Magnetoelastic waves in a ferromagnetic film on a nonmagnetic substrate

We present a theoretical study of the propagation of magnetoelastic waves in a ferromagnetic film bonded to a nonmagnetic substrate. We find magnetoelastic waves which correspond to both Rayleigh waves and Love waves modified by the magnetoelastic interaction. Deviations from the elastic-wave characteristics are found in the frequency region where bulk and surface spin waves propagate. Most particularly, a rich, strongly frequency dependent, and highly nonreciprocal attenuation rate is found for these modes. The anomalies associated with the surface spin waves are very sensitive to spin pinning conditions.