Spin-wave-driven skyrmion dynamics in ferrimagnets: Effect of net angular momentum
arXiv:2112.13232 · doi:10.1103/PhysRevB.106.064424
Abstract
Searching for low-power-consuming and high-efficient methods for well controllable driving of skyrmion motion is one of the most concerned issues for future spintronic applications, raising high concern with an appreciated choice of magnetic media and driving scenario. In this work, we propose a novel scenario of spin wave driven skyrmion motion in a ferrimagnetic (FiM) lattice with the net angular momentum δs. We investigate theoretically the effect of both δs and the circular polarization of spin wave on the skyrmion dynamics. It is revealed that the momentum onto the skyrmion imposed by the excited spin wave can be partitioned into a ferromagnetic term plus an antiferromagnetic term. The ratio of these two terms and consequently the Hall angle of skyrmion motion can be formulated as the functions of δs, demonstrating the key role of δs as an effective control-parameter for the skyrmion motion. Moreover, the spin wave frequency dependent skyrmion motion is discussed, predicting the frequency enhanced skyrmion Hall motion. This work thus represents an essential contribution to understand the skyrmion dynamics in a FiM lattice.
25 pages, 4 figures
References in corpus (13)
- Theory of current-driven motion of Skyrmions and spirals in helical magnets
- Magnetic Skyrmion Bundles and Their Current-Driven Dynamics
- Magnonic frequency comb through nonlinear magnon-skyrmion scattering
- Coherent Terahertz Spin-Wave Emission Associated with Ferrimagnetic Domain Wall Dynamics
- Topological spin Hall effects and tunable skyrmion Hall effects in uniaxial antiferromagnetic insulators
- Ultrafast domain wall motion in ferrimagnets induced by magnetic anisotropy gradient
- Magnon driven skyrmion dynamics in antiferromagnets: The effect of magnon polarization
- Walker breakdown with a twist: Dynamics of multilayer domain walls and skyrmions driven by spin-orbit torque
- Configurable pixelated skyrmions on nanoscale magnetic grids
- Domain wall dynamics of ferrimagnets induced by spin-current near the angular momentum compensation temperature
- Recent progress in antiferromagnetic dynamics
- Ultrafast depinning of domain wall in notched antiferromagnetic nanostructures
- Magnetic skyrmion generation by reflective spin-wave focusing