Vortex motion in chilarity-controlled pair of magnetic disks

TL;DR

This study explores how vortex chirality affects magnetization dynamics in coupled magnetic disks, revealing that vortex annihilation depends on vortex movement direction, supported by experimental and simulation data.

Contribution

It demonstrates the impact of vortex chirality asymmetry on vortex motion and annihilation in coupled magnetic disks, combining experimental measurements with micromagnetic simulations.

Findings

Vortex annihilation depends on vortex movement direction.

Opposite chiralities are achieved by disk asymmetry.

Experimental results align with micromagnetic simulations.

Abstract

We investigate the influence of the vortex chirality on the magnetization processes of a magnetostatically coupled pair of magnetic disks. The magnetic vortices with opposite chiralities are realized by introducing asymmetry into the disks. The motion of the paired vortices are studied by measuring the magnetoresistance with lock-in resistance bridge technique. The vortex annihilation process is found to depend on the moving directions of the magnetic vorticies. The experimental results are well reproduced by the micromagnetic simulation.