Abstract
Magneto-electric properties of bismuth-substituted ferrite-garnet epitaxial films and yttrium ferrite-garnet films have been investigated by using optical polarimetry method, electromagneto-optical (EMO) effect. The EMO effect in the transverse electric (E) field was measured. In the yttrium ferrite-garnet films, the EMO effect in the specified geometry is not registered, though in a longitudinal E-field, it was observed by us. The EMO effect in separate multidomain areas of bismuth-substituted ferrite-garnet films was registered in the transverse electric field. A weak hysteresis appears in the magnetic-field dependences of the measured effect. A value of the EMO signal considerably depends on the external magnetic field, and in the homogeneously magnetized films, the EMO effect is practically absent. The irradiation of bismuth-substituted ferrite-garnet films by powerful laser impulse leads to increase of the EMO signal that can be a result of removal, in them, of nonuniform pressure.
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