Current-induced motion of twisted skyrmions
arXiv:1903.02812 · doi:10.1063/1.5095686
Abstract
Twisted skyrmions, whose helicity angles are different from that of Bloch skyrmions and Néel skyrmions, have already been demonstrated in experiments recently. In this work, we first contrast the magnetic structure and origin of the twisted skyrmion with other three types of skyrmion including Bloch skyrmion, Néel skyrmion and antiskyrmion. Following, we investigate the dynamics of twisted skyrmions driven by the spin transfer toque (STT) and the spin Hall effect (SHE) by using micromagnetic simulations. It is found that the spin Hall angle of the twisted skyrmion is related to the dissipative force tensor and the Gilbert damping both for the motions induced by the STT and the SHE, especially for the SHE induced motion, the skyrmion Hall angle depends substantially on the skyrmion helicity. At last, we demonstrate that the trajectory of the twisted skyrmion can be controlled in a two dimensional plane with a Gilbert damping gradient. Our results provide the understanding of current-induced motion of twisted skyrmions, which may contribute to the applications of skyrmion-based racetrack memories.
References in corpus (8)
- Skyrmion Lattice in a Chiral Magnet
- Current-driven dynamics of chiral ferromagnetic domain walls
- Blowing Magnetic Skyrmion Bubbles
- Room temperature chiral magnetic skyrmion in ultrathin magnetic nanostructures
- Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
- Discovery of Magnetic Antiskyrmions Beyond Room Temperature in Tetragonal Heusler Materials
- Skyrmion Lattice in a Doped Semiconductor
- Asymmetric skyrmion Hall effect in systems with a hybrid Dzyaloshinskii-Moriya interaction
Cited by in corpus (4)
- Observation of Coherent Spin Waves in a Three-Dimensional Artificial Spin Ice Structure
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- Ferrochiral, antiferrochiral, and ferrichiral skyrmion crystals in an itinerant honeycomb magnet
- Spin order dependent skyrmion stabilization in MnFeCoGe hexagonal magnets