Forward volume magnetoacoustic spin wave excitation with micron-scale spatial resolution

The interaction between surface acoustic waves (SAWs) and spin (SWs) in a piezoelectric-magnetic thin film heterostructure yields potential for the realization of novel microwave devices applications magnonics. In present work, we characterize magnetoacoustic three adjacent magnetic micro-stripes made from CoFe + Ga, CoFe, Pt with single pair tapered interdigital transducers (TIDTs). were deposited by focused electron beam-induced deposition ion direct-writing techniques. transmission characteristics TIDTs are leveraged to selectively address individual micro-stripes. Here, external field is continuously rotated out plane forward volume SW geometry probed along normal. Our experimental findings well explained an extended phenomenological model based on modified Landau–Lifshitz–Gilbert approach that considers SWs nonzero wave vectors. Magnetoelastic excitation possible because vertical shear strain ? xz Rayleigh-type SAW.