publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2019-03-05 | Influence of misfit strain on the Goos-Hanchen shift upon reflection from a magnetic film on a nonmagnetic substrate | The influence of the misfit strain on the lateral shift (Goos-Hanchen effect)
experienced by a near-infrared electromagnetic wave upon reflection from the
surface of a bilayer consisting of a magnetic, gyrotropic (i.e., whose
permittivity tensor elements depend upon magnetization) yttrium-iron garnet
film deposited on ... | 1903.01948v1 |
2019-03-06 | Microwave magnon damping in YIG films at millikelvin temperatures | Magnon systems used in quantum devices require low damping if coherence is to
be maintained. The ferrimagnetic electrical insulator yttrium iron garnet (YIG)
has low magnon damping at room temperature and is a strong candidate to host
microwave magnon excitations in future quantum devices. Monocrystalline YIG
films are... | 1903.02527v3 |
2020-10-24 | Octave-Tunable Magnetostatic Wave YIG Resonators on a Chip | We have designed, fabricated, and characterized magnetostatic wave (MSW)
resonators on a chip. The resonators are fabricated by patterning
single-crystal yttrium iron garnet (YIG) film on a gadolinium gallium garnet
(GGG) substrate and excited by loop-inductor transducers. We achieved this
technology breakthrough by de... | 2010.12732v1 |
2020-11-26 | Optically-induced frequency up-conversion of the ferromagnetic resonance in an ultrathin garnet | We perform ultrafast pump-probe measurements on a nanometer-thick crystalline
Bi-doped yttrium iron garnet film with perpendicular magnetic anisotropy.
Tuning the photon energy of the pump laser pulses above and below the
material's bandgap, we trigger ultrafast optical and spin dynamics via both
one- and two-photon ab... | 2011.13403v1 |
2022-02-07 | Magnetization dynamics affected by phonon pumping | "Pumping" of phonons by a dynamic magnetization promises to extend the range
and functionality of magnonic devices. We explore the impact of phonon pumping
on room-temperature ferromagnetic resonance (FMR) spectra of bilayers of thin
yttrium iron garnet (YIG) films on thick gadolinium gallium garnet substrates
over a w... | 2202.03331v1 |
2022-11-15 | Nonlinear sub-switching regime of magnetization dynamics in photo-magnetic garnets | We analyze, both experimentally and numerically, the nonlinear regime of the
photo-induced coherent magnetization dynamics in cobalt-doped yttrium iron
garnet films. Photo-magnetic excitation with femtosecond laser pulses reveals a
strongly nonlinear response of the spin subsystem with a significant increase
of the eff... | 2211.08048v2 |
2023-12-17 | An Edge-Coupled Magnetostatic Bandpass Filter | This paper reports on the design, fabrication, and characterization of an
edge-coupled magnetostatic forward volume wave bandpass filter. Using
micromachining techniques, the filter is fabricated from a yttrium iron garnet
(YIG) film grown on a gadolinium gallium garnet (GGG) substrate with inductive
transducers. By ad... | 2312.10583v1 |
2023-12-17 | Cryogenic hybrid magnonic circuits based on spalled YIG thin films | Yttrium iron garnet (YIG) magnonics has sparked extensive research interests
toward harnessing magnons (quasiparticles of collective spin excitation) for
signal processing. In particular, YIG magnonics-based hybrid systems exhibit
great potentials for quantum information science because of their wide
frequency tunabili... | 2312.10660v2 |
2024-02-22 | Laser patterning of magnonic structure via local crystallization of Yittrium Iron Garnet | The fabrication and integration of high-quality structures of Yttrium Iron
Garnet (YIG) is critical for magnonics.Films with excellent properties are
obtained only on single crystal Gadolinium Gallium Garnet (GGG) substrates
using high-temperature processes. The subsequent realization of magnonic
structures via lithogr... | 2402.14444v1 |
2018-11-02 | Evidence for exchange Dirac gap in magneto-transport of topological insulator-magnetic insulator heterostructures | Transport signatures of exchange gap opening because of magnetic proximity
effect (MPE) are reported for bilayer structures of Bi2Se3 thin films on
yttrium iron garnet (YIG) and thulium iron garnet (TmIG) of perpendicular
magnetic anisotropy (PMA). Pronounced negative magnetoresistance (MR) was
detected, and attributed... | 1811.00689v1 |
2023-09-06 | Strong magnon-magnon coupling in an ultralow damping all-magnetic-insulator heterostructure | Magnetic insulators such as yttrium iron garnets (YIGs) are of paramount
importance for spin-wave or magnonic devices as their ultralow damping enables
ultralow power dissipation that is free of Joule heating, exotic magnon quantum
state, and coherent coupling to other wave excitations. Magnetic insulator
heterostructu... | 2309.03116v1 |
2019-05-02 | Anomalous spin Hall angle of a metallic ferromagnet determined by a multiterminal spin injection/detection device | We report on the determination of the anomalous spin Hall angle in the
ferromagnetic metal alloy cobalt-iron (Co$_{25}$Fe$_{75}$, CoFe). This is
accomplished by measuring the spin injection/detection efficiency in a
multiterminal device with nanowires of platinum (Pt) and CoFe deposited onto
the magnetic insulator yttr... | 1905.00663v1 |
2021-12-07 | Coupling function from bath density of states | Modelling of an open quantum system requires knowledge of parameters that
specify how it couples to its environment. However, beyond relaxation rates,
realistic parameters for specific environments and materials are rarely known.
Here we present a method of inferring the coupling between a generic system and
its bosoni... | 2112.04001v2 |
2012-05-18 | Thin film growth by pulsed laser deposition and properties of 122-type iron-based superconductor AE(Fe1--xCox)2As2 (AE = alkaline earth) | This paper reports comprehensive results on thin-film growth of 122-type
iron-pnictide superconductors, AE(Fe1-xCox)2As2 (AE = Ca, Sr, and Ba,
AEFe2As2:Co) by a pulsed laser deposition method using a neodymium-doped
yttrium aluminum garnet laser as an excitation source. The most critical
parameter to produce the SrFe2A... | 1205.4103v1 |
2017-11-01 | Tunable magnetization relaxation of Fe_{2}Cr_{1-x}Co_{x}Si half-metallic Heusler alloys by band structure engineering | We report a systematic investigation on the magnetization relaxation
properties of iron-based half-metallic Heusler alloy
Fe$_{2}$Cr$_{1-x}$Co_${x}$Si (FCCS) thin films using broadband angular-resolved
ferromagnetic resonance. Band structure engineering through Co doping (x)
demonstrated by first-principles calculation... | 1711.00406v1 |
2020-05-28 | A First Principle Study on Magneto-Optical Effects and Magnetism in Ferromagnetic Semiconductors Y$_3$Fe$_5$O$_{12}$ and Bi$_3$Fe$_5$O$_{12}$ | The magneto-optical (MO) effects not only are a powerful probe of magnetism
and electronic structure of magnetic solids but also have valuable applications
in high-density data-storage technology. Yttrium iron garnet
(Y$_3$Fe$_5$O$_{12}$) (YIG) and bismuth iron garnet (Bi$_3$Fe$_5$O$_{12}$)
(BIG) are two widely used ma... | 2005.14133v2 |
2015-04-07 | Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque | Spin-orbit effects [1-4] have the potential of radically changing the field
of spintronics by allowing transfer of spin angular momentum to a whole new
class of materials. In a seminal letter to Nature [5], Kajiwara et al. showed
that by depositing Platinum (Pt, a normal metal) on top of a 1.3 $\mu$m thick
Yttrium Iron... | 1504.01512v1 |
2017-08-06 | Thermally Driven Long Range Magnon Spin Currents in Yttrium Iron Garnet due to Intrinsic Spin Seebeck Effect | The longitudinal spin Seebeck effect refers to the generation of a spin
current when heat flows across a normal metal/magnetic insulator interface.
Until recently, most explanations of the spin Seebeck effect use the
interfacial temperature difference as the conversion mechanism between heat and
spin fluxes. However, r... | 1708.01941v3 |
2017-09-21 | Electrical properties of single crystal Yttrium Iron Garnet ultra-thin films at high temperatures | We report a study on the electrical properties of 19 nm thick Yttrium Iron
Garnet (YIG) films grown by liquid phase epitaxy. The electrical conductivity
and Hall coefficient are measured in the high temperature range [300,400]~K
using a Van der Pauw four-point probe technique. We find that the electrical
resistivity de... | 1709.07207v1 |
2018-03-02 | Long lifetime of thermally-excited magnons in bulk yttrium iron garnet | Spin currents are generated within the bulk of magnetic materials due to heat
flow, an effect called intrinsic spin-Seebeck. This bulk bosonic spin current
consists of a diffusing thermal magnon cloud, parametrized by the magnon
chemical potential ($\mu_{m}$), with a diffusion length of several microns in
yttrium iron ... | 1803.01054v3 |
2019-03-19 | Magnetic properties and domain structure of ultrathin yttrium iron garnet/Pt bilayers | We report on the structure, magnetization, magnetic anisotropy, and domain
morphology of ultrathin yttrium iron garnet (YIG)/Pt films with thickness
ranging from 3 to 90 nm. We find that the saturation magnetization is close to
the bulk value in the thickest films and decreases towards low thickness with a
strong reduc... | 1903.08285v1 |
2021-04-21 | Atomic Layer Deposition of Yttrium Iron Garnet Thin Films for 3D Magnetic Structures | A wide variety of new phenomena such as novel magnetization configurations
have been predicted to occur in three dimensional magnetic nanostructures.
However, the fabrication of such structures is often challenging due to the
specific shapes required, such as magnetic tubes and spirals. Furthermore, the
materials curre... | 2104.10293v2 |
2019-05-29 | Coherent long-range transfer of angular momentum between magnon Kittel modes by phonons | We report ferromagnetic resonance in the normal configuration of an
electrically insulating magnetic bilayer consisting of two yttrium iron garnet
(YIG) films epitaxially grown on both sides of a 0.5-mm-thick nonmagnetic
gadolinium gallium garnet (GGG) slab. An interference pattern is observed and
it is explained as th... | 1905.12523v3 |
2019-06-28 | Spin transport in an insulating ferrimagnetic-antiferromagnetic-ferrimagnetic trilayer as a function of temperature | We present a study of the transport properties of thermally generated spin
currents in an insulating ferrimagnetic-antiferromagnetic-ferrimagnetic
trilayer over a wide range of temperature. Spin currents generated by the spin
Seebeck effect (SSE) in a yttrium iron garnet (YIG) YIG/NiO/YIG trilayer on a
gadolinium galli... | 1906.12288v1 |
2020-08-21 | Magnons Parametric Pumping in Bulk Acoustic Waves Resonator | We report on the experimental observation of excitation and detection of
parametric spin waves and spin currents in the bulk acoustic wave resonator.
The hybrid resonator consists of ZnO piezoelectric film, yttrium iron garnet
(YIG) films on gallium gadolinium garnet substrate, and a heavy metal Pt layer.
Shear bulk ac... | 2008.09520v1 |
2020-09-06 | Enhancement of YIG$|$Pt spin conductance by local Joule annealing | We report that Joule heating can be used to enhance the interfacial spin
conductivity between a metal and an oxide. We observe that local annealing of
the interface at about 550\,K by injecting large current densities
($>10^{12}\text{A/m}^{2}$) into a pristine 7\,nm thick Pt nanostrip evaporated
on top of yttrium iron ... | 2009.02785v1 |
2020-11-15 | A tunable magneto-acoustic oscillator with low phase noise | A frequency-tunable low phase noise magneto-acoustic resonator is developed
on the base of a parallel-plate straight-edge bilayer consisting of a
yttrium-iron garnet (YIG) layer grown on a substrate of a gallium-gadolinium
garnet(GGG). When a YIG/GGG sample forms an ideal parallel plate, it supports a
series of high-qu... | 2011.07648v1 |
2021-09-13 | Control of magnetization dynamics by substrate orientation in YIG thin films | Yttrium Iron Garnet (YIG) and bismuth (Bi) substituted YIG (Bi0.1Y2.9Fe5O12,
BYG) films are grown in-situ on single crystalline Gadolinium Gallium Garnet
(GGG) substrates [with (100) and (111) orientations] using pulsed laser
deposition (PLD) technique. As the orientation of the Bi-YIG film changes from
(100) to (111),... | 2109.05901v1 |
2022-03-12 | Observation of nonlinear planar Hall effect in magnetic insulator/topological insulator heterostructures | Interfacing topological insulators (TIs) with magnetic insulators (MIs) has
been widely used to study the interaction between topological surface states
and magnetism. Previous transport studies typically interpret the suppression
of weak antilocalization or appearance of the anomalous Hall effect as
signatures of magn... | 2203.06293v2 |
2022-12-05 | Propagating spin-wave spectroscopy in nanometer-thick YIG films at millikelvin temperatures | Performing propagating spin-wave spectroscopy of thin films at millikelvin
temperatures is the next step towards the realisation of large-scale integrated
magnonic circuits for quantum applications. Here we demonstrate spin-wave
propagation in a $100\,\mathrm{nm}$-thick yttrium-iron-garnet film at the
temperatures down... | 2212.02257v3 |
2023-07-20 | The challenges of measuring spin Seebeck noise | Just as electronic shot noise in driven conductors results from the
granularity of charge and the statistical variation in the arrival times of
charge carriers, there are predictions for fundamental noise in magnon currents
due to angular momentum being carried by discrete excitations. The inverse spin
Hall effect as a... | 2307.11218v2 |
2005-04-22 | Perturbation of magnetostatic modes observed by FMRFM | Magnetostatic modes of Yttrium Iron Garnet (YIG) films are investigated by
ferromagnetic resonance force microscopy (FMRFM). A thin film ``probe'' magnet
at the tip of a compliant cantilever introduces a local inhomogeneity in the
internal field of the YIG sample. This influences the shape of the sample's
magnetostatic... | 0504598v1 |
2007-04-24 | Element-resolved x-ray ferrimagnetic and ferromagnetic resonance spectroscopy | We report on the measurement of element-specific magnetic resonance spectra
at gigahertz frequencies using x-ray magnetic circular dichroism (XMCD). We
investigate the ferrimagnetic precession of Gd and Fe ions in Gd-substituted
Yttrium Iron Garnet, showing that the resonant field and linewidth of Gd
precisely coincide... | 0704.3139v2 |
2007-12-11 | Reflection-Free One-Way Edge Modes in a Gyromagnetic Photonic Crystal | We point out that electromagnetic one-way edge modes analogous to quantum
Hall edge states, originally predicted by Raghu and Haldane in 2D gyroelectric
photonic crystals possessing Dirac point-derived bandgaps, can appear in more
general settings. In particular, we show that the TM modes in a gyromagnetic
photonic cry... | 0712.1776v2 |
2008-04-07 | Phase reciprocity of spin-wave excitation by a microstrip antenna | Using space-, time- and phase-resolved Brillouin light scattering
spectroscopy we investigate the difference in phase of the two
counterpropagating spin waves excited by the same microwave microstrip
transducer. These studies are performed both for backward volume magnetostatic
waves and magnetostatic surface waves in ... | 0804.1090v1 |
2008-12-24 | Design and optimization of one-dimensional ferrite-film based magnonic crystals | One-dimensional magnonic crystals have been implemented as gratings of
shallow grooves chemically etched into the surface of yttrium-iron garnet
films. Scattering of backward volume magnetostatic spin waves from such
structures is investigated experimentally and theoretically. Well-defined
rejection frequency bands are... | 0812.4553v1 |
2009-02-18 | Theory of coherence in Bose-Einstein condensation phenomena in a microwave driven interacting magnon gas | Strong experimental evidences of the formation of quasi-equilibrium
Bose-Einstein condensation (BEC) of magnons at room temperature in a film of
yttrium iron garnet (YIG) excited by microwave radiation have been recently
reported. Here we present a theory for the magnon gas driven by a microwave
field far out of equili... | 0902.3138v1 |
2009-07-16 | Reverse Doppler effect in backward spin waves scattered on acoustic waves | We report on the observation of reverse Doppler effect in backward spin waves
reflected off of surface acoustic waves. The spin waves are excited in a
yttrium iron garnet (YIG) film. Simultaneously, acoustic waves are also
generated. The strain induced by the acoustic waves in the magnetostrictive YIG
film results in t... | 0907.2902v1 |
2009-12-16 | Parametric pumping and kinetics of magnons in dipolar ferromagnets | The time evolution of magnons subject to a time-dependent microwave field is
usually described within the so-called "S-theory", where kinetic equations for
the distribution function are obtained within the time-dependent Hartree-Fock
approximation. To explain the recent observation of "Bose-Einstein condensation
of mag... | 0912.3254v2 |
2011-03-11 | Spin pumping by parametrically excited exchange magnons | We experimentally show that exchange magnons can be detected using a
combination of spin pumping and inverse spin-Hall effect (iSHE) proving its
wavelength integrating capability down to the sub-micrometer scale. The magnons
were injected in a ferrimagnetic yttrium iron garnet film by parametric pumping
and the iSHE-in... | 1103.2229v2 |
2011-11-08 | Time-dependent spin-wave theory | We generalize the spin-wave expansion in powers of the inverse spin to
time-dependent quantum spin models describing rotating magnets or magnets in
time-dependent external fields. We show that in these cases, the spin operators
should be projected onto properly defined rotating reference frames before the
spin componen... | 1111.2052v2 |
2011-12-21 | Direct detection of magnon spin transport by the inverse spin Hall effect | Conversion of traveling magnons into an electron carried spin current is
demonstrated in a time resolved experiment using a spatially separated
inductive spin-wave source and an inverse spin Hall effect (ISHE) detector. A
short spin-wave packet is excited in a yttrium-iron garnet (YIG) waveguide by a
microwave signal a... | 1112.4969v1 |
2012-05-20 | Brillouin light scattering spectroscopy of parametrically excited dipole-exchange magnons | The spectral distribution of parametrically excited dipole-exchange magnons
in an in-plane magnetized epitaxial film of yttrium-iron garnet was studied by
means of frequency- and wavevector-resolved Brillouin light scattering
spectroscopy. The experiment was performed in a parallel pumping geometry where
an exciting mi... | 1205.4396v1 |
2012-06-28 | Frequency and power dependence of spin-current emission by spin pumping in a thin film YIG/Pt system | This paper presents the frequency dependence of the spin current emission in
a hybrid ferrimagnetic insulator/normal metal system. The system is based on a
ferrimagnetic insulating thin film of Yttrium Iron Garnet (YIG, 200 nm) grown
by liquid-phase-epitaxy (LPE) coupled with a normal metal with a strong
spin-orbit cou... | 1206.6671v2 |
2012-07-25 | High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids | We report the observation of strong coupling between the exchange-coupled
spins in gallium-doped yttrium iron garnet and a superconducting coplanar
microwave resonator made from Nb. The measured coupling rate of 450 MHz is
proportional to the square-root of the number of exchange-coupled spins and
well exceeds the loss... | 1207.6039v2 |
2012-11-05 | Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers | Using X-ray magnetic circular dichroism (XMCD) measurements, we explore the
possible existence of induced magnetic moments in thin Pt films deposited onto
the ferrimagnetic insulator yttrium iron garnet (Y3Fe5O12). Such a magnetic
proximity effect is well established for Pt/ferromagnetic metal
heterostructures. Indeed,... | 1211.0916v1 |
2012-12-10 | Heat-induced damping modification in YIG/Pt hetero-structures | We experimentally demonstrate the manipulation of magnetization relaxation
utilizing a temperature difference across the thickness of an yttrium iron
garnet/platinum (YIG/Pt) hetero-structure: the damping is either increased or
decreased depending on the sign of the temperature gradient. This effect might
be explained ... | 1212.2073v1 |
2013-02-06 | Theory of spin Hall magnetoresistance | We present a theory of the spin Hall magnetoresistance (SMR) in multilayers
made from an insulating ferromagnet F, such as yttrium iron garnet (YIG), and a
normal metal N with spin-orbit interactions, such as platinum (Pt). The SMR is
induced by the simultaneous action of spin Hall and inverse spin Hall effects
and the... | 1302.1352v1 |
2013-04-08 | YIG thickness and frequency dependence of the spin-charge current conversion in YIG/Pt systems | We report the frequency dependence of the spin current emission in a hybrid
ferrimagnetic insulator/normal metal system as function of the insulating layer
thickness. The system is based on a yttrium iron garnet (YIG) film [0.2, 1, and
3 \mu m] grown by liquid-phase-epitaxy coupled with a spin current detector of
plati... | 1304.2190v1 |
2013-05-14 | Exchange magnetic field torques in YIG/Pt bilayers observed by the spin-Hall magnetoresistance | The effective field torque of an yttrium-iron-garnet film on the spin
accumulation in an attached Pt film is measured by the spin-Hall
magnetoresistance (SMR). As a result, the magnetization direction of a
ferromagnetic insulating layer can be measured electrically. Experimental
transverse and longitudinal resistances ... | 1305.3117v2 |
2013-06-20 | Experimental test of the spin mixing interface conductivity concept | We perform a quantitative, comparative study of the spin pumping, spin
Seebeck and spin Hall magnetoresistance effects, all detected via the inverse
spin Hall effect in a series of over 20 yttrium iron garnet/Pt samples. Our
experimental results fully support present, exclusively spin current-based,
theoretical models ... | 1306.5012v1 |
2013-07-29 | Current-induced spin wave excitation in Pt|YIG bilayer | We develop a self-consistent theory for current-induced spin wave excitations
in normal metal-magnetic insulator bilayer systems, thereby establishing the
relation between spin wave excitation and the experimentally controlled
parameters. We fully take into account the complex spin wave spectrum including
dipolar inter... | 1307.7607v2 |
2013-09-16 | Time resolved spin Seebeck effect experiments | In this Letter, we present the results of transient thermopower experiments,
performed at room temperature on yttrium iron garnet/platinum bilayers. Upon
application of a time-varying thermal gradient, we observe a characteristic
low-pass frequency response of the ensuing thermopower voltage with cutoff
frequencies of ... | 1309.3986v2 |
2013-11-19 | Observation of the spin Peltier effect | We report the observation of the spin Peltier effect (SPE) in the
ferrimagnetic insulator Yttrium Iron Garnet (YIG), i.e. a heat current
generated by a spin current flowing through a Platinum (Pt)|YIG interface. The
effect can be explained by the spin torque that transforms the spin current in
the Pt into a magnon curr... | 1311.4772v1 |
2014-01-30 | Temperature dependent spin transport properties of Platinum inferred from spin Hall magnetoresistance measurements | We study the temperature dependence of the spin Hall magnetoresistance (SMR)
in yttrium iron garnet/platinum hybrid structures via magnetization orientation
dependent magnetoresistance measurements. Our experiments show a decrease of
the SMR magnitude with decreasing temperature. Using the sensitivity of the SMR
to the... | 1401.7787v4 |
2014-03-02 | Generalized two-temperature model for coupled phonon-magnon diffusion | We generalize the two-temperature model [Sanders and Walton, Phys. Rev. B,
15, 1489 (1977)] for coupled phonon-magnon diffusion to include the effect of
the concurrent magnetization flow. Working within the framework of Boltzmann
transport equation, we derive the constitutive equations for coupled
phonon-magnon transpo... | 1403.0279v1 |
2014-03-04 | Off-Resonant Manipulation of Spins in Diamond via Precessing Magnetization of a Proximal Ferromagnet | We report the manipulation of nitrogen vacancy (NV) spins in diamond when
nearby ferrimagnetic insulator, yttrium iron garnet, is driven into precession.
The change in NV spin polarization, as measured by changes in
photoluminescence, is comparable in magnitude to that from conventional
optically detected magnetic reso... | 1403.0656v1 |
2014-05-06 | Hybridizing ferromagnetic magnons and microwave photons in the quantum limit | We demonstrate large normal-mode splitting between a magnetostatic mode (the
Kittel mode) in a ferromagnetic sphere of yttrium iron garnet and a microwave
cavity mode. Strong coupling is achieved in the quantum regime where the
average number of thermally or externally excited magnons and photons is less
than one. We a... | 1405.1913v2 |
2014-06-14 | Electric-field coupling to spin waves in a centrosymmetric ferrite | We experimentally demonstrate that the spin-orbit interaction can be utilized
for direct electric-field tuning of the propagation of spin waves in a
single-crystal yttrium iron garnet magnonic waveguide. Magnetoelectric coupling
not due to the spin-orbit interaction, and hence an order of magnitude weaker,
leads to ele... | 1406.3675v1 |
2014-07-29 | Motion of domain walls and the dynamics of kinks in the magnetic Peierls potential | We study the dynamics of magnetic domain walls in the Peierls potential due
to the discreteness of the crystal lattice. The propagation of a narrow domain
wall (comparable to the lattice parameter) under the effect of a magnetic field
proceeds through the formation of kinks in its profile. We predict that,
despite the ... | 1407.7754v1 |
2014-08-06 | Observation of Magnonic Band Gaps in Magnonic Crystals with Nopnreciprocal Dispersion Relation | An effect of metallization of the magnonic crystal surface on the band gaps
formation in the spectra of the surface spin wave (SSW) is studied both
theoretically and experimentally. The structures under consideration are
one-dimensional magnonic crystals based on yttrium iron garnet with an array of
etched grooves with... | 1408.1221v2 |
2014-09-19 | Perpendicularly Biased YIG Tuners for the Fermilab Recycler 52.809 MHz Cavities | For NOvA and future experiments requiring high intensity proton beams,
Fermilab is in the process of upgrading the existing accelerator complex for
increased proton production. One such improvement is to reduce the Main
Injector cycle time, by performing slip stacking, previously done in the Main
Injector, in the now r... | 1409.5762v1 |
2014-09-30 | Spin Hall noise | We measure the low-frequency thermal fluctuations of pure spin current in a
Platinum film deposited on yttrium iron garnet via the inverse spin Hall effect
(ISHE)-mediated voltage noise as a function of the angle $\alpha$ between the
magnetization and the transport direction. The results are consistent with the
fluctua... | 1409.8513v2 |
2014-10-22 | Spin current generation from sputtered Y3Fe5O12 films | Spin current injection from sputtered yttrium iron garnet (YIG) films into an
adjacent platinum layer has been investigated by means of the spin pumping and
the spin Seebeck effects. Films with a thickness of 83 and 96 nanometers were
fabricated by on-axis magnetron rf sputtering at room temperature and
subsequent post... | 1410.5987v1 |
2014-12-07 | Magnonic band gaps in YIG based magnonic crystals: array of grooves versus array of metallic stripes | The magnonic band gaps of the two types of planar one-dimensional magnonic
crystals comprised of the periodic array of the metallic stripes on yttrium
iron garnet (YIG) film and YIG film with an array of grooves was analyzed
experimentally and theoretically. In such periodic magnetic structures the
propagating magnetos... | 1412.2367v2 |
2014-12-22 | Surface sensitivity of the spin Seebeck effect | We have investigated the influence of the interface quality on the spin
Seebeck effect (SSE) of the bilayer system yttrium iron garnet (YIG) - platinum
(Pt). The magnitude and shape of the SSE is strongly influenced by mechanical
treatment of the YIG single crystal surface. We observe that the saturation
magnetic field... | 1412.7712v1 |
2015-01-12 | Anomalous Hall effect in YIG$|$Pt bilayers | We measure the ordinary and the anomalous Hall effect in a set of yttrium
iron garnet$|$platinum (YIG$|$Pt) bilayers via magnetization orientation
dependent magnetoresistance experiments. Our data show that the presence of the
ferrimagnetic insulator YIG leads to an anomalous Hall like signature in Pt,
sensitive to bot... | 1501.02574v3 |
2015-01-14 | A spin-wave logic gate based on a width-modulated dynamic magnonic crystal | An electric current controlled spin-wave logic gate based on a
width-modulated dynamic magnonic crystal is realized. The device utilizes a
spin-wave waveguide fabricated from a single-crystal Yttrium Iron Garnet film
and two conducting wires attached to the film surface. Application of electric
currents to the wires pr... | 1501.03486v2 |
2015-02-18 | Spectral shape deformation in inverse spin Hall voltage in Y3Fe5O12|Pt bilayers at high microwave power levels | We report on the deformation of microwave absorption spectra and of the
inverse spin Hall voltage signals in thin film bilayers of yttrium iron garnet
(YIG) and platinum at high microwave power levels in a 9.45-GHz TE011 cavity.
As the microwave power increases from 0.15 to 200 mW, the resonance field
shifts to higher ... | 1502.05198v1 |
2015-02-13 | Spin-current injection and detection in strongly correlated organic conductor | Spin-current injection into an organic semiconductor
$\rm{\kappa\text{-}(BEDT\text{-}TTF)_2Cu[N(CN)_2]Br}$ film induced by the spin
pumping from an yttrium iron garnet (YIG) film. When magnetization dynamics in
the YIG film is excited by ferromagnetic or spin-wave resonance, a voltage
signal was found to appear in the
... | 1502.05244v1 |
2015-03-02 | Supercurrent in a room temperature Bose-Einstein magnon condensate | We report evidence for the existence of a supercurrent of magnons in a magnon
Bose-Einstein condensate prepared in a room temperature yttrium-iron-garnet
magnetic film and subject to a thermal gradient. The magnon condensate is
formed in a parametrically populated magnon gas, and its temporal evolution is
studied by ti... | 1503.00482v2 |
2015-04-10 | Influence of magnetic surface anisotropy on spin wave reflection from the edge of ferromagnetic film | We study propagation of the Gaussian beam of spin waves and its reflection
from the edge of thin yttrium-iron-garnet film with in-plane magnetization
perpendicular to this edge. We have performed micromagnetic simulations
supported by analytical calculations to investigate influence of the surface
magnetic anisotropy p... | 1504.02668v2 |
2015-04-30 | Magneto-optical imaging technique for hostile environment: the ghost imaging approach | We develop a new approach in magneto-optical imaging (MOI), applying for the
first time a ghost imaging (GI) protocol to perform Faraday microscopy. MOI is
of the utmost importance for the investigation of magnetic properties of
material samples, through Weiss domains shape, dimension and dynamics analysis.
Nevertheles... | 1504.08239v2 |
2015-05-07 | Formation of Bright Solitons from Wave Packets with Repulsive Nonlinearity | Formation of bright envelope solitons from wave packets with a repulsive
nonlinearity was observed for the first time. The experiments used surface
spin-wave packets in magnetic yttrium iron garnet (YIG) thin film strips. When
the wave packets are narrow and have low power, they undergo self-broadening
during the propa... | 1505.01882v1 |
2015-05-23 | Long distance transport of magnon spin information in a magnetic insulator at room temperature | The transport of spin information has been studied in various materials, such
as metals, semiconductors and graphene. In these materials, spin is transported
by diffusion of conduction electrons. Here we study the diffusion and
relaxation of spin in a magnetic insulator, where the large bandgap prohibits
the motion of ... | 1505.06325v1 |
2015-05-26 | Observation of pure inverse spin Hall effect in ferromagnetic metals by FM/AFM exchange bias structures | We report that the spin current generated by spin Seebeck effect (SSE) in
yttrium iron garnet (YIG) can be detected by a ferromagnetic metal (NiFe). By
using the FM/AFM exchange bias structure (NiFe/IrMn), inverse spin Hall effect
(ISHE) and planar Nernst effect (PNE) of NiFe can be unambiguously separated,
allowing us... | 1505.06911v2 |
2015-06-19 | Spin superfluidity and long-range transport in thin-film ferromagnets | In ferromagnets, magnons may condense into a single quantum state. Analogous
to superconductors, this quantum state may support transport without
dissipation. Recent works suggest that longitudinal spin transport through a
thin-film ferromagnet is an example of spin superfluidity. Although intriguing,
this tantalizing ... | 1506.06029v1 |
2015-06-19 | Cavity mediated coherent coupling of magnetic moments | We demonstrate the long range strong coupling of magnetostatic modes in
spatially separated ferromagnets mediated by a microwave frequency cavity. Two
spheres of yttrium iron garnet are embedded in the cavity and their
magnetostatic modes probed using a dispersive measurement technique. We find
they are strongly couple... | 1506.06049v2 |
2015-07-10 | Magnon dark modes and gradient memory | Extensive efforts have been expended in developing hybrid quantum systems to
overcome the short coherence time of superconducting circuits by introducing
the naturally long-lived spin degree of freedom. Among all the possible
materials, single-crystal yttrium iron garnet has shown up very recently as a
promising candid... | 1507.02791v1 |
2015-08-20 | Superstrong Coupling of a Microwave Cavity to YIG Magnons | Multiple-post reentrant 3D lumped cavity modes have been realized to design
the concept of discrete Whispering Gallery and Fabry-Perot-like Modes for
multimode microwave Quantum Electrodynamics experiments. Using a magnon
spin-wave resonance of a submillimeter-sized Yttrium-Iron-Garnet sphere at
milliKelvin temperature... | 1508.04967v3 |
2015-08-25 | Non-local magnetoresistance in YIG/Pt nanostructures | We study the local and non-local magnetoresistance of thin Pt strips
deposited onto yttrium iron garnet. The local magnetoresistive response,
inferred from the voltage drop measured along one given Pt strip upon
current-biasing it, shows the characteristic magnetization orientation
dependence of the spin Hall magnetore... | 1508.06130v1 |
2015-09-14 | Spectral characteristics of time resolved magnonic spin Seebeck effect | Spin Seebeck effect (SSE) holds promise for new spintronic devices with
low-energy consumption. The underlying physics, essential for a further
progress, is yet to be fully clarified. This study of the time resolved
longitudinal SSE in the magnetic insulator yttrium iron garnet (YIG) concludes
that a substantial contri... | 1509.04018v1 |
2015-10-13 | Optomagnonic whispering gallery microresonators | Magnons in ferrimagnetic insulators such as yttrium iron garnet (YIG) have
recently emerged as promising candidates for coherent information processing in
microwave circuits. Here we demonstrate optical whispering gallery modes of a
YIG sphere interrogated by a silicon nitride photonic waveguide, with quality
factors a... | 1510.03545v1 |
2015-11-24 | Ferromagnetic Resonance of a YIG film in the Low Frequency Regime | An improved method for characterizing the magnetic anisotropy of films with
cubic symmetry is described and is applied to an yttrium iron garnet (111)
film. Analysis of the FMR spectra performed both in-plane and out-of-plane from
0.7 to 8 GHz yielded the magnetic anisotropy constants as well as the
saturation magnetiz... | 1511.07892v1 |
2015-12-01 | Epitaxial patterning of nanometer-thick Y3Fe5O12 films with low magnetic damping | Magnetic insulators such as yttrium iron garnet, Y3Fe5O12, with extremely low
magnetic damping have opened the door for low power spin-orbitronics due to
their low energy dissipation and efficient spin current generation and
transmission. We demonstrate reliable and efficient epitaxial growth and
nanopatterning of Y3Fe... | 1512.00286v1 |
2015-12-02 | Bose-Einstein Condensation of Magnons Pumped by the Bulk Spin Seebeck Effect | We propose inducing Bose-Einstein condensation of magnons in a magnetic
insulator by a heat flow oriented toward its boundary. At a critical heat flux,
the oversaturated thermal gas of magnons accumulated at the boundary
precipitates the condensate, which then grows gradually as the thermal bias is
dialed up further. T... | 1512.00557v1 |
2015-12-02 | Non-equilibrium thermodynamics of the longitudinal spin Seebeck effect | In this paper we employ non equilibrium thermodynamics of fluxes and forces
to describe magnetization and heat transport. By the theory we are able to
identify the thermodynamic driving force of the magnetization current as the
gradient of the effective field $\nabla H^*$. This definition permits to define
the spin See... | 1512.00639v1 |
2015-12-14 | Nonlocal Anomalous Hall Effect | The anomalous Hall effect is deemed to be a unique transport property of
ferromagnetic metals, caused by the concerted action of spin polarization and
spin-orbit coupling. Nevertheless, recent experiments have shown that the
effect also occurs in a nonmagnetic metal (Pt) in contact with a magnetic
insulator (yttrium ir... | 1512.04146v1 |
2016-01-05 | Proximity induced room-temperature ferromagnetism in graphene probed with spin currents | The introduction and control of ferromagnetism in graphene opens up a range
of new directions for fundamental and applied studies. Several approaches have
been pursued so far, such as introduction of defects, functionalization with
adatoms, and shaping of graphene into nanoribbons with well-defined zigzag
edges. A more... | 1601.00995v1 |
2016-01-21 | Spin pumping in strongly coupled magnon-photon systems | We experimentally investigate magnon-polaritons, arising in ferrimagnetic
resonance experiments in a microwave cavity with a tuneable quality factor. To
his end, we simultaneously measure the electrically detected spin pumping
signal and microwave reflection (the ferrimagnetic resonance signal) of a
yttrium iron garnet... | 1601.05681v1 |
2016-02-12 | Transport and spin conversion of multi-carriers in semimetal bismuth | In this paper, we report on the investigation of (1) the transport properties
of multi-carriers in semi-metal Bi and (2) the spin conversion physics in this
semimetal system in a ferrimagnetic insulator, yttrium-iron-garnet. Hall
measurements reveal that electrons and holes co-exist in the Bi, with electrons
being the ... | 1602.03953v1 |
2016-03-02 | Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator | We report large enhancement of thermally injected spin current in normal
metal (NM)/antiferromagnet(AF)/yttrium iron garnet(YIG), where a thin AF
insulating layer of NiO or CoO can enhance spin current from YIG to a NM by up
to a factor of 10. The spin current enhancement in NM/AF/YIG, with a pronounced
maximum near th... | 1603.00931v2 |
2016-04-08 | Gate-tunable spin-charge conversion and a role of spin-orbit interaction in graphene | The small spin-orbit interaction of carbon atoms in graphene promises a long
spin diffusion length and potential to create a spin field-effect transistor.
However, for this reason, graphene was largely overlooked as a possible
spin-charge conversion material. We report electric gate tuning of the
spin-charge conversion... | 1604.02222v1 |
2016-04-13 | Magnon spin transport driven by the magnon chemical potential in a magnetic insulator | We develop a linear-response transport theory of diffusive spin and heat
transport by magnons in magnetic insulators with metallic contacts. The magnons
are described by a position dependent temperature and chemical potential that
are governed by diffusion equations with characteristic relaxation lengths.
Proceeding fr... | 1604.03706v1 |
2016-04-24 | Who pumps spin current into nonmagnetic-metal (NM) layer in YIG/NM multilayers at ferromagnetic resonance? | Spin pumping in Yttrium-iron-garnet (YIG)/nonmagnetic-metal (NM) layer
systems under ferromagnetic resonance (FMR) conditions is a popular method of
generating spin current in the NM layer. A good understanding of the spin
current source is essential in extracting spin Hall angle of the NM and in
potential spintronics ... | 1604.07025v1 |
2016-04-24 | Optomagnonics in Magnetic Solids | Coherent conversion of photons to magnons, and back, provides a natural
mechanism for rapid control of interactions between stationary spins with long
coherence times and high-speed photons. Despite the large frequency difference
between optical photons and magnons, coherent conversion can be achieved
through a three-p... | 1604.07052v2 |
2016-04-25 | Magnon based logic in a multi-terminal YIG/Pt nanostructure | Boolean logic is the foundation of modern digital information processing.
Recently, there has been a growing interest in phenomena based on pure spin
currents, which allow to move from charge to spin based logic gates. We study a
proof-of-principle logic device based on the ferrimagnetic insulator Yttrium
Iron Garnet (... | 1604.07262v1 |
2016-05-01 | Magnetoelectric fields for microwave chirality discrimination in enantiomeric liquids | Chirality discrimination is of a fundamental interest in biology, chemistry,
and metamaterial studies. In optics, near-field plasmon-resonance spectroscopy
with superchiral probing fields is effectively applicable for analyses of large
biomolecules with chiral properties. We show possibility for microwave
near-field ch... | 1605.00212v1 |
2016-05-17 | Direct observation of dynamic modes excited in a magnetic insulator by pure spin current | Excitation of magnetization dynamics by pure spin currents has been recently
recognized as an enabling mechanism for spintronics and magnonics, which allows
implementation of spin-torque devices based on low-damping insulating magnetic
materials. Here we report the first spatially-resolved study of the dynamic
modes ex... | 1605.05211v1 |
2016-05-27 | Combined Brillouin light scattering and microwave absorption study of magnon-photon coupling in a split-ring resonator/YIG film system | Microfocused Brillouin light scattering (BLS) and microwave absorption (MA)
are used to study magnon-photon coupling in a system consisting of a split-ring
microwave resonator and a yttrium iron garnet (YIG) film. The split-ring
resonantor is defined by optical lithography and loaded with a 1 $\mu$m-thick
YIG film grow... | 1605.08531v1 |
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