Skyrmion dynamics in a chiral magnet driven by periodically varying spin currents

Abstract

In this work, we investigated the spin dynamics in a slab of chiral magnets induced by an alternating (ac) spin current. Periodic trajectories of the skyrmion in real space are discovered under the ac current as a result of the Magnus and viscous forces, which originate from the Gilbert damping, the spin transfer torque, and the $\beta$-nonadiabatic torque effects. The results are obtained by numerically solving the Landau-Lifshitz-Gilbert equation and can be explained by the Thiele equation characterizing the skyrmion core motion.

References in corpus (18)

• Skyrmion Lattice in a Chiral Magnet
• Spin Transfer Torques
• Topological Hall effect in the A-phase of MnSi
• Spin Transfer Torques in MnSi at Ultra-low Current Densities
• Emergent electrodynamics of skyrmions in a chiral magnet
• Current-induced skyrmion dynamics in constricted geometries
• Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
• A reversible conversion between a skyrmion and a domain-wall pair in junction geometry
• The Fascinating World of Landau-Lifshitz-Gilbert Equation: An Overview
• Rotating skyrmion lattices by spin torques and field or temperature gradients
• Quantized Anomalous Hall Effects in Skyrmion Crystal
• AC current generation in chiral magnetic insulators and skyrmion motion induced by the spin Seebeck effect
• Skyrmion Generation by Current
• Domain wall-gated skyrmion logic
• Chaotic Dynamics of Spin-Valve Oscillators
• High-topological-number magnetic skyrmions and topologically protected dissipative structure
• Spin-Orbit Torques and Anisotropic Magnetization Damping in Skyrmion Crystals
• Tailoring the topological details of the magnetic skyrmion by the spin configuration at the edges

Cited by in corpus (1)

• Light-induced anisotropic skyrmion and stripe phases in a Rashba ferromagnet