publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2017-09-12 | Direct observation of magnon-phonon coupling in yttrium iron garnet | The magnetic insulator yttrium iron garnet (YIG) with a ferrimagnetic
transition temperature of $\sim$560 K has been widely used in microwave and
spintronic devices. Anomalous features in the spin Seeback effect (SSE)
voltages have been observed in Pt/YIG and attributed to the magnon-phonon
coupling. Here we use inelas... | 1709.03940v1 |
2018-10-11 | Propagating spin waves in nanometer-thick yttrium iron garnet films: Dependence on wave vector, magnetic field strength and angle | We present a comprehensive investigation of propagating spin waves in
nanometer-thick yttrium iron garnet (YIG) films. We use broadband spin-wave
spectroscopy with integrated coplanar waveguides (CPWs) and microstrip antennas
on top of continuous and patterned YIG films to characterize spin waves with
wave vectors up t... | 1810.04973v1 |
2020-09-26 | Bose condensation and spin superfluidity of magnons in a perpendicularly magnetized film of yttrium iron garnet | The formation of a Bose condensate of magnons in a perpendicularly magnetized
film of yttrium iron garnet under radio-frequency pumping in a strip line is
studied experimentally. The characteristics of nonlinear magnetic resonance and
the spatial distribution of the Bose condensate of magnons in the magnetic
field grad... | 2009.12595v1 |
2020-12-17 | Magnetic equivalent of electric superradiance: radiative damping in yttrium-iron-garnet films | A dense system of independent oscillators, connected only by their
interaction with the same cavity excitation mode, will radiate coherently,
which effect is termed superradiance. In several cases, especially if the
density of oscillators is high, the superradiance may dominate the intrinsic
relaxation processes. This ... | 2012.09440v1 |
2021-03-16 | Spin-Phonon Interaction in Yttrium Iron Garnet | Spin-phonon interaction is an important channel for spin and energy
relaxation in magnetic insulators. Understanding this interaction is critical
for developing magnetic insulator-based spintronic devices. Quantifying this
interaction in yttrium iron garnet (YIG), one of the most extensively
investigated magnetic insul... | 2103.09038v1 |
2022-02-07 | Spin-transfer-assisted parametric pumping of magnons in yttrium iron garnet | The combination of parametric pumping and spin-transfer torque is a powerful
approach that enables high-level control over magnetic excitations in thin-film
ferromagnets. The excitation parameters, such as pumping power and external
field strength, affect the instabilities of individual magnon modes. We
theoretically e... | 2202.03247v2 |
2022-08-23 | Reversal of nanomagnets by propagating magnons in ferrimagnetic yttrium iron garnet enabling nonvolatile magnon memory | Despite the unprecedented downscaling of CMOS integrated circuits,
memory-intensive machine learning and artificial intelligence applications are
limited by data conversion between memory and processor. There is a challenging
quest for novel approaches to overcome this so-called von Neumann bottleneck.
Magnons are the ... | 2208.10923v1 |
2023-06-24 | Ferromagnetic levitation and harmonic trapping of a milligram-scale Yttrium Iron Garnet sphere | We report passive magnetic levitation and three-dimensional harmonic trapping
of a 0.3 milligram, 0.5 millimeter diameter Yttrium Iron Garnet sphere at 4 K.
The gradient of an external magnetic field is used for vertical trapping, while
the finite size effect of the diamagnetic effect is used for horizontal
trapping. T... | 2306.13917v2 |
2023-12-14 | Magnetization Reversal of 50-nm-wide Ni81Fe19 Nanostripes by Ultrashort Magnons in Yttrium Iron Garnet for Memory-Enhanced Magnonic Circuits | Spin waves (magnons) can enable wave-based neuromorphic computing by which
one aims at overcoming limitations inherent to conventional electronics and the
von Neumann architecture. In this study, we explore the storage of magnon
signals and the magnetization switching of periodic and aperiodic arrays of
Ni81Fe19 (Py) n... | 2312.09177v1 |
2024-02-07 | Broadband squeezed light field by magnetostriction in an opto-magnomechanical | We present a novel mechanism for generating a wide bandwidth squeezed optical
output field in an opto-magnomechanical system. In this system, the magnon
(mechanical) mode in the yttrium-iron-garnet crystal is coupled to the
microwave field (optical field) through magnetic dipole (radiation pressure)
interaction. The ma... | 2402.04983v1 |
2009-03-17 | Microscopic spin-wave theory for yttrium-iron garnet films | Motivated by recent experiments on thin films of the ferromagnetic insulator
yttrium-iron garnet (YIG), we have developed an efficient microscopic approach
to calculate the spin-wave spectra of these systems. We model the
experimentally relevant magnon band of YIG using an effective quantum
Heisenberg model on a cubic ... | 0903.2847v2 |
2012-06-28 | Thermalization of magnons in yttrium-iron garnet: nonequilibrium functional renormalization group approach | Using a nonequilibrium functional renormalization group (FRG) approach we
calculate the time evolution of the momentum distribution of a magnon gas in
contact with a thermal phonon bath. As a cutoff for the FRG procedure we use a
hybridization parameter {\Lambda} giving rise to an artificial damping of the
phonons. Wit... | 1206.6689v3 |
2013-02-25 | Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film | Recently, magnons, which are quasiparticles describing the collective motion
of spins, were found to undergo Bose-Einstein condensation (BEC) at room
temperature in films of Yttrium Iron Garnet (YIG). Unlike other quasiparticle
BEC systems, this system has a spectrum with two degenerate minima, which makes
it possible ... | 1302.6128v1 |
2013-02-27 | Specific heat and thermal conductivity of ferromagnetic magnons in Yttrium Iron Garnet | The specific heat and thermal conductivity of the insulating ferrimagnet
Y$_3$Fe$_5$O$_{12}$ (Yttrium Iron Garnet, YIG) single crystal were measured
down to 50 mK. The ferromagnetic magnon specific heat $C$$_m$ shows a
characteristic $T^{1.5}$ dependence down to 0.77 K. Below 0.77 K, a downward
deviation is observed, w... | 1302.6739v1 |
2013-06-18 | Magnon, phonon and electron temperature profiles and the spin Seebeck effect in magnetic insulator/normal metal hybrid structures | We calculate the phonon, electron and magnon temperature profiles in yttrium
iron garnet/platinum bilayers by diffusive theory with appropriate boundary
conditions, in particular taking into account interfacial thermal resistances.
Our calculations show that in thin film hybrids, the interface magnetic heat
conductance... | 1306.4292v2 |
2014-04-14 | Sign of inverse spin Hall voltages generated by ferromagnetic resonance and temperature gradients in yttrium iron garnet|platinum bilayers | We carried out a concerted effort to determine the absolute sign of the
inverse spin Hall effect voltage generated by spin currents injected into a
normal metal. We focus on yttrium iron garnet (YIG)|platinum bilayers at room
temperature, generating spin currents by microwaves and temperature gradients.
We find consist... | 1404.3490v2 |
2014-12-12 | Spin waves in micro-structured yttrium iron garnet nanometer-thick films | 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... | 1412.4032v1 |
2015-02-24 | High Quality Yttrium Iron Garnet Grown by Room Temperature Pulsed Laser Deposition and Subsequent Annealing | We have investigated recrystallization of amorphous Yttrium Iron Garnet (YIG)
by annealing in oxygen atmosphere. Our findings show that well below the
melting temperature the material transforms into a fully epitaxial layer with
exceptional quality, both structural and magnetic.\\ In ferromagnetic resonance
(FMR) ultra... | 1502.06724v2 |
2015-04-03 | The effect of the magnon dispersion on the longitudinal spin Seebeck effect in yttrium iron garnets (YIG) | We study the temperature dependence of the longitudinal spin-Seebeck effect
(LSSE) in a yttrium iron garnet Y3Fe5O12 (YIG) / Pt system for samples of
different thicknesses. In this system, the thermal spin torque is
magnon-driven. The LSSE signal peaks at a specific temperature that depends on
the YIG sample thickness.... | 1504.00895v1 |
2015-12-04 | Magnetic field dependence of the magnon spin diffusion length in the magnetic insulator yttrium iron garnet | We investigated the effect of an external magnetic field on the diffusive
spin transport by magnons in the magnetic insulator yttrium iron garnet (YIG),
using a non-local magnon transport measurement geometry. We observed a decrease
in magnon spin diffusion length $\lambda_m$ for increasing field strengths,
where $\lam... | 1512.01410v1 |
2016-01-27 | Observation of magnon-mediated current drag in Pt/yttrium iron garnet/Pt(Ta) trilayers | Pure spin current, a flow of spin angular momentum without flow of any
companying net charge, is generated in two common ways. One makes use of the
spin Hall effect in normal metals (NM) with strong spin-orbit coupling, such as
Pt or Ta. The other utilizes the collective motion of magnetic moments or spin
waves with th... | 1601.07429v1 |
2016-03-31 | Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states | Spin-momentum locking in protected surface states enables efficient
electrical detection of magnon decay at a
magnetic-insulator/topological-insulator heterojunction. Here we demonstrate
this property using the spin Seebeck effect, i.e. measuring the transverse
thermoelectric response to a temperature gradient across a... | 1603.09427v1 |
2016-08-03 | Influence of yttrium iron garnet thickness and heater opacity on the nonlocal transport of electrically and thermally excited magnons | We studied the nonlocal transport behavior of both electrically and thermally
excited magnons in yttrium iron garnet (YIG) as a function of its thickness.
For electrically injected magnons, the nonlocal signals decrease monotonically
as the YIG thickness increases. For the nonlocal behavior of the thermally
generated m... | 1608.01178v1 |
2016-12-06 | Increased low-temperature damping in yttrium iron garnet thin films | We report measurements of the frequency and temperature dependence of
ferromagnetic resonance (FMR) for a 15-nm-thick yttrium iron garnet (YIG) film
grown by off-axis sputtering. Although the FMR linewidth is narrow at room
temperature (corresponding to a damping coefficient $\alpha$ = (9.0 $\pm$ 0.2)
$\times 10^{-4}$)... | 1612.01954v1 |
2017-03-16 | Optical properties of a four-layer waveguiding nanocomposite structure in near-IR regime | The theoretical study of the optical properties of TE- and TM- modes in a
four-layer structure composed of the magneto-optical yttrium iron garnet
guiding layer on a dielectric substrate covered by planar nanocomposite guiding
multilayer is presented. The dispersion equation is obtained taking into
account the bigyrotr... | 1703.05711v1 |
2017-03-28 | Temperature dependent magnetic damping of yttrium iron garnet spheres | We investigate the temperature dependent microwave absorption spectrum of an
yttrium iron garnet sphere as a function of temperature (5 K to 300 K) and
frequency (3 GHz to 43.5 GHz). At temperatures above 100 K, the magnetic
resonance linewidth increases linearly with temperature and shows a
Gilbert-like linear frequen... | 1703.09444v2 |
2017-04-28 | Thermal Control of the Magnon-Photon Coupling in a Notch Filter coupled to a Yttrium-Iron-Garnet/Platinum System | We report thermal control of mode hybridization between the ferromagnetic
resonance (FMR) and a planar resonator (notch filter) working at 4.74 GHz. The
chosen magnetic material is a ferrimagnetic insulator (Yttrium Iron Garnet:
YIG) covered by 6 nm of platinum (Pt). A current induced heating method has
been used in or... | 1704.08896v3 |
2017-10-07 | Magnon-phonon relaxation in yttrium iron garnet from first principles | We combine the theoretical method of calculating spin wave excitation with
the finite-temperature modeling and calculate the magnon-phonon relaxation time
in the technologically important material Yttrium iron garnet (YIG) from first
principles. The finite lifetime of magnon excitation is found to arise from the
fluctu... | 1710.02647v1 |
2018-03-13 | Spin wave localization and guiding by magnon band structure engineering in yttrium iron garnet | In spintronics the propagation of spin-wave excitations in magnetically
ordered materials can also be used to transport and process information. One of
the most popular materials in this regard is the ferrimagnetic insulator
yttrium-iron-garnet due its exceptionally small spin-wave damping parameter.
While the small re... | 1803.04943v3 |
2019-03-03 | Four-layer nanocomposite structure as an effective optical waveguide switcher for near-IR regime | We present a theoretical study of the dispersion and energy properties of the
eigenwaves (TE- and TM- modes) in a four-layer structure composed of a
magneto-optical yttrium iron garnet guiding layer on a dielectric substrate
covered by a planar nanocomposite guiding multilayer. The bigyrotropic
properties of yttrium-ir... | 1903.00854v1 |
2019-11-12 | Parametric generation of propagating spin-waves in ultra thin yttrium iron garnet waveguides | We present the experimental demonstration of the parallel parametric
generation of spin-waves in a microscaled yttrium iron garnet waveguide with
nanoscale thickness. Using Brillouin light scattering microscopy, we observe
the excitation of the first and second waveguide modes generated by a stripline
microwave pumping... | 1911.04926v2 |
2020-04-20 | Ultra Thin Films of Yttrium Iron Garnet with Very Low Damping: A Review | Thin Yttrium Iron Garnet (YIG) is a promising material for integrated
magnonics. In order to introduce YIG into nanofabrication processes it is
necessary to fabricate very thin YIG films with a thickness well below 100 nm
while retaining the extraordinary magnetic properties of the material,
especially its long magnon ... | 2004.09094v1 |
2020-05-08 | Observation of terahertz magnon of Kaplan-Kittel exchange resonance in yttrium-iron garnet by Raman spectroscopy | Backscattering Raman spectroscopic investigations were performed on an
yttrium-iron garnet single crystal using linearly and circularly polarized
light. A terahertz (THz) magnon of the Kaplan-Kittel (KK) exchange resonance
was discovered, which had been regarded as unobservable via optical methods.
The KK exchange reso... | 2005.03852v2 |
2021-03-12 | Double accumulation and anisotropic transport of magneto-elastic bosons in yttrium iron garnet films | Interaction between quasiparticles of a different nature, such as magnons and
phonons in a magnetic medium, leads to the mixing of their properties and the
formation of hybrid states in the areas of intersection of individual spectral
branches. We recently reported the discovery of a new phenomenon mediated by
the magn... | 2103.07338v1 |
2021-07-12 | Origin of Perpendicular Magnetic Anisotropy in Yttrium Iron Garnet Thin Films Grown on Si (100) | We report the magnetic properties of yttrium iron garnet (YIG) thin films
grown by pulsed laser deposition technique. The films were deposited on Si
(100) substrates in the range of 15-50 nm thickness. Magnetic characterizations
were investigated by ferromagnetic resonance spectra. Perpendicular magnetic
easy axis was ... | 2107.05591v1 |
2021-12-30 | Giant magnon spin conductivity approaching the two-dimensional transport regime in ultrathin yttrium iron garnet films | Conductivities are key material parameters that govern various types of
transport (electronic charge, spin, heat etc.) driven by thermodynamic forces.
Magnons, the elementary excitations of the magnetic order, flow under the
gradient of a magnon chemical potential in proportion to a magnon (spin)
conductivity $\sigma_{... | 2112.15165v3 |
2022-01-22 | Dissipative generation of significant amount of photon-phonon asymmetric steering in magnomechanical interfaces | We propose an effective approach for generating significant amount of
entanglement and asymmetric steering between photon and phonon in a cavity
magnomechanical system which consists of a microwave cavity and a yttrium iron
garnet sphere. By driving the magnon mode of the yttrium iron garnet sphere
with blue-detuned mi... | 2201.08965v1 |
2023-08-01 | Crystallization Dynamics of Amorphous Yttrium Iron Garnet Thin Films | Yttrium iron garnet (YIG) is a prototypical material in spintronics due to
its exceptional magnetic properties. To exploit these properties high quality
thin films need to be manufactured. Deposition techniques like sputter
deposition or pulsed laser deposition at ambient temperature produce amorphous
films, which need... | 2308.00412v1 |
2017-11-20 | Temperature dependent relaxation of dipole-exchange magnons in yttrium iron garnet films | Low energy consumption enabled by charge-free information transport, which is
free from ohmic heating, and the ability to process phase-encoded data by
nanometer-sized interference devices at GHz and THz frequencies are just a few
benefits of spin-wave-based technologies. Moreover, when approaching cryogenic
temperatur... | 1711.07517v1 |
2019-03-22 | Effects of post-deposition annealing on the structure and magnetization of PLD grown Yttrium Iron Garnet films | We report on the recrystallization of 200 nm thick as-grown Yttrium Iron
Garnet (Y_3.4 Fe_4.6 O_12) films on (111) face of Gadolinium Gallium Garnet
(GGG) single crystals by post-deposition annealing. Epitaxial conversion of the
as-grown microcrystalline YIG films was seen after annealing at 800oC for more
than 30 minu... | 1903.09457v1 |
2014-01-20 | On the theory of inhomogeneous Bose-Einstein condensation of magnons in yttrium garnet | The Bose-Einstein condensation (BEC) of magnons created by a strong pumping
in ferromagnetic thin films of yttrium iron garnet used as systems of finite
size is considered analytically. Such a peculiarity, typical for this magnetic
material, as the presence of a minimum in the spectrum of spin waves at a
finite value o... | 1401.4854v1 |
2016-05-30 | An integrated approach to doped thin films with strain tunable magnetic anisotropy: Powder synthesis, target preparation and pulsed laser deposition of Bi:YIG | We present a synthesis/processing method for fabricating ferrimagnetic
insulator (Bi-doped yttrium iron garnet) thin films with tunable magnetic
anisotropy. Since the desired magnetic properties rely on controllable
thickness and successful doping, we pay attention to the entire
synthesis/processing procedure (nanopowd... | 1605.09084v2 |
2017-03-26 | Unexpected structural and magnetic depth dependence of YIG thin films | We report measurements on yttrium iron garnet (YIG) thin films grown on both
gadolinium gallium garnet (GGG) and yttrium aluminium garnet (YAG) substrates,
with and without thin Pt top layers. We provide three principal results: the
observation of an interfacial region at the Pt/YIG interface, we place a limit
on the i... | 1703.08752v1 |
2020-01-09 | Bismuth iron garnet: ab initio study of electronic properties | Bismuth iron garnet (BIG), i.e. Bi3Fe5O12, is a strong ferrimagnet that also
possess outstanding magneto-optical properties such as the largest known
Faraday rotation. These properties are related with the distribution of
magnetic moments on octahedral and tetrahedral sites, the presence of spin gaps
in the density of ... | 2001.02910v1 |
2018-11-29 | Structural and Magnetic Study of Metallo-Organic YIG Powder Using 2-ethylhexanoate Carboxylate Based Precursors | The crystallization and magnetic behavior of yttrium iron garnet (YIG)
prepared by metallo-organic decomposition (MOD) method are discussed. The
chemistry and physics related to synthesis of iron and yttrium carboxylates
based on 2-ethylhexanoic acid (2EHA) are studied, since no literature was found
which elucidates sy... | 1811.12514v1 |
1997-03-26 | Stochastic Resonance in Chaotic Spin-Wave Dynamics | We report the first experimental observation of noise-free stochastic
resonance by utilizing the intrinsic chaotic dynamics of the system. To this
end we have investigated the effect of an external periodic modulation on
intermittent signals observed by high power ferromagnetic resonance in yttrium
iron garnet spheres.... | 9703018v1 |
2004-11-28 | Generation of spin-wave dark solitons with phase engineering | We generate experimentally spin-wave envelope dark solitons from rectangular
high-frequency dark input pulses with externally introduced phase shifts in
yttrium-iron garnet magnetic fims. We observe the generation of both odd and
even numbers of magnetic dark solitons when the external phase shift varies.
The experimen... | 0411056v1 |
2008-05-27 | Scattering of backward spin waves in a one-dimensional magnonic crystal | Scattering of backward volume magnetostatic spin waves from a one-dimensional
magnonic crystal, realized by a grating of shallow grooves etched into the
surface of an yttrium-iron garnet film, was experimentally studied. Rejection
frequency bands were clearly observed. The rejection efficiency and the
frequency width o... | 0805.4142v1 |
2008-09-19 | Polarization proximity effect in isolator crystal pairs | We experimentally studied the polarization dynamics (orientation and
ellipticity) of near infrared light transmitted through magnetooptic Yttrium
Iron Garnet crystal pairs using a modified balanced detection scheme. When the
pair separation is in the sub-millimeter range, we observed a proximity effect
in which the sat... | 0809.3292v1 |
2008-10-22 | Probing of a parametrically pumped magnon gas with a non-resonant packet of traveling spin waves | The magnon gas created by spatially localized longitudinal parametric pumping
in an yttrium-iron-garnet film is probed by a traveling packet of spin waves
non-resonant with the pumping field. The analysis of the influence of the
magnon gas on the amplitude and phase of the propagating spin waves allows to
determine cha... | 0810.4033v1 |
2009-01-13 | Refractive index and Snell's Law for Dipolar-Exchange Spin-Waves in a Confined Planar Structure | We derived the analytical forms of refractive index and Snell law for
dipolar-exchange spin waves of reflection and refraction at a magnetically
heterogeneous interface in a geometrically confined planer structure composed
of different magnetic thin films from a microscopic scattering approach. A
novel behavior, the op... | 0901.1700v2 |
2009-03-02 | Magnetooptical control of light collapse in bulk Kerr media | Magneto-optical crystals allow an efficient control of the birefringence of
light via the Cotton-Mouton and Faraday effects. These effects enable a unique
combination of adjustable linear and circular birefringence, which, in turn,
can affect the propagation of light in nonlinear Kerr media. We show
numerically that th... | 0903.0373v1 |
2010-10-12 | Linear-response theory of spin Seebeck effect in ferromagnetic insulators | We formulate a linear response theory of the spin Seebeck effect, i.e., a
spin voltage generation from heat current flowing in a ferromagnet. Our
approach focuses on the collective magnetic excitation of spins, i.e., magnons.
We show that the linear-response formulation provides us with a qualitative as
well as quantit... | 1010.2325v2 |
2011-03-19 | Spin transfer torque on magnetic insulators | Recent experimental and theoretical studies focus on spin-mediated heat
currents at interfaces between normal metals and magnetic insulators. We
resolve conflicting estimates for the order of magnitude of the spin transfer
torque by first-principles calculations. The spin mixing conductance
G^\uparrow\downarrow of the ... | 1103.3764v2 |
2011-06-16 | Thermomagnonic spin transfer and Peltier effects in insulating magnets | We study the coupled magnon energy transport and collective magnetization
dynamics in ferromagnets with magnetic textures. By constructing a
phenomenological theory based on irreversible thermodynamics, we describe
motion of domain walls by thermal gradients and generation of heat flows by
magnetization dynamics. From ... | 1106.3135v2 |
2011-07-06 | Spin Seebeck Effect: Amplification of Spin Waves by Thermal Torque | We observe amplification of spin-wave packets propagating along a film of
yttrium iron garnet (YIG) subject to a transverse temperature gradient. The
amplification is attributed to a spin-transfer thermal torque created by spin
currents generated by means of the spin Seebeck effect that acts on the
magnetization and op... | 1107.1271v2 |
2012-04-18 | Domain wall heat conductance in ferromagnetic wires | We present a theoretical study of heat transport in electrically insulating
ferromagnetic wires containing a domain wall. In the regime of validity of
continuum micromagnetism a domain wall is found to have no effect on the heat
conductance. However, spin waves are found to be reflected by domain walls with
widths of a... | 1204.4008v2 |
2013-09-11 | Nanomechanical AC Susceptometry of an Individual Mesoscopic Ferrimagnet | A novel method for simultaneous detection of both DC and time-dependent
magnetic signatures in individual mesoscopic structures has emerged from early
studies in spin mechanics. Multifrequency nanomechanical detection of AC
susceptibility and its harmonics highlights reversible nonlinearities in the
magnetization respo... | 1309.2965v1 |
2013-11-12 | Nonreciprocity engineering in magnetostatic spin waves | Magnetostatic surface spin waves (MSSW) excited from a coplanar waveguide
antenna travel in different directions with different amplitudes. This effect,
called nonreciprocity of MSSW, has been investigated by micromagnetic
simulations. The ratio of amplitude of two counter propagating spin waves, the
nonreciprocity par... | 1311.2686v1 |
2014-04-09 | Current-induced spin torque resonance of magnetic insulators | We formulate a theory of the AC spin Hall magnetoresistance (SMR) in a
bilayer system consisting of a magnetic insulator such as yttrium iron garnet
(YIG) and a heavy metal such as platinum (Pt). We derive expressions for the DC
voltage generation based on the drift-diffusion spin model and quantum
mechanical boundary ... | 1404.2360v2 |
2014-10-05 | Planar Hall effect in Y3Fe5O12(YIG)/IrMn films | The planar Hall effect of IrMn on an yttrium iron garnet (YIG = Y3Fe5O12) was
measured in the magnetic field rotating in the film plane. The magnetic field
angle dependence of planar Hall resistance (PHR) has been observed in YIG/IrMn
bilayer at different temperatures, while the GGG/IrMn (GGG= Gd3Ga5O12) shows
constant... | 1410.1112v1 |
2014-10-07 | Influence of interface condition on spin-Seebeck effects | The longitudinal spin-Seebeck effect (LSSE) has been investigated for
Pt/yttrium iron garnet (YIG) bilayer systems. The magnitude of the voltage
induced by the LSSE is found to be sensitive to the Pt/YIG interface condition.
We observed large LSSE voltage in a Pt/YIG system with a better crystalline
interface, while th... | 1410.1655v1 |
2014-12-03 | Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect | We demonstrate the anomalous Hall effect (AHE) in single-layer graphene
exchange-coupled to an atomically flat yttrium iron garnet (YIG) ferromagnetic
thin film. The anomalous Hall conductance has magnitude of ~0.09(2e2/h) at low
temperatures and is measurable up to ~ 300 K. Our observations indicate not
only proximity... | 1412.1521v1 |
2015-03-09 | Magnetic spheres in microwave cavities | We apply Mie scattering theory to study the interaction of magnetic spheres
with microwaves in cavities beyond the magnetostatic and rotating wave
approximations. We demonstrate that both strong and ultra-strong coupling can
be realized for a stand alone magnetic spheres made from yttrium iron garnet
(YIG), acting as a... | 1503.02419v2 |
2015-06-09 | Identification of spin wave modes strongly coupled to a co-axial cavity | We demonstrate, at room temperature, the strong coupling of the fundamental
and non-uniform magnetostatic modes of an yttrium iron garnet (YIG)
ferrimagnetic sphere to the electromagnetic modes of a co-axial cavity. The
well-defined field profile within the cavity yields a specific coupling
strength for each magnetosta... | 1506.02902v1 |
2015-06-18 | Dispersive read-out of ferromagnetic resonance for strongly coupled magnons and microwave photons | We demonstrate the dispersive measurement of ferromagnetic resonance in a
yttrium iron garnet sphere embedded within a microwave cavity. The reduction in
the longitudinal magnetization at resonance is measured as a frequency shift in
the cavity mode coupled to the sphere. This measurement is a result of the
intrinsic n... | 1506.05631v1 |
2015-10-22 | Magneto-optical coupling in whispering gallery mode resonators | We demonstrate that yttrium iron garnet microspheres support optical
whispering gallery modes similar to those in non-magnetic dielectric materials.
The direction of the ferromagnetic moment tunes both the resonant frequency via
the Voigt effect as well as the degree of polarization rotation via the Faraday
effect. An ... | 1510.06661v2 |
2016-07-16 | Comment on "Supercurrent in a room temperature Bose-Einstein magnon condensate" | The comment explains that the preprint arXiv:1503.0042 has not presented
persuasive theoretical or experimental arguments of existence of spin
supercurrents in a magnon condensate prepared in a room temperature
yttrium-iron-garnet magnetic film because the authors did not check known
criteria for existence of spin supe... | 1607.04720v2 |
2016-11-28 | Berry curvature in magnon-phonon hybrid systems | We theoretically study the Berry curvature of the magnon induced by the
hybridization with the acoustic phonons via the spin-orbit and dipolar
interactions. We first discuss the magnon-phonon hybridization via the dipolar
interaction, and show that the dispersions have gapless points in momentum
space, some of which fo... | 1611.08993v1 |
2018-04-19 | Damping of magnetization dynamics by phonon pumping | 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")... | 1804.07080v2 |
2019-06-03 | Magnon-phonon interactions in magnetic insulators | We address the theory of magnon-phonon interactions and compute the
corresponding quasi-particle and transport lifetimes in magnetic insulators
with focus on yttrium iron garnet at intermediate temperatures from anisotropy-
and exchange-mediated magnon-phonon interactions, the latter being derived from
the volume depen... | 1906.01042v1 |
2019-11-12 | Coherent pumping of high momentum magnons by light | We propose to excite a large number of coherent magnons with high momentum in
optical cavities. This is achieved by two counterpropagating optical modes that
are detuned by the frequency of a selected magnon, similar to stimulated Raman
scattering. In sub-mm size yttrium iron garnet spheres, a mW laser input power
gene... | 1911.04728v1 |
2020-09-22 | From Chaotic Spin Dynamics to Non-collinear Spin Textures in YIG Nano-films by Spin Current Injection | In this article I report about a numerical investigation of nonlinear spin
dynamics in a magnetic thin-film, made of Yttrium-Iron-Garnet (YIG). This film
is exposed to a small in-plane oriented magnetic field, and strong spin
currents. The rich variety of findings encompass dynamic regimes hosting
localized, non-propag... | 2009.10628v1 |
2021-02-22 | A review of modelling in ferrimagnetic spintronics | In this review we introduce computer modelling and simulation techniques
which are used for ferrimagnetic materials. We focus on models where thermal
effects are accounted for, atomistic spin dynamics and finite temperature
macrospin approaches. We survey the literature of two of the most commonly
modelled ferrimagnets... | 2102.11004v1 |
2021-06-10 | QNMnonreciprocal_resonators: an openly available toolbox for computing the QuasiNormal Modes of nonreciprocal resonators | QNMnonreciprocal_resonators is an extension (posted in 2021) of the QNMEig
solver of the freeware package MAN. It provides a comprehensive presentation of
the computation and normalization of electromagnetic quasinormal modes (QNMs)
of resonators composed of nonreciprocal materials. It features a theoretical
background... | 2106.05502v1 |
2023-01-14 | Quantum entanglement generation on magnons assisted with microwave cavities coupled to a superconducting qubit | We present protocols to generate quantum entanglement on nonlocal magnons in
hybrid systems composed of yttrium iron garnet (YIG) spheres, microwave
cavities and a superconducting (SC) qubit. In the schemes, the YIGs are coupled
to respective microwave cavities in resonant way, and the SC qubit is placed at
the center ... | 2301.05820v1 |
2023-01-24 | Direct observation of magnon BEC in an out-of-plane magnetized yttrium iron garnet film | Bose-Einstain condensation occurs at an appropriate density of bosonic
particles, depending on their mass and temperature. We were able to
experimentally observe the transition from the spin wave regime to the magnon
Bose-Einstein condensed state (mBEC) with increasing magnon density by a
microwave pumping. We used opt... | 2301.10725v1 |
2023-02-17 | Control of magnon-photon coupling by spin torque | We demonstrate the influence of damping and field-like torques in the
magnon-photon coupling process by classically integrating the generalized
Landau-Lifshitz-Gilbert equation with RLC equation in which a phase correlation
between dynamic magnetization and microwave current through combined Amp\`ere
and Faraday effect... | 2302.08910v1 |
2023-05-11 | Correlation-enhanced interaction of a Bose-Einstein condensate with parametric magnon pairs and virtual magnons | Nonlinear interactions are crucial in science and engineering. Here, we
investigate wave interactions in a highly nonlinear magnetic system driven by
parametric pumping leading to Bose--Einstein condensation of spin-wave quanta
-- magnons. Using Brillouin light scattering spectroscopy in yttrium-iron
garnet films, we f... | 2305.06896v1 |
2023-12-05 | Interplay between magnetism and superconductivity in a hybrid magnon-photon bilayer system | Spin waves in magnetic films are affected by the vicinity to a
superconductor. Here we studied a bilayer stack made of an insulating Yttrium
Iron Garnet (YIG) film and a high-$T_c$ YBCO superconducting planar resonator.
We investigated the hybridization of magnon and photon modes reporting the
temperature evolution of ... | 2312.02785v2 |
2015-06-19 | All electrical coherent control of the magnetization in thin Yittrium Iron Garnet film | We demonstrate coherent control of time domain ferromagnetic resonance by all
electrical excitation and detection. Using two ultrashort magnetic field steps
with variable time delay we control the induction decay in yttrium iron garnet
(YIG). By setting suitable delay times between the two steps the precession of
the m... | 1506.05935v1 |
2017-06-11 | Magnetization spin dynamics in a (LuBi)3Fe5O12 (BLIG) epitaxial film | Bismuth substituted lutetium iron garnet (BLIG) films exhibit larger Faraday
rotation, and have a higher Curie temperature than yttrium iron garnet. We have
observed magnetic stripe domains and measured domain widths of 1.4 {\mu}{\mu}m
using Fourier domain polarization microscopy, Faraday rotation experiments
yield a c... | 1706.03340v1 |
2004-05-26 | Microwave Magnetoelectric Effects in Single Crystal Bilayers of Yttrium Iron Garnet and Lead Magnesium Niobate-Lead Titanate | The first observation of microwave magnetoelectric (ME) interactions through
ferromagnetic resonance (FMR) in bilayers of single crystal
ferromagnetic-piezoelectric oxides and a theoretical model for the effect are
presented. An electric field E produces a mechanical deformation in the
piezoelectric phase, resulting in... | 0405622v1 |
2015-12-03 | Cavity quantum electrodynamics with ferromagnetic magnons in a small yttrium-iron-garnet sphere | Hybridizing collective spin excitations and a cavity with high cooperativity
provides a new research subject in the field of cavity quantum electrodynamics
and can also have potential applications to quantum information. Here we report
an experimental study of cavity quantum electrodynamics with ferromagnetic
magnons i... | 1512.00983v1 |
2016-08-29 | Sub-micrometer yttrium iron garnet LPE films with low ferromagnetic resonance losses | Using liquid phase epitaxy (LPE) technique (111) yttrium iron garnet (YIG)
films with thicknesses of ~100 nm and surface roughnesses as low as 0.3 nm have
been grown as a basic material for spin-wave propagation experiments in
microstructured waveguides. The continuously strained films exhibit nearly
perfect crystallin... | 1608.08043v1 |
2017-05-05 | Thermographic measurements of the spin Peltier effect in metal/yttrium-iron-garnet junction systems | The spin Peltier effect (SPE), heat-current generation due to spin-current
injection, in various metal (Pt, W, and Au single layers and Pt/Cu
bilayer)/ferrimagnetic insulator (yttrium iron garnet: YIG) junction systems
has been investigated by means of a lock-in thermography (LIT) method. The SPE
is excited by a spin c... | 1705.02094v1 |
2017-05-05 | Neutron-scattering study of yttrium iron garnet | The nuclear and magnetic structure and full magnon dispersions of yttrium
iron garnet Y$_3$Fe$_5$O$_{12}$ have been studied by neutron scattering. The
refined nuclear structure is distorted to a trigonal space group of $R\bar{3}$.
The highest-energy dispersion extends up to 86 meV. The observed dispersions
are reproduc... | 1705.02167v5 |
2017-06-14 | Nonlocal magnon-polaron transport in yttrium iron garnet | The spin Seebeck effect (SSE) is observed in magnetic insulator|heavy metal
bilayers as an inverse spin Hall effect voltage under a temperature gradient.
The SSE can be detected nonlocally as well, viz. in terms of the voltage in a
second metallic contact (detector) on the magnetic film, spatially separated
from the fi... | 1706.04373v1 |
2018-02-09 | Monocrystalline free standing 3D yttrium iron garnet magnon nano resonators | Nano resonators in which mechanical vibrations and spin waves can be coupled
are an intriguing concept that can be used in quantum information processing to
transfer information between different states of excitation. Until now, the
fabrication of free standing magnetic nanostructures which host long lived spin
wave ex... | 1802.03176v2 |
2018-02-26 | Spin Seebeck effect and ballistic transport of quasi-acoustic magnons in room-temperature yttrium iron garnet films | We studied the transient behavior of the spin current generated by the
longitudinal spin Seebeck effect (LSSE) in a set of platinum-coated yttrium
iron garnet (YIG) films of different thicknesses. The LSSE was induced by means
of pulsed microwave heating of the Pt layer and the spin currents were measured
electrically ... | 1802.09593v1 |
2018-03-30 | Nonlocal magnon spin transport in yttrium iron garnet with tantalum and platinum spin injection/detection electrodes | We study the magnon spin transport in the magnetic insulator yttrium iron
garnet (YIG) in a nonlocal experiment and compare the magnon spin excitation
and detection for the heavy metal paramagnetic electrodes platinum (Pt|YIG|Pt)
and tantalum (Ta|YIG|Ta). The electrical injection and detection processes rely
on the (in... | 1803.11382v1 |
2019-01-28 | Spin Hall magnetoresistance in heterostructures consisting of noncrystalline paramagnetic YIG and Pt | The spin Hall magnetoresistance (SMR) effect arises from spin-transfer
processes across the interface between a spin Hall active metal and an
insulating magnet. While the SMR response of ferrimagnetic and
antiferromagnetic insulators has been studied extensively, the SMR of a
paramagnetic spin ensemble is not well esta... | 1901.09986v1 |
2019-10-19 | Propagation of spin-waves packets in individual nano-sized yttrium iron garnet magnonic conduits | Modern-days CMOS-based computation technology is reaching its fundamental
limitations. The emerging field of magnonics, which utilizes spin waves for
data transport and processing, proposes a promising path to overcome these
limitations. Different devices have been demonstrated recently on the macro-
and microscale, bu... | 1910.08801v2 |
2019-11-21 | Low damping and microstructural perfection of sub-40nm-thin yttrium iron garnet films grown by liquid phase epitaxy | 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... | 1911.09400v1 |
2021-06-29 | Neutron Scattering Study on Yttrium Iron Garnet for Spintronics | Spin current -- a flow of the spin degree of freedom in matter -- has vital
importance in spintronics. Propagation of the spin current ranges over a whole
momentum space; however, generated spin currents are mainly detected in the
long-wavelength limit. To facilitate practical uses of spintronics and
magnonics, microsc... | 2106.15752v1 |
2021-08-18 | Dispersionless propagation of ultra-short spin-wave pulses in ultrathin yttrium iron garnet waveguides | We study experimentally the propagation of nanosecond spin-wave pulses in
microscopic waveguides made of nanometer-thick yttrium iron garnet films. For
these studies, we use micro-focus Brillouin light scattering spectroscopy,
which provides the possibility to observe propagation of the pulses with high
spatial and tem... | 2108.08054v1 |
2021-09-10 | Electrical spectroscopy of the spin-wave dispersion and bistability in gallium-doped yttrium iron garnet | Yttrium iron garnet (YIG) is a magnetic insulator with record-low damping,
allowing spin-wave transport over macroscopic distances. Doping YIG with
gallium ions greatly reduces the demagnetizing field and introduces a
perpendicular magnetic anisotropy, which leads to an isotropic spin-wave
dispersion that facilitates s... | 2109.05045v1 |
2019-05-30 | Predicting New Iron Garnet Thin Films with Perpendicular Magnetic Anisotropy | Perpendicular magnetic anisotropy (PMA) is a necessary condition for many
spintronic applications like spin-orbit torques switching, logic and memory
devices. An important class of magnetic insulators with low Gilbert damping at
room temperature are iron garnets, which only have a few PMA types such as
terbium and sama... | 1905.13042v1 |
2017-04-10 | Patterned growth of crystalline Y$_{3}$Fe$_{5}$O$_{12}$ nanostructures with engineered magnetic shape anisotropy | We demonstrate patterned growth of epitaxial yttrium iron garnet (YIG) thin
films using lithographically defined templates on gadolinium gallium garnet
(GGG) substrates. The fabricated YIG nanostructures yield the desired
crystallographic orientation, excellent surface morphology, and narrow
ferromagnetic resonance (FM... | 1704.03056v2 |
2018-11-04 | Role of gallium diffusion in the formation of a magnetically dead layer at Y3Fe5O12 / Gd3Ga5O12 epitaxial interface | We have clarified the origin of magnetically dead interface layer formed in
yttrium iron garnet (YIG) films grown at above 700{\deg}C onto gadolinium
gallium garnet (GGG) substrate by means of laser molecular beam epitaxy. The
diffusion-assisted formation of a Ga-rich region at the YIG / GGG interface is
demonstrated b... | 1811.01321v2 |
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