Microwave magnetic dynamics in ferromagnetic metallic nanostructures lacking inversion symmetry

TL;DR

This study investigates how different symmetry-breaking factors in ferromagnetic nanostripes influence their microwave magnetic response, revealing that combined symmetry breaks significantly enhance the ferromagnetic resonance effects.

Contribution

It provides a systematic experimental and theoretical analysis of the effects of multiple symmetry breaks on FMR in ferromagnetic nanostripes, highlighting the combined impact.

Findings

Combined symmetry breaks amplify FMR response more than individual factors.

Different symmetry-breaking scenarios produce distinct FMR behaviors.

The study advances understanding of symmetry effects in nanoscale magnetic systems.

Abstract

In this work we carried out systematic experimental and theoretical investigations of the ferromagnetic (FMR) response of quasi-two-dimensional magnetic nano-objects - microscopically long nanostripes made of ferromagentic metals. We were interested in the impact of the symmetries of this geometry on the FMR response. Three possible scenarios, from which the inversion symmetry break originated, were investigated:(1) from the shape of the stripe cross-section, (2) from the double-layer structure of the stripes with exchange coupling between the layers, and (3) from the single-side incidence of the microwave magnetic field on the plane of the nano-pattern. The latter scenario is characteristic of the stripline FMR configuration. It was found that the combined effect of the three symmetry breaks is much stronger than the impacts of each of these symmetry breaks separately.