Resonance modes of layered ferromagnets in a transverse magnetic field

Intensities and positions of resonance lines are calculated for the ferromagnetic resonance spectra of multilayer ferromagnetic films in a magnetic field oriented normally to the film surface. It is shown that the positions of spectral lines depend on the number of ferromagnetic layers, while the line intensities are determined by the phase shift between the oscillations of the magnetic moments of neighboring layers. A qualitative comparison is carried out between the results of calculations and the spectra observed in experiments.