Variable-range-hopping conductivity in high-k Ba(Fe0.5Nb 0.5)O3 ceramics

Shanming Ke; Peng Lin; Huiqing Fan; Haitao Huang; Xierong Zeng

doi:10.1063/1.4821042

Variable-range-hopping conductivity in high-k Ba(Fe_0.5Nb _0.5)O₃ ceramics

Shanming Ke, Peng Lin, Huiqing Fan, Haitao Huang, Xierong Zeng

材料学院

科研成果: 期刊稿件 › 文章 › 同行评审

33 引用（Scopus）

摘要

The dielectric and transport properties of Ba(Fe_0.5Nb _0.5)O₃ ceramics have been investigated in a temperature range of 140-300 K and a frequency range of 1 Hz-10 MHz. The temperature dependence of bulk dc conductivity does not feature an Arrhenius behavior, but indicates a variable-range-hopping mechanism. The observed low temperature relaxation can be perfectly described by a polaronic model, which indicates that the dielectric relaxation is intimately related to the hopping motion caused by localized charge carriers.

源语言	英语
文章编号	104106
期刊	Journal of Applied Physics
卷	114
期	10
DOI	https://doi.org/10.1063/1.4821042
出版状态	已出版 - 14 9月 2013

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AB - The dielectric and transport properties of Ba(Fe0.5Nb 0.5)O3 ceramics have been investigated in a temperature range of 140-300 K and a frequency range of 1 Hz-10 MHz. The temperature dependence of bulk dc conductivity does not feature an Arrhenius behavior, but indicates a variable-range-hopping mechanism. The observed low temperature relaxation can be perfectly described by a polaronic model, which indicates that the dielectric relaxation is intimately related to the hopping motion caused by localized charge carriers.

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Variable-range-hopping conductivity in high-k Ba(Fe0.5Nb 0.5)O3 ceramics

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Variable-range-hopping conductivity in high-k Ba(Fe_0.5Nb _0.5)O₃ ceramics