and can be
artificially controlled in practice, the damping parameters of
antiferromagnetic materials ar... | Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping | 1710.04766v1 |
1 Temperature -dependent Gilbert damping of Co 2FeAl thin films with different degree of atomic order Ankit Kumar1*, Fan Pan2,3, Sajid Husain4, Serkan Akansel1, Rimantas Brucas1, Lars Bergqvist2,3, Sujeet Chaudhary4, and Peter Svedlindh1# 1Department of Engineering Sciences, Uppsala University, Box 534, S... | 2017-06-14 | Half-metallicity and low magnetic damping are perpetually sought for in
spintronics materials and full Heusler alloys in this respect provide
outstanding properties. However, it is challenging to obtain the well-ordered
half-metallic phase in as-deposited full Heusler alloys thin films and theory
has struggled to estab... | Temperature-dependent Gilbert damping of Co2FeAl thin films with different degree of atomic order | 1706.04670v2 |
arXiv:1403.3914v2 [math.NT] 20 Aug 2015INTERPOLATING LOCAL CONSTANTS IN FAMILIES GILBERT MOSS 1.Introduction LetG=GLn(F), letkbe an algebraically closed field of characteristic ℓ, and W(k) its ring of Witt vectors. By an ℓ-adic family of representations we mean an A[G]-moduleVwhereAis a commutative W(k)-algebra with u... | 2014-03-16 | We extend the theory of local constants to l-adic families of representations
of GL_n(F) where F is a p-adic field with l not equal to p. We construct zeta
integrals and gamma factors for representations coming from the conjectural
"local Langlands correspondence in families" of Emerton-Helm, proving a
rationality resu... | Interpolating local constants in families | 1403.3914v2 |
Optimization of Time -Resolv ed Magneto -optical Kerr Effect S ignals for Magnetization Dynamics Measurements Dustin M. Lattery1, Delin Zhang2, Jie Zhu1, Paul Crowell3, Jian-Ping Wang2 and Xiaojia Wang1* 1Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA 2Department of Elec... | 2018-03-04 | Recently magnetic storage and magnetic memory have shifted towards the use of
magnetic thin films with perpendicular magnetic anisotropy (PMA). Understanding
the magnetic damping in these materials is crucial, but normal Ferromagnetic
Resonance (FMR) measurements face some limitations. The desire to quantify the
dampin... | Optimization of Time-Resolved Magneto-optical Kerr Effect Signals for Magnetization Dynamics Measurements | 1803.01280v2 |
Damping-Enhanced Magnon Transmission Xiyin Ye,1Ke Xia,2Gerrit E. W. Bauer,3, 4and Tao Yu1,∗ 1School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China 2School of Physics, Southeast University, Jiangsu 211189, China 3WPI-AIMR and Institute for Materials Research and CSRN, Tohoku University, S... | 2024-01-22 | The inevitable Gilbert damping in magnetization dynamics is usually regarded
as detrimental to spin transport. Here we demonstrate in a
ferromagnetic-insulator--normal-metal heterostructure that the strong momentum
dependence and chirality of the eddy-current-induced damping causes also
beneficial scattering properties... | Damping-Enhanced Magnon Transmission | 2401.12022v1 |
arXiv:0808.3923v1 [cond-mat.mtrl-sci] 28 Aug 2008Gilbert Damping in Conducting Ferromagnets II: Model Tests of the Torque-Correlation Formula Ion Garate and Allan MacDonald Department of Physics, The University of Texas at Austin, Au stin TX 78712 (Dated: October 29, 2018) We report on a study of Gilbert damping due ... | 2008-08-28 | We report on a study of Gilbert damping due to particle-hole pair excitations
in conducting ferromagnets. We focus on a toy two-band model and on a four-band
spherical model which provides an approximate description of ferromagnetic
(Ga,Mn)As. These models are sufficiently simple that disorder-ladder-sum vertex
correct... | Gilbert Damping in Conducting Ferromagnets II: Model Tests of the Torque-Correlation Formula | 0808.3923v1 |
Reliable Damping of Free Surface Waves in Numerical Simulations Robinson Peri c1, Moustafa Abdel-Maksoud Hamburg University of Technology (TUHH), Institute for Fluid Dynamics and Ship Theory (M8), Hamburg, Germany Abstract This paper generalizes existing approaches for free-surface wave damping via momentum sinks for ... | 2015-05-15 | This paper generalizes existing approaches for free-surface wave damping via
momentum sinks for flow simulations based on the Navier-Stokes equations. It is
shown in 2D flow simulations that, to obtain reliable wave damping, the
coefficients in the damping functions must be adjusted to the wave parameters.
A scaling la... | Reliable Damping of Free Surface Waves in Numerical Simulations | 1505.04087v2 |
1 Experimental Investigation of Temperature-Dependent Gilbert Damping in Permalloy Thin Films Yuelei Zhao1,2†, Qi Song1,2†, See-Hun Yang3, Tang Su1,2, Wei Yuan1,2, Stuart S. P. Parkin3,4, Jing Shi5*, and Wei Han1,2* 1International Center for Quantum Materials, Peking University, Beijing, 100871, P. R. China ... | 2016-02-23 | The Gilbert damping of ferromagnetic materials is arguably the most important
but least understood phenomenological parameter that dictates real-time
magnetization dynamics. Understanding the physical origin of the Gilbert
damping is highly relevant to developing future fast switching spintronics
devices such as magnet... | Experimental Investigation of Temperature-Dependent Gilbert Damping in Permalloy Thin Films | 1602.07325v1 |
Relativistic theory of magnetic inertia in ultrafast spin dynamics Ritwik Mondal,Marco Berritta, Ashis K. Nandy, and Peter M. Oppeneer Department of Physics and Astronomy, Uppsala University, P. O. Box 516, SE-75120 Uppsala, Sweden (Dated: November 12, 2018) The influence of possible magnetic inertia effects has recentl... | 2017-03-20 | The influence of possible magnetic inertia effects has recently drawn
attention in ultrafast magnetization dynamics and switching. Here we derive
rigorously a description of inertia in the Landau-Lifshitz-Gilbert equation on
the basis of the Dirac-Kohn-Sham framework. Using the Foldy-Wouthuysen
transformation up to the... | Relativistic theory of magnetic inertia in ultrafast spin dynamics | 1704.01559v1 |
arXiv:1012.5473v1 [cond-mat.other] 25 Dec 2010Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current Zai-Dong Li1,2,3, Qiu-Yan Li1, X. R. Wang3, W. M. Liu4, J. Q. Liang5, and Guangsheng Fu2 1Department of Applied Physics, Hebei University of Technol ogy, T... | 2010-12-25 | We investigate the dynamics of domain wall in ferromagnetic nanowire with
spin-transfer torque. The critical current condition is obtained analytically.
Below the critical current, we get the static domain wall solution which shows
that the spin-polarized current can't drive domain wall moving continuously. In
this cas... | Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current | 1012.5473v1 |
1 In situ electric-field control of ferromagnetic resonance in the low- loss organic-based ferrimagnet V[TCNE] x∼2 Seth W. Kurfman1, Andrew Franson1, Piyush Shah2, Yueguang Shi3, Hil Fung Harry Cheung4, Katherine E. Nygren5, Mitchell Swyt5, Kristen S. Buchanan5, Gregory D. Fuchs4, Michael E. Flatté3,6, Gopalan Srin... | 2023-08-07 | We demonstrate indirect electric-field control of ferromagnetic resonance
(FMR) in devices that integrate the low-loss, molecule-based, room-temperature
ferrimagnet vanadium tetracyanoethylene (V[TCNE]$_{x \sim 2}$) mechanically
coupled to PMN-PT piezoelectric transducers. Upon straining the V[TCNE]$_x$
films, the FMR ... | $\textit{In situ}$ electric-field control of ferromagnetic resonance in the low-loss organic-based ferrimagnet V[TCNE]$_{x\sim 2}$ | 2308.03353v1 |
Persistence effects in deterministic diffusion Thomas Gilbert1,and David P. Sanders2, † 1Center for Nonlinear Phenomena and Complex Systems, Universit ´e Libre de Bruxelles, C. P . 231, Campus Plaine, B-1050 Brussels, Belgium 2Departamento de F ´ısica, Facultad de Ciencias, Universidad Nacional Aut´onoma de M ´exico, ... | 2009-08-05 | In systems which exhibit deterministic diffusion, the gross parameter
dependence of the diffusion coefficient can often be understood in terms of
random walk models. Provided the decay of correlations is fast enough, one can
ignore memory effects and approximate the diffusion coefficient according to
dimensional argume... | Persistence effects in deterministic diffusion | 0908.0600v1 |
arXiv:1309.7483v1 [cond-mat.mtrl-sci] 28 Sep 2013High-efficiency GHz frequency doubling without power thresh old in thin-film Ni 81Fe19 Cheng Cheng1and William E. Bailey1 Materials Science and Engineering Program, Department of A pplied Physics and Applied Mathematics, Columbia University, New York, NY 10027 We demonstr... | 2013-09-28 | We demonstrate efficient second-harmonic generation at moderate input power
for thin film Ni81Fe19 undergoing ferromagnetic resonance (FMR). Powers of the
generated second-harmonic are shown to be quadratic in input power, with an
upconversion ratio three orders of magnitude higher than that demonstrated in
ferrite. Th... | High-efficiency GHz frequency doubling without power threshold in thin-film Ni81Fe19 | 1309.7483v1 |
arXiv:1910.11200v1 [cond-mat.mes-hall] 24 Oct 2019Spin waves in ferromagnetic thin films Zhiwei Sun School of Mathematical Sciences, Soochow University, Suzh ou, China Jingrun Chen∗ School of Mathematical Sciences, Soochow University, Suzh ou, China and Mathematical Center for Interdisciplinary Research, Sooc how Univ... | 2019-10-24 | A spin wave is the disturbance of intrinsic spin order in magnetic materials.
In this paper, a spin wave in the Landau-Lifshitz-Gilbert equation is obtained
based on the assumption that the spin wave maintains its shape while it
propagates at a constant velocity. Our main findings include: (1) in the
absence of Gilbert... | Spin waves in ferromagnetic thin films | 1910.11200v1 |
Lévy walks on lattices as multi-state processes Giampaolo Cristadoro y, Thomas Gilbert z, Marco Lenci y§ and David P. Sanders k yDipartimento di Matematica, Università di Bologna, Piazza di Porta S. Donato 5, 40126 Bologna, Italy zCenter for Nonlinear Phenomena and Complex Systems, Université Libre de Bruxelles, C. P. ... | 2015-01-21 | Continuous-time random walks combining diffusive scattering and ballistic
propagation on lattices model a class of L\'evy walks. The assumption that
transitions in the scattering phase occur with exponentially-distributed
waiting times leads to a description of the process in terms of multiple
states, whose distributio... | Lévy walks on lattices as multi-state processes | 1501.05216v1 |
E ect of vertex corrections on the enhancement of Gilbert damping in spin pumping into a two-dimensional electron gas M. Yama,1M. Matsuo,2;3;4;5T. Kato1, 1Institute for Solid State Physics, The University of Tokyo, Kashiwa, Japan 2Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beij... | 2022-01-27 | We theoretically consider the effect of vertex correction on spin pumping
from a ferromagnetic insulator (FI) into a two-dimensional electron gas (2DEG)
in which the Rashba and Dresselhaus spin-orbit interactions coexist. The
Gilbert damping in the FI is enhanced by elastic spin-flipping or magnon
absorption. We show t... | Effect of vertex corrections on the enhancement of Gilbert damping in spin pumping into a two-dimensional electron gas | 2201.11498v3 |
Machta-Zwanzig regime of anomalous diffusion in infinite-horizon billiards Giampaolo Cristadoro,1Thomas Gilbert,2Marco Lenci,1, 3and David P. Sanders4 1Dipartimento di Matematica, Universit `a di Bologna, Piazza di Porta S. Donato 5, 40126 Bologna, Italy 2Center for Nonlinear Phenomena and Complex Systems, Universit ´e ... | 2014-08-02 | We study diffusion on a periodic billiard table with infinite horizon in the
limit of narrow corridors. An effective trapping mechanism emerges according to
which the process can be modeled by a L\'evy walk combining
exponentially-distributed trapping times with free propagation along paths
whose precise probabilities ... | Machta-Zwanzig regime of anomalous diffusion in infinite-horizon billiards | 1408.0349v1 |
Stability of a Magnetically Levitated Nanomagnet in Vacuum: E ects of Gas and Magnetization Damping Katja Kustura,1, 2Vanessa Wachter,3, 4Adri an E. Rubio L opez,1, 2and Cosimo C. Rusconi5, 6 1Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria. 2Institu... | 2021-06-28 | In the absence of dissipation a non-rotating magnetic nanoparticle can be
stably levitated in a static magnetic field as a consequence of the spin origin
of its magnetization. Here we study the effects of dissipation on the stability
of the system, considering the interaction with the background gas and the
intrinsic G... | Stability of a Magnetically Levitated Nanomagnet in Vacuum: Effects of Gas and Magnetization Damping | 2106.14858v3 |
A CLASS OF FINITE DIFFERENCE METHODS FOR SOLVING INHOMOGENEOUS DAMPED WAVE EQUATIONS FAZEL HADADIFARD, SATBIR MALHI, AND ZHENGYI XIAO Abstract. In this paper, a class of nite di erence numerical techniques is presented to solve the second-order linear inhomogeneous damped wave equation. The consistency, stability, and... | 2020-08-18 | In this paper, a class of finite difference numerical techniques is presented
to solve the second-order linear inhomogeneous damped wave equation. The
consistency, stability, and convergences of these numerical schemes are
discussed. The results obtained are compared to the exact solution, ordinary
explicit, implicit f... | A class of Finite difference Methods for solving inhomogeneous damped wave equations | 2008.08043v2 |
Super
uid spin transport in ferro- and antiferromagnets E. B. Sonin Racah Institute of Physics, Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel (Dated: March 25, 2019) This paper focuses on spin super
uid transport, observation of which was recently reported in antiferromagnet Cr 2O3[Yuan et al. , Sc... | 2018-10-16 | This paper focuses on spin superfluid transport, observation of which was
recently reported in antiferromagnet Cr$_2$O$_3$ [Yuan et al., Sci. Adv. 4,
eaat1098 (2018)]. This paper analyzes the role of dissipation in transformation
of spin current injected with incoherent magnons to a superfluid spin current
near the int... | Superfluid spin transport in ferro- and antiferromagnets | 1810.07020v4 |
Generalisation of Gilbert damping and magnetic inertia parameter as a series of higher-order relativistic terms Ritwik Mondalz, Marco Berritta and Peter M. Oppeneer Department of Physics and Astronomy, Uppsala University, P. O. Box 516, SE-751 20 Uppsala, Sweden E-mail: ritwik.mondal@physics.uu.se Abstract. The phenome... | 2018-04-03 | The phenomenological Landau-Lifshitz-Gilbert (LLG) equation of motion remains
as the cornerstone of contemporary magnetisation dynamics studies, wherein the
Gilbert damping parameter has been attributed to first-order relativistic
effects. To include magnetic inertial effects the LLG equation has previously
been extend... | Generalisation of Gilbert damping and magnetic inertia parameter as a series of higher-order relativistic terms | 1804.09242v1 |
arXiv:1412.4032v1 [cond-mat.mes-hall] 12 Dec 2014Spin waves in micro-structured yttrium iron garnet nanomet er-thick films Matthias B. Jungfleisch,1,a)Wei Zhang,1Wanjun Jiang,1Houchen Chang,2Joseph Sklenar,3Stephen M. Wu,1 John E. Pearson,1Anand Bhattacharya,1John B. Ketterson,3Mingzhong Wu,2and Axel Hoffmann1 1)Materia... | 2014-12-12 | We investigated the spin-wave propagation in a micro-structured yttrium iron
garnet waveguide of $40$ nm thickness. Utilizing spatially-resolved Brillouin
light scattering microscopy, an exponential decay of the spin-wave amplitude of
$(10.06 \pm 0.83)$ $\mu$m was observed. This leads to an estimated Gilbert
damping co... | Spin waves in micro-structured yttrium iron garnet nanometer-thick films | 1412.4032v1 |
The superior role of the Gilbert damping on the signal-to-noise ratio in heat-assisted magnetic recording O. Muthsam,1,a)F. Slanovc,1C. Vogler,1and D. Suess1 University of Vienna, Physics of Functional Materials, Boltzmanngasse 5, 1090 Vienna, Austria (Dated: 25 September 2019) In magnetic recording the signal-to-noise... | 2019-07-10 | In magnetic recording the signal-to-noise ratio (SNR) is a good indicator for
the quality of written bits. However, a priori it is not clear which parameters
have the strongest influence on the SNR. In this work, we investigate the role
of the Gilbert damping on the SNR. Grains consisting of FePt like hard magnetic
mat... | The superior role of the Gilbert damping on the signal-to-noise ratio in heat-assisted magnetic recording | 1907.04577v2 |
arXiv:2307.05865v1 [math.AP] 12 Jul 2023Asymptotic behavior of solutions to the Cauchy problem for 1 -D p-system with space dependent damping Akitaka Matsumura and Kenji Nishihara∗ Osaka University and Waseda University, Japan Abstract We consider the Cauchy problem for one-dimensional p-system with damping of space-... | 2023-07-12 | We consider the Cauchy problem for one-dimensional p-system with damping of
space-dependent coefficient. This system models the compressible flow through
porous media in the Lagrangean coordinate. Our concern is an asymptotic
behavior of solutions, which is expected to be the diffusion wave based on the
Darcy law. To s... | Asymptotic behavior of solutions to the Cauchy problem for 1-D p-system with space dependent damping | 2307.05865v1 |
arXiv:2004.08082v1 [cond-mat.mes-hall] 17 Apr 2020Collective coordinate study of spin wave emission from dyna mic domain wall Gen Tatara RIKEN Center for Emergent Matter Science (CEMS) 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan Rubn M. Otxoa de Zuazola Hitachi Cambridge Laboratory, J. J. Thomson Avenue, CB3 OHE, Cam... | 2020-04-17 | We study theoretically the spin wave emission from a moving domain wall in a
ferromagnet. Introducing a deformation mode describing a modulation of the wall
thickness in the collective coordinate description, we show that thickness
variation couples to the spin wave linearly and induces spin wave emission. The
dominant... | Collective coordinate study of spin wave emission from dynamic domain wall | 2004.08082v1 |
Low spin wave damping in the insulating chiral magnet Cu 2OSeO 3 I. Stasinopoulos,1S. Weichselbaumer,1A. Bauer,2J. Waizner,3 H. Berger,4S. Maendl,1M. Garst,3, 5C. P
eiderer,2and D. Grundler6, 1Physik Department E10, Technische Universit at M unchen, D-85748 Garching, Germany 2Physik Department E51, Technische Universi... | 2017-05-09 | Chiral magnets with topologically nontrivial spin order such as Skyrmions
have generated enormous interest in both fundamental and applied sciences. We
report broadband microwave spectroscopy performed on the insulating chiral
ferrimagnet Cu$_{2}$OSeO$_{3}$. For the damping of magnetization dynamics we
find a remarkabl... | Low spin wave damping in the insulating chiral magnet Cu$_{2}$OSeO$_{3}$ | 1705.03416v1 |
arXiv:1507.06748v1 [cond-mat.mes-hall] 24 Jul 2015Boosting Domain Wall Propagation by Notches H. Y. Yuan and X. R. Wang1,2,∗ 1Physics Department, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 2HKUST Shenzhen Research Institute, Shenzhen 518057, China Wereportacounter-intuitiv... | 2015-07-24 | We report a counter-intuitive finding that notches in an otherwise
homogeneous magnetic nanowire can boost current-induced domain wall (DW)
propagation. DW motion in notch-modulated wires can be classified into three
phases: 1) A DW is pinned around a notch when the current density is below the
depinning current densit... | Boosting Domain Wall Propagation by Notches | 1507.06748v1 |
Large spin pumping e ect in antisymmetric precession of Ni79Fe21/Ru/Ni 79Fe21 H. Yang,1Y. Li,1and W.E. Bailey1,a) Materials Science and Engineering, Dept. of Applied Physics and Applied Mathematics, Columbia University, New York NY 10027 (Dated: 16 September 2021) In magnetic trilayer structures, a contribution to the ... | 2016-03-25 | In magnetic trilayer structures, a contribution to the Gilbert damping of
ferromagnetic resonance arises from spin currents pumped from one layer to
another. This contribution has been demonstrated for layers with weakly
coupled, separated resonances, where magnetization dynamics are excited
predominantly in one layer ... | Large spin pumping effect in antisymmetric precession of Ni$_{79}$Fe$_{21}$/Ru/Ni$_{79}$Fe$_{21}$ | 1603.07977v1 |
arXiv:2206.09969v1 [cond-mat.mtrl-sci] 20 Jun 2022APS/123-QED First-principles calculation of the parameters used by ato mistic magnetic simulations Sergiy Mankovsky and Hubert Ebert Department of Chemistry/Phys. Chemistry, LMU Munich, Butenandtstrasse 11, D-81377 Munich, Germany (Dated: June 22, 2022) While the grou... | 2022-06-20 | While the ground state of magnetic materials is in general well described on
the basis of spin density functional theory (SDFT), the theoretical description
of finite-temperature and non-equilibrium properties require an extension
beyond the standard SDFT. Time-dependent SDFT (TD-SDFT), which give for example
access to... | First-principles calculation of the parameters used by atomistic magnetic simulations | 2206.09969v1 |
An efficient automated data analytics approach to large scale computational comparative linguistics Gabija Mikulyte gabija.mikulyte@gmail.comandDavid Gilbert david.gilbert@brunel.ac.uk Department of Computer Science Brunel University London Uxbridge UB8 3PH U.K.arXiv:2001.11899v1 [cs.CL] 31 Jan 2020Contents List of Fig... | 2020-01-31 | This research project aimed to overcome the challenge of analysing human
language relationships, facilitate the grouping of languages and formation of
genealogical relationship between them by developing automated comparison
techniques. Techniques were based on the phonetic representation of certain key
words and conce... | An efficient automated data analytics approach to large scale computational comparative linguistics | 2001.11899v1 |
1 This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Applied Physics Letters 111 (19), 192404 (2017) and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5002004 Ultra -low damping in lift-off stru... | 2019-02-12 | We show that using maskless photolithography and the lift-off technique,
patterned yttrium iron garnet thin films possessing ultra-low Gilbert damping
can be accomplished. The films of 70 nm thickness were grown on (001)-oriented
gadolinium gallium garnet by means of pulsed laser deposition, and they exhibit
high cryst... | Ultra-low damping in lift-off structured yttrium iron garnet thin films | 1902.04605v1 |
Diffusive properties of persistent walks on cubic lattices with application to periodic Lorentz gases Thomas Gilberty, Huu Chuong Nguyen y, David P. Sanders z yCenter for Nonlinear Phenomena and Complex Systems, Universit ´e Libre de Bruxelles, C. P. 231, Campus Plaine, B-1050 Brussels, Belgium zDepartamento de F ´ısic... | 2010-09-20 | We calculate the diffusion coefficients of persistent random walks on cubic
and hypercubic lattices, where the direction of a walker at a given step
depends on the memory of one or two previous steps. These results are then
applied to study a billiard model, namely a three-dimensional periodic Lorentz
gas. The geometry... | Diffusive properties of persistent walks on cubic lattices with application to periodic Lorentz gases | 1009.3922v1 |
arXiv:2106.09077v1 [math.AP] 16 Jun 2021SHARP UPPER AND LOWER BOUNDS OF THE ATTRACTOR DIMENSION FOR 3D DAMPED EULER–BARDINA EQUATIONS ALEXEI ILYIN1, ANNA KOSTIANKO3,4, AND SERGEY ZELIK1,2,3 Abstract. The dependence of the fractal dimension of global attrac- tors for the damped 3D Euler–Bardina equations on the regula... | 2021-06-16 | The dependence of the fractal dimension of global attractors for the damped
3D Euler--Bardina equations on the regularization parameter $\alpha>0$ and
Ekman damping coefficient $\gamma>0$ is studied. We present explicit upper
bounds for this dimension for the case of the whole space, periodic boundary
conditions, and t... | Sharp upper and lower bounds of the attractor dimension for 3D damped Euler-Bardina equations | 2106.09077v1 |
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