An experimental investigation is performed of the dependence of the amplitude of the second and third acoustical harmonics of a shift wave propagated in an iron-yttrium garnet crystal (a wave frequency of 30 MHz) from an external magnetic field. A rise in the amplitude of the harmonics and distortion of the shape of the initial sinusoidal wave which passes through the crystal are noted in the range of magnetoacoustical resonance. The measurements were taken for different directions of the external magnetic field and an additional magneitizing field (localized in the center of the crystal).
Department of Acoustics, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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