Higher order magnetoelasticity energy corrections in bcc and fcc systems

TL;DR

This paper investigates the impact of higher-order strain terms on magnetoelastic energy in bcc and fcc systems, finding that these terms have negligible influence on the anisotropic magnetostriction in the studied cubic structures.

Contribution

It derives higher-order strain terms in magnetoelastic energy for bcc and fcc systems, expanding beyond the common linear approximation.

Findings

Higher-order strain terms are negligible for studied cubic systems.

The work relates anisotropic magnetostriction to strain-dependent magnetocrystalline energy.

Provides a simple parametrization for analyzing magnetoelastic effects.

Abstract

Magnetoelastic properties play a vital role in industrial applications. Despite being hidden behind either purely magnetic or elastic behavior, magnetoelasticity takes place in a wide range of devices as transducers, acoustic actuators, or fast response sensors. In this work, we inspect the impact of higher-order terms on the anisotropic magnetostriction behavior. Regarding ab-initio calculations, the anisotropic magnetostriction can be related to the strain dependence of the magnetocrystaline energy. Commonly, the description is restricted to a linear strain dependence in the magnetoelastic energy. Here, we derive higher-order terms in strain for bcc and fcc crystal structures. Using a simple parametrization, we show that the influence of the higher-order strain terms is negligible for the studied cubic systems.