Abstract: The growth and lattice mismatch of the double-layered (BiAl) YIG film are described in this paper, The FM R spectra of the film are measured with the static magnetic field applied at various angles to the film normal.Peculiarities are revealed in the dependences of the FMR fields,intensities and linewidths on the angle, which are different from those of the single-layered film. The magnetic coupling between two layers is used to explain the nonuniform widening of the FMR linewidth of the double-layered film and the new phenomena in the FMR spectrum.The interlayer magnetic coupling parameters are calculated to be different at different angles.

Key words: YIG film, ferromagnetic resonance(FMR), interlayer magnetic coupling, LPE