Magnetostatic Surface Waves in a Ferrite-Ferromagnetic Metal Layered Medium Based on Yttrium Iron Garnet Epitaxial Films and TbCo2/FeCo Nanostructures

摘要

The effect of a thin ferromagnetic metal layer placed on the surface of an yttrium iron garnet surface on the spectrum and loss of magnetostatic surface waves (MSSWs) is experimentally investigated in the case of homogeneous metallization and in the case of a system of periodic metal strips. It is shown that essential attenuation is produced by a metal layer whose thickness is substantially smaller than the depth of the skin layer appearing when an MSSW propagates along a ferromagnetic-metal boundary. The presence of the MSSW reflection by the boundary between the metallic and nonmetallic parts of a ferromagnetic film is experimentally confirmed by the Mandelstam-Brillouin spectroscopy.