Work

Micromagnetic modeling of surface acoustic wave—driven dynamics: Interplay of strain, magnetorotation, and magnetic anisotropy

Year: 2026

Type: article

Abstract: We study the coupling mechanism of surface acoustic waves (SAW) with spin waves (SW) using micromagnetic analysis. The SAW magnetoacoustic excitation field is fully implemented, i.e., all strain and lattice-rotation terms are included. A realistic CoFeB film with a weak in-plane uniaxial anisotropy is considered. We investigate the conditions for efficient SAW--SW coupling, with particular emphasis on the case where the SAW propagates parallel to the external magnetic field, a configuration of special interest for magnonic applications. Remarkably, we find that the anisotropy orientation serves as a knob to tune the parallel resonant interaction. Overall, this work provides a unified and practical picture of SAW--SW coupling in thin magnetized films.

Source: Physical Review Applied

DOI: 10.1103/7v5p-h1f4

Authors: Florian Millo, Pauline Rovillain, Massimiliano Marangolo, Daniel Stoeffler

Institutions: Centre National de la Recherche Scientifique, Sorbonne Université, Institut des NanoSciences de Paris, Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg

Language: English

Topic: Magnetic properties of thin films

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Award: Surface acoustic waves for magnonique devices