论述了在交变磁场下测量磁光薄膜动态法拉第效应的原理和方法.利用此方法,在不同的调制磁场强度和频率下测量磁光薄膜的动态法拉第旋转特性,获得了较好的测量结果,并对测量误差进行了分析.

The experimental apparatus for measuring the peak value of the Faraday rotation F induced by alternating magnetic field is set up. The sample used here is a magneto-optical film Prefared by liquid Phase epitaxy. By measuring the fundamental and the second harmonic of the photodetector current at a angle away from cross setting of P, A, the F can be calculated. The method is simple and accurate and can be used at any frequency.