Multimode magnon-phonon interaction in ferrimagnetic thin films

Abstract

Coherent interaction between a single magnon mode and multiple phonon modes is demonstrated on hybrid magnonic device made of ferrimagnetic thin films. Thanks to the high crystalline quality of the thin film, both magnon and phonon modes have very low losses that are comparable to their coupling strengths. This ensures excellent coherence in their interaction, allowing the observation of coherent phenomena such as pulse echo.