Robust dynamics of antiferromagnetic skyrmion driven by spin-polarized current in small thin disks
arXiv:2008.01061 · doi:10.1063/5.0024003
Abstract
We investigate skyrmion configuration and dynamics in antiferromagnetic thin disks. It is shown that the skyrmion acquires oscillatory dynamics with well-defined amplitude and frequency which may be controlled on demand by the spin-polarized current. Such dynamics are robust in the sense that an interface between two half-disks cannot change the dynamics appreciably. Indeed, the skyrmion keeps its oscillatory despite crossing this interface. The way skyrmion found to do that is by modifying its core region shape so that its total energy is unaltered for several cycles.
5 pages, 12 figures
References in corpus (4)
- Skyrmion Hall Effect Revealed by Direct Time-Resolved X-Ray Microscopy
- Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings
- Antiferromagnetic skyrmion crystals: generation, topological Hall and topological spin Hall effect
- How hole defects modify vortex dynamics in ferromagnetic nanodisks