Pb5Ge3O11：Cr晶体在相变时的电磁诱导旋光。1. Pb5Ge3O11：Cr中的电回旋效应
Electrically and magnetically induced optical rotation in Pb5Ge3O11:Cr crystals at the phase transition. 1. Electrogyration effect in Pb5Ge3O11:Cr
摘要：
研究了Pb_5Ge_3 O_（11）：Cr晶体的电回旋效应和自然旋光性随温度的变化。发现这些晶体具有极高的EG系数。我们还演示了如何居里-外斯常数，临界指数的序参量和介电常数，以及热力学势的系数，可以从温度依赖性的旋光性和EG系数。
英文摘要：
We present the results of studies for temperature dependences of electrogyration (EG) effect and natural optical activity in Pb5Ge3O11:Cr crystals. Extremely high magnitude of EG coefficient is found for these crystals. We also demonstrate how the Curie-Weiss constant, the critical exponents of the order parameter and the dielectric permittivity, as well as the coefficients of thermodynamic potential, could be derived from the temperature dependences of optical activity and EG coefficient.
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