Magneto‐optical method for ac susceptibility measurements
Magneto‐optical method for ac susceptibility measurements
复制标题
用于交流磁化率测量的磁光方法
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
W. Wolf
中科院分区：
文献类型：
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作者：
M. Ritter;H. Hülsing;W. Wolf
提出了一种测量交流磁化率的新的光学方法。该方法基于可变频率交流磁场对法拉第效应的调制，该磁场平行于通过光学透明样品的光。本系统在2赫兹和200千赫之间工作，但该方法应该能够覆盖更宽的频率范围。频率响应的校准是通过测量范弗莱克准磁石(稀土铝石榴石)来实现的，据预测，该磁石的频率无关磁化率高达∼1太赫兹。给出了镝铝石榴石在各个领域的初步研究结果。
A new optical method has been developed for the measurement of ac magnetic susceptibilities. The method is based on the modulation of the Faraday effect by a variable frequency ac magnetic field, applied parallel to the light passing through an optically transparent sample. The present system operates between 2 Hz and 200 kHz but the method should be capable of covering an even wider frequency range. Calibration of the frequency response is achieved by measuring a Van Vleck paramagnet (thulium aluminum garnet), which is predicted to have a frequency independent susceptibility up to ∼1 THz. Preliminary results for dysprosium aluminum garnet at various fields are presented.