Control of the gyration dynamics of magnetic vortices by the magnetoelastic effect

TL;DR

This paper investigates how strain-induced magnetoelastic anisotropy affects magnetic vortex core dynamics in microstructured CoFeB elements, showing a decrease in eigenfrequency consistent with micromagnetic models.

Contribution

It demonstrates the control of vortex gyration frequency through magnetoelastic effects in magnetostrictive materials, combining experimental and modeling approaches.

Findings

Eigenfrequency decreases with increasing magnetoelastic anisotropy

Experimental results agree with micromagnetic simulations

Magnetoelastic effect enables tunable vortex dynamics

Abstract

The influence of a strain-induced uniaxial magnetoelastic anisotropy on the magnetic vortex core dynamics in microstructured magnetostrictive Co$_{40}$Fe$_{40}$B$_{20}$ elements was investigated with time-resolved scanning transmission x-ray microscopy. The measurements revealed a monotonically decreasing eigenfrequency of the vortex core gyration with the increasing magnetoelastic anisotropy, which follows closely the predictions from micromagnetic modeling.