[8a-E208-1~11] 10.2 Fundamental and exploratory device technologies for spin

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[8a-E208-3] Nonlinear Interaction between Magnons and Surface Acoustic Wave Phonons

〇Yasuhiro Todaka¹, Yuhang Chen¹, Masashi Kawaguchi¹, Masamitsu Hayashi¹ (1.The Univ. of Tokyo)

Keywords:

phonon-magnon coupling,surface acoustic wave,parametric excitation

When surface acoustic wave (SAW) phonons propagate in a magnetic thin film, their interaction with magnons can show nonlinear behavior. In this study, we experimentally investigated this nonlinear phonon-magnon coupling using a device with interdigital transducers (IDTs). By varying the input microwave power and magnetic field, we observed clear nonlinear responses in the transmitted signal, such as a threshold-like power dependence. Additionally, numerical simulations well reproduced these experimental trends, confirming nonlinear magnetoelastic coupling as the underlying mechanism.