Novel surface anisotropy term in the FMR spectra of amorphous microwires

TL;DR

This paper challenges the notion of a new circumferential anisotropy in amorphous microwires' FMR spectra, demonstrating that traditional anisotropies suffice to explain observed spectral features.

Contribution

It refutes the claim of a novel surface anisotropy in amorphous microwires, showing existing models are adequate.

Findings

Traditional uniaxial and surface anisotropies explain spectral features

No need to introduce new circumferential anisotropy

Spectral data can be modeled without additional anisotropic terms

Abstract

Some recent publications on ferromagnetic resonance in amorphous wires mention presumably new kind of anisotropy, called there circumferential anisotropy, as an explanation of various spectral features. In this paper we argue that there is no special reason to speak of the new kind of anisotropy, since the observed spectra can be well described in terms of more traditional uniaxial and surface anisotropies alone.