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MA: Fachverband Magnetismus
MA 2: Computational Magnetism I
MA 2.9: Talk
Monday, March 18, 2024, 11:45–12:00, H 1058
Bi-directionally coupled simulation of magnetization dynamics and elastodynamics — •Peter Flauger1, Matthias Küß2, Michael Karl Steinbauer1, Bernhard Emhofer1, Matthias Volz3, Hubert Krenner3, Manfred Albrecht2, and Claas Abert1 — 1University of Vienna — 2University of Augsburg — 3University of Münster
The interaction of surface acoustic waves (SAWs) with spin waves (SWs) in magnetic thin films via the magnetoelastic effect allows e.g. for the excitation of SW modes with prolonged propagation distances [1] or magnetic field sensors [2] and is thus of current scientific interest.
In this work, we present a self-consistent solver for coupled magnetization dynamics and linear elasticity simulations based on the finite-differences method as an extension to the python library magnum.np [3]. This solver is then used to investigate the excitation of spin waves in magnetic thin films by SAWs. The observed non-reciprocity of the excitation with respect to the propagation direction and the power loss of the SAW are compared to experimental results on Ni films on a LiTaO3 substrate [4].
[1] C. Chen et al., Appl. Phys. Lett. 110, 072401 (2017).
[2] A. Kittmann et al., Sci. Rep. 8, 278 (2018).
[3] F. Bruckner et al., Sci Rep. 13, 12054 (2023).
[4] M. Küß et al., Phys. Rev. Appl. 15, 034046 (2021).
Keywords: Magnetoelastic coupling; Surface acoustic waves; Spin waves; Micromagnetism; Finite-difference method