Effect of magnetoelastic interaction on magnetostatic mode spectrum in thick ferrite films with nonpinned surface spins

Effect of an exchange magnetostatic wave and an acoustic wave resonance interaction on the dipole magnetostatic wave spectrum has been investigated theoretically and experimentally in ferrite film-dielectric substrate planar structures in microwave frequency range. Thick YIG films ( 5-10 mcm) with thickness much more than the acoustic wavelength and exchange spin wavelength have been considered. Surface spins were nonpinned and so only dipole modes can be excited in such ferrite films without a magnetoacoustic interaction. In thick films dipole modes were not coupled with acoustic modes. Exchange mode excitation became possible under its resonance interaction with acoustic modes. The resonance interaction of spin waves and acoustic waves was achieved under their phase synchronism