поверхностные магнитостатические волны

Yttrium iron garnet (YIG) films on silicon substrates (Si) are of a great interest due to compatibility of their fabrication with semiconductor technologies and, thus, possible integration of magnonic and electronic devices on one chip. However, features of spin wave propagation in YIG films on semiconductor substrates remain almost unexplored.

The exact dispersion equation of electromagnetic modes propagating in structures that include tangentially magnetized ferrite film with surfaces bordered on media with different permittivity is derived. In the low­wavenumber range the comparison of the theoretical calculation with the experimental measurement of dispersion of magnetostatic surface waves propagating in the layered structures of such  types as dielectric­tangentially magnetized ferrite film of yttrium iron garnet–gadolinium gallium garnet is made.

The periodic structure consisting of a shallow grooves on a surface of a ferromagnetic film was investigated. The electrodynamical characteristics of propagation of the surface magnetostatic wave in this structure were obtained. The 2D model of the periodical Yttrium Iron Garnet structure was numerically studied by the algorithm based on the Finite Element method. The spatial distribution of the electric and magnetic field components in different points of dispersion characteristics was studied in detail. The comparison of experimental data and numerical results was carried out.