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A technique for the experimental visualization of the distribution of the amplitudes and phases of the magnetostatic waves propagating in ferrite film structures is developed. It is shown that applying the Fou rier transform to the data obtained with the use of this technique, it is possible to investigate the mode com position of the magnetostatic waves and find dispersion dependences for each mode. On the basis of the pro posed technique, distributions of magnetostatic surface waves in bilateral samples of ferrite films are investi gated. It is found that, at a wavelength comparable with the substrate thickness, the ferrite film at the opposite side of the substrate significantly changes the wave distribution in the sample and causes spatial beating along the propagation axis.

The visualized diffraction patterns of surface spin wave excited by arbitrarily oriented linear transducer are investigated experimentally in the plane of tangentially magnetized ferrite film for the case where the transducer length D is much larger than the wavelength λ 0 . It is shown experimentally and theoretically that the angular width of diffracted surface spin wave beam in anisotropic ferrite film can take values greater or less than λ 0 /D and can also be zero. For the last case superdirectional (nonexpanding) beam of the surface spin wave is observed experimentally: the smearing of the beam energy along the film plane is absent and the length of the beam trajectory is maximal (~50 mm). It is found, that well known Rayleigh criterion used in isotropic media can't be used to estimate the angular width of spin wave beams. The experimental results are in good agreement with theoretical investigations, predictions, calculations and formulas obtained recently.