X/ sub2 /BaCuO/ sub5 /化合物中的异常低频色散

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI:10.1109/CEIDP.1997.634585

J. L. Vicente, A. C. Razzitte, M. C. Cordero, E. Mola

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引用次数: 0

摘要

我们提出并讨论了在钙钛矿陶瓷(X/sub 2/BaCuO/sub 5/， X=Eu-La-Y)中观察到的异常低频色散过程。根据Dissado-Hill-Jonscher理论给出了解释。它是基于在载流子主导的电介质结构的有序和波动的集群描述。研究表明，这种形式的响应发生在低空间维数的系统中，并产生与样品大小相关的电导率。确定了电力系统中幂律噪声与机制之间的关系，并探讨了其结构解释。描述了几种与超导体化合物有关的陶瓷的特殊特征。

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Anomalous low-frequency dispersion in X/sub 2/BaCuO/sub 5/ compounds

We present and discuss the anomalous low-frequency dispersion process observed in perovskite ceramics (X/sub 2/BaCuO/sub 5/, X=Eu-La-Y). The interpretation is given in terms of the Dissado-Hill-Jonscher theory. It is based on a cluster description of the structural ordering and fluctuation in carrier-dominated dielectrics. It is shown that this form of response occurs for systems of low spatial dimensionality and generates a sample-size-dependent conductivity. The relationship of the mechanism to that of power-law noise in electrical systems is identified and its structural interpretation explored. Particular features of several ceramics related to superconductors compounds are described.

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IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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