Abstract

Results of theoretical and experimental investigation of magnetooptic light diffraction by biperiodic stripe domain structures are presented. Such structures exist in ferrite films made from uniaxial magnetic garnets with small positive anisotropy constants. Effects of an external magnetic field and of the film thickness on the symmetry of observed diffraction patterns and on the distribution of the light intensity in different diffraction maxima are studied. Changes in the symmetry of Fourier transforms are shown to occur during phase transitions between different types of biperiodic stripe domain structures. Theoretical calculations of the light intensity of diffracted radiation are shown to agree well with experimental data.

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