MAGNETOSTATIC VOLUME WAVES IN EXCHANGE-COUPLED FERRITE FILMS

The influence of exchange coupling of layers on the propagation of mag netostatic dipole volume waves in normally and tangentially magnetized two-layer epitaxial ferrite structures is investigated. It is shown t hat the indicated influence is manifested in the form of dynamic spin pinning effects on the interlayer boundary and formation of a common d ipole-exchange wave spectrum for the entire structure. In this case, a t the synchronism frequencies of the dipole and exchange waves the los ses of the dipole waves grow and anomalous segments appear in the disp ersion. In films magnetized in the ''hard'' direction relative to the axis of normal uniaxial surface anisotropy the magnetostatic dipole vo lume waves can interact resonantly with the surface spin waves support ed by the boundaries with pinned spins. (C) 1998 American Institute of Physics. [S1063-7842(98)01707-3].