MSSW and MSVW in a multilayered ferrimagnetic structure with an arbitrary orientation between two static magnetizations

A study of both magnetostatic surface wave (MSSW) and magnetostatic volume wave (MSVW) propagation in multilayered magnetic thin films with noncollinear magnetizations is presented. A YIG/GGG/YIG structure is used (YIG and GGG refer to yttrium iron garnet and gadolinium gallium garnet, respectively). The layered film is in the (110) plane. Due to the existence of both cubic and induced in-plane uniaxial anisotropy fields in the two YIG films, their magnetizations are not aligned with the applied DC field. Since there is an arbitrary angle between the two, a new configuration exists for studying both MSSW and MSVW propagations. The MSVW propagation in the plane formed by the two magnetizations shows a different dispersion relationship from that in the direction perpendicular to that plane. For a given applied DC field normal to the film plane, MSVWs are excited in the one while MSSWs are excited in the other. It was found that the angle between the two static magnetizations strongly affects the dispersion relationship