Microwave excitations of a domain wall in a cubic magnet with induced anisotropy

Theoretical and experimental studies are made of the spectra of spin wave e xcitations localized at a Bloch domain wall in a ferromagnet with combined cubic and biaxial anisotropy in [100]- or [110]-oriented bismuth-containing iron garnet films. This analysis of the spectra is used as the basis to ca lculate diagrams of stable states of a homogeneous Bloch domain wall as a f unction of the magnetic parameters in these materials. Results of measureme nts of the oscillation spectrum of an isolated domain wall in the mega- and gigahertz frequency ranges are presented. A description is given of an eff ect where the spin-wave excitations of the Goldstone translational branch a nd the high-frequency Gilinskii unidirectional mode are hybridized. (C) 199 9 American Institute of Physics. [S1063-7842(99)01006-5].