Tuning domain wall oscillation frequency in bent nanowires through a mechanical analogy

TL;DR

This paper introduces a theoretical model describing how the oscillation frequency of domain walls in curved nanowires can be controlled via magnetic fields and curvature, using a mechanical analogy to facilitate device design.

Contribution

It presents a novel theoretical framework modeling domain wall oscillations in curved nanowires as a mechanical pendulum, aligning well with experimental data.

Findings

DW oscillation frequency depends on curvature and magnetic field

Model matches experimental data accurately

Potential for designing devices with controlled DW motion

Abstract

In this work, we present a theoretical model for domain wall (DW) oscillations in a curved magnetic nanowire with a constant curvature under the action of a uniaxial magnetic field. Our results show that the DW dynamics can be described as that of the mechanical pendulum, and both the NW curvature and the external magnetic field influence its oscillatory frequency. A comparison between our theoretical approach and experimental data in the literature shows an excellent agreement. The results presented here can be used to design devices demanding the proper control of the DW oscillatory motion in NWs.