Dynamics of an elliptical ferromagnetic skyrmion driven by the spin-orbit torque
arXiv:1910.09341 · doi:10.1063/1.5132915
Abstract
Magnetic skyrmion is a promising building block for developing information storage and computing devices. It can be stabilized in a ferromagnetic thin film with the Dzyaloshinskii-Moriya interaction (DMI). The moving ferromagnetic skyrmion may show the skyrmion Hall effect, that is, the skyrmion shows a transverse shift when it is driven by a spin current. Here, we numerically and theoretically study the current-driven dynamics of a ferromagnetic nanoscale skyrmion in the presence of the anisotropic DMI, where the skyrmion has an elliptical shape. The skyrmion Hall effect of the elliptical skyrmion is investigated. It is found that the skyrmion Hall angle can be controlled by tuning the profile of elliptical skyrmion. Our results reveal the relation between the skyrmion shape and the skyrmion Hall effect, which could be useful for building skyrmion-based spintronic devices with preferred skyrmion Hall angle. Also, our results provide a method for the minimization of skyrmion Hall angle for applications based on in-line motion of skyrmions.
5 pages, 4 figures
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Cited by in corpus (8)
- Spin Insulatronics
- Nonzero Skyrmion Hall Effect in Topologically Trivial Structures
- Structural transition of skyrmion quasiparticles under compression
- Unified framework of the microscopic Landau-Lifshitz-Gilbert equation and its application to Skyrmion dynamics
- Topological meron-antimeron domain walls and skyrmions in a low-symmetry system
- Atomic-scale Dzyaloshinskii-Moriya-modified Yoshimori spirals in Fe double layer on Ir(110)
- Elliptical skyrmions: theory and nucleation by a magnetic tip in an antiskyrmion-hosting material
- Controlling Skyrmion Lattices via Strain: Elongation, Tilting, and Collapse Mechanisms