The characteristic features of ferromagnetic resonance (FMR) were studied in bismuth-containing single-crystal iron-garnet films (BSIGFs) with no rapidly relaxing ions and relatively weak orthorhombic magnetic anisotropy (ORMA). The films were grown on (110) and (210) substrates by liquid-phase epitaxy from a supercooled flux solution. Attention is focused mainly on the unidirectional magnetic anisotropy in the film plane and on the effect of the film/substrate transitional surface layer on the FMR spectrum.

The properties of magnetooptical films of the system (Bi,Gd,Ln)3(Fe,M)5O12, where Ln = Lu or La and M = Ga or Al, grown by liquid-phase epitaxy on Nd3Ga3O12 substrates oriented along (100), along (110), and close to (111), are investigated by x-ray and ferromagnetic resonance methods.