Magnetoelastic Waves in Ferromagnetic Thin Films Mediated by Dipolar Interactions
Hiroki Yoshida, Ryohei Kono, Manato Fujimoto, Motoki Asano, Daiki Hatanaka + 2 more
TLDR
This paper theoretically investigates magnetoelastic waves in ferromagnetic thin films, predicting hybridization between magnetostatic and Lamb waves.
Key contributions
- Develops a theoretical model for magnetoelastic coupling in thin films via dipolar interactions.
- Integrates dipolar fields from Maxwell's equations with elastic deformations.
- Predicts hybridization between magnetostatic and Lamb waves in ferromagnetic films.
- Numerical results for YIG films show anti-crossings and hybridization gaps (0.1-several MHz).
Why it matters
Understanding magnetoelastic waves is crucial for developing novel spintronic devices. This theoretical framework provides insights into their behavior, particularly the hybridization phenomenon. It could lead to new ways to control spin and elastic waves.
Original Abstract
Magnetoelastic coupling mediated by magnetic dipolar interactions is theoretically investigated in ferromagnetic thin films under an in-plane magnetic field. We develop a theoretical description that incorporates dipolar fields derived from Maxwell's equations in the presence of elastic deformations. The resulting coupled equations of motion predict hybridization between magnetostatic and Lamb waves. Numerical calculations for a yttrium iron garnet (YIG) film reveal anti-crossings in the dispersion relations, with hybridization gaps ranging from $0.1$ to several MHz.
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