INTRINSIC DIELECTRIC LOSS IN CRYSTALS
INTRINSIC DIELECTRIC LOSS IN CRYSTALS
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DOI：
10.1080/00018739100101552
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发表时间：
1991-11-01
影响因子：
--
通讯作者：
TAGANTSEV, AK
中科院分区：
文献类型：
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作者：
GUREVICH, VL;TAGANTSEV, AK
我们回顾了当前固有介电损耗的理论，即完美晶体中由于交流非简谐相互作用而产生的损耗。电场与晶体的声子系统。普通电介质和位移铁电体都被考虑。该理论预测损耗对频率 omega 和温度 T 的依赖性。这种依赖性对晶体的对称性非常敏感。对于普通电介质，除了非对称群之外，列出了所有 32 个对称群的结果并制成表格。在该理论的基础上对现有的实验数据进行了分析和解释。
We review the current theory of intrinsic dielectric loss, that is the loss in a perfect crystal due to anharmonic interaction of a.c. electric field with the phonon system of the crystal. Both ordinary dielectrics and displacive ferroelectrics are considered. The theory predicts dependence of the loss on frequency omega and temperature T. This dependence is very sensitive to the symmetry of the crystal.For ordinary dielectrics, the results are presented and tabulated for all 32 symmetry groups, except for non-symmorphic groups.The existing experimental date are analysed and explained on the basis of the theory.