SPACE-CHARGE RELAXATION IN PEROVSKITES
SPACE-CHARGE RELAXATION IN PEROVSKITES
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DOI：
10.1103/physrevb.49.7868
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发表时间：
1994-03-15
影响因子：
3.7
通讯作者：
MAGLIONE, M
中科院分区：
文献类型：
--
作者：
BIDAULT, O;GOUX, P;MAGLIONE, M
我们报告了几个钙钛矿的介电异常，中频10小于或等于f小于或等于10(7)赫兹，温度范围400摄氏度小于或等于T小于或等于800摄氏度。我们已经在100多个不同形状和纹理的样品中发现了这个介电极大值。这种反常现象是由遵循阿累尼乌斯定律减慢的德拜介电色散引起的。我们已经建立了介电松弛和电导率之间的联系。我们认为在较低的温度范围内，可以通过与实验结果定量一致的空间电荷模型来实现这一点。
We report a dielectric anomaly in several perovskites at intermediate frequencies 10 less-than-or-equal-to f less-than-or-equal-to 10(7) Hz in the temperature range 400-degrees-C less-than-or-equal-to T less-than-or-equal-to 800-degrees-C. We have found this dielectric maximum in more than 100 samples of various shapes and textures. This anomaly is shown to arise from a Debye dielectric dispersion that slows down following an Arrhenius law. We have established a link between this dielectric relaxation and the conductivity. We propose that it can be achieved through a space-charge model that quantitatively agrees with the experimental results in the lower temperature range.