Work

Modeling magnetoelastic wave interactions in magnetic films and heterostructures: A finite-difference approach

Year: 2026

Type: article

Abstract: . The (inverse) magnetostrictive effect in ferromagnets couples the magnetic properties to the mechanical stress, allowing for an interaction between the magnetic and mechanical degrees of freedom. In this work, we present a time-integration scheme for the self-consistent simulation of coupled magnetoelastic dynamics within the framework of finite-difference micromagnetism. The proposed implementation extends the Landau-Lifshitz-Gilbert equation by a strain-induced effective field and concurrently solves the elastic equation of motion, while correctly incorporating stress and strain discontinuities at material interfaces. We then present a comprehensive set of examples, ranging from static stress configurations over material boundaries to simulations of surface-acoustic-wave attenuation in magnetically structured thin and thick films. These computational experiments both validate the implementation and underscore the significance of properly handling jump and boundary conditions in magnon-phonon interaction studies.

Source: Physical Review Applied

DOI: 10.1103/9txq-sc8f