Diffusive and Fluid-like Motion of Homochiral Domain Walls in Easy-Plane Magnetic Strips
arXiv:2107.07025 · doi:10.1103/PhysRevApplied.16.054002
Abstract
Propagation of easy-plane magnetic precession can enable more efficient spin transport than conventional spin waves. Such easy-plane spin transport is typically understood in terms of a hydrodynamic model, partially analogous to superfluids. Here, using micromagnetic simulations, we examine easy-plane spin transport in magnetic strips as the motion of a train of domain walls rather than as hydrodynamic flow. We observe that the motion transitions from diffusive to fluid-like as the density of domain walls is increased. This transition is most evident in notched nanostrips, where the the domain walls are pinned by the notch defect in the diffusive regime but propagate essentially unimpeded in the fluid-like regime. Our findings suggest that spin transport via easy-plane precession, robust against defects, is achievable in strips based on realistic metallic ferromagnets and hence amenable to practical device applications.
arXiv comment13 pages, 10 figures
References in corpus (25)
- The design and verification of Mumax3
- Control of spin-orbit torques through crystal symmetry in WTe2/ferromagnet bilayers
- Electrically controlled long-distance spin transport through an antiferromagnetic insulator
- Spin-orbit torques induced by interface-generated spin currents
- Domain wall mobility, stability and Walker breakdown in magnetic nanowires
- Dynamics of domain walls in magnetic nanostrips
- Spin currents and spin superfluidity
- Superfluid spin transport through antiferromagnetic insulators
- Long range pure magnon spin diffusion observed in a non-local spin-Seebeck geometry
- Dissipationless Spin Transport in Thin Film Ferromagnets
- Determination of spin Hall effect and spin diffusion length of Pt from self-consistent fitting of damping enhancement and inverse spin-orbit torque measurements
- Non-Local Transport Mediated by Spin-Supercurrents
- Spin superfluidity and long-range transport in thin-film ferromagnets
- Breaking of Galilean invariance in the hydrodynamic formulation of ferromagnetic thin films
- Dephasing of Transverse Spin Current in Ferrimagnetic Alloys
- Very low critical current density for motion of coupled domain walls in synthetic ferrimagnet nanowires
- Magnetic Domain Walls as Hosts of Spin Superfluids and Generators of Skyrmions
- Thermally-Activated Phase Slips in Superfluid Spin Transport in Magnetic Wires
- Magnetic Damping in Epitaxial Fe Alloyed with Vanadium and Aluminum
- Superfluid spin transport in ferro- and antiferromagnets
- Symmetry-broken dissipative exchange flows in thin-film ferromagnets with in-plane anisotropy
- Perspective: (Beyond) spin transport in insulators
- Self-stabilizing exchange-mediated spin transport
- Hydrodynamic description of long-distance spin transport through noncollinear magnetization states: the role of dispersion, nonlinearity, and damping
- Controllable vortex shedding from dissipative exchange flows in ferromagnetic channels