Abstract

Experimental investigation is given to overthreshold parametric phase conjugation of ultrasound waves with the frequency of 22 MHz under resonant excitation of discrete acoustic modes with the frequencies of 0.214 and 1.248 MHz in the antiferromagnetic single crystal of α-Fe₂O₃. It is shown that nonlinear interaction with discrete modes is accompanied by amplitude and phase modulation of traveling phase-conjugate ultrasound waves. In processes of Raman scattering by discrete modes the modulation depth can amount to 100%.

中文翻译：

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共轭声波与磁体中弹性振动离散模式的相互作用

摘要

实验研究的是超过阈值的超声波的参数相位共轭与22兆赫下具有0.214和1.248兆赫的在α-Fe的反铁磁性单晶频率离散声响模式的共振激发频率₂ Ó ₃。结果表明，与离散模式的非线性相互作用伴随着行相共轭超声波的振幅和相位调制。在通过离散模式进行的拉曼散射过程中，调制深度可以达到100％。