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arXiv · 2409.04370

Magnetoacoustic waves in a highly magnetostrictive FeGa thin film

Marc Rovirola·M. Waqas Khaliq·Blai Casals·Adrian Begué·Neven Biskup·Noelia Coton·Joan Manel Hernàndez·Miguel Angel Niño·Michael Foerster·Alberto Hernández-Mínguez·Rocío Ranchal·Marius V. Costache·Antoni García-Santiago·Ferran Macià
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Abstract

The interaction between surface acoustic waves and magnetization offers an efficient route for electrically controlling magnetic states. Here, we demonstrate the excitation of magnetoacoustic waves in galfenol, a highly magnetostrictive alloy made of iron (72%) and gallium (28%). We quantify the amplitude of the induced magnetization oscillations using magnetic imaging in an X-ray photoelectron microscope and estimate the dynamic magnetoelastic constants through micromagnetic simulations. Our findings demonstrate the potential of galfenol for magnonic applications and reveal that, despite strong magnetoelastic coupling, magnetic interactions and spin-wave dispersion relations significantly influence the overall amplitude of magnetoacoustic waves.

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Marc Rovirola, M. Waqas Khaliq, Blai Casals, Adrian Begué, Neven Biskup, Noelia Coton, Joan Manel Hernàndez, Miguel Angel Niño, Michael Foerster, Alberto Hernández-Mínguez, Rocío Ranchal, Marius V. Costache, Antoni García-Santiago, Ferran Macià. 2024-09-06. Magnetoacoustic waves in a highly magnetostrictive FeGa thin film. https://arxiv.org/abs/2409.04370

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