Аннотация:Ferrite-garnet films of submicron thickness were investigated by ferromagnetic resonance method. It wasfound that the magnetization of the sample in perpendicular to the surface of the film magnetic fieldshowed an abnormal change in the magnetization and also rotation of the magnetic axis. This behaviorof a ferromagnetic material in the presence of a magnetic field can be explained by the expressions for thelinear magnetostrictive effect, and the piezomagnetic effect arising from the para-processes operatingwithin a ‘‘weak” rare-earth magnetic sublattice which is located inside a unidirectional exchange fieldof ‘‘strong” iron sublattice.