Unconventional spin currents in magnetic films
arXiv:1904.12610 · doi:10.1103/PhysRevResearch.2.023324
Abstract
A spin current - a flow of spin angular momentum - can be carried either by spin polarised free electrons or by magnons, the quanta of a moving collective oscillation of localised electron spins - a spin wave. Traditionally, it was assumed, that a spin wave in a magnetic film with spin-sink-free surfaces can transfer energy and angular momentum only along its propagation direction. In this work, using Brillouin light scattering spectroscopy in combination with a theory of dipole-exchange spin-wave spectra, we show that in obliquely magnetized free magnetic films the in-plane propagation of spin waves is accompanied by a transverse spin current along the film normal without any corresponding transverse transport of energy.
References in corpus (21)
- Magnonic crystals for data processing
- Reconfigurable nano-scale spin-wave directional coupler
- Experimental prototype of a spin-wave majority gate
- Magnon Polarons in the Spin Seebeck Effect
- Superfluid Spin Transport through Easy-Plane Ferromagnetic Insulators
- Supercurrent in a room temperature Bose-Einstein magnon condensate
- Sub-micrometer yttrium iron garnet LPE films with low ferromagnetic resonance losses
- Boundary conditions for magnetization in magnetic nano-elements
- Direct detection of magnon spin transport by the inverse spin Hall effect
- Magneto-elastic modes and lifetime of magnons in thin yttrium-iron garnet films
- Magnon-polaron transport in magnetic insulators
- Coherent excitation of heterosymmetric spin waves with ultrashort wavelengths
- Bose-Einstein Condensation of Quasi-Particles by Rapid Cooling
- Nonlocal magnon-polaron transport in yttrium iron garnet
- Josephson and Persistent Spin Currents in Bose-Einstein Condensates of Magnons
- Bottleneck accumulation of hybrid magneto-elastic bosons
- Wide-range wavevector selectivity of magnon gases in Brillouin light scattering spectroscopy
- Spin superfluidity and long-range transport in thin-film ferromagnets
- Temperature dependent relaxation of dipole-exchange magnons in yttrium iron garnet films
- The Unusual Nature of Confined Modes in a Chiral System
- Magnon transport through microwave pumping
Cited by in corpus (8)
- Double accumulation and anisotropic transport of magneto-elastic bosons in yttrium iron garnet films
- Correlation-enhanced interaction of a Bose-Einstein condensate with parametric magnon pairs and virtual magnons
- Confined dipole and exchange spin waves in a bulk chiral magnet with Dzyaloshinskii-Moriya interaction
- Confinement of Bose-Einstein magnon condensates in adjustable complex magnetization landscapes
- Bose-Einstein condensation in systems with flux equilibrium
- Rapid-prototyping of microscopic thermal landscapes in Brillouin light scattering spectroscopy
- Accumulation of magnetoelastic bosons in yttrium iron garnet: kinetic theory and wave vector resolved Brillouin light scattering
- Electrical detection of unconventional transverse spin-currents in obliquely magnetized thin films