Curvature induced chirality symmetry breaking in vortex core switching phenomena

TL;DR

This paper investigates how surface curvature influences magnetic vortex core switching, revealing that curvature-induced effects cause chirality-dependent switching efficiency, which diminishes as the surface becomes flatter.

Contribution

It demonstrates the curvature-dependent chirality symmetry breaking in vortex core switching, providing numerical evidence of how surface shape affects magnetic dynamics.

Findings

Switching efficiency depends on vortex chirality and surface curvature.

The effect diminishes as the surface approaches a planar geometry.

Minimum switching field varies with vortex chirality and curvature radius.

Abstract

The interplay between magnetic vortex polarity, chirality and the curvature of the underlying surface results in a dependence of the vortex polarity switching efficiency on the vortex chirality. The switching is studied numerically by applying a short Gauss pulse of the external magnetic field to a spherical cap within its cut plane. The minimum field intensity required for the switching essentially depends on the vortex chirality and it does not depend on the initial vortex polarity. This effect decreases with the curvature radius increasing and it vanishes in the planar limit.