Viscous dynamics of vortices in a ferromagnetic film

Abstract

We derive viscous forces for vortices in a thin-film ferromagnet. The viscous force acting on vortex $i$ is a linear superposition ${\mathbf{F}}_i=-{\sum }_j{\hat{D}}_{ij}{\mathbf{V}}_j$, where ${\mathbf{V}}_j$ is the velocity of vortex $j$. Thanks to the long-range nature of vortices, the mutual drag tensor ${\hat{D}}_{ij}$ is comparable in magnitude to the coefficient of self-drag $D_{ii}$.

4.5 pages, 2 figures

References in corpus (5)

• Dynamics of domain walls in magnetic nanostrips
• Soliton pair dynamics in patterned ferromagnetic ellipses
• Dynamics of a vortex domain wall in a magnetic nanostrip: an application of the collective coordinate approach
• Rotating vortex dipoles in ferromagnets
• Vortex motion in a finite-size easy-plane ferromagnet and application to a nanodot

Cited by in corpus (4)

• Magnetic texture based magnonics
• Topology-Dependent Brownian Gyromotion of a Single Skyrmion
• The dynamics of bimeron skyrmions in easy-plane magnets induced by a spin supercurrent
• Stable and unstable trajectories in a dipolar chain