摘要
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.
源语言 | 英语 |
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文章编号 | 104106 |
期刊 | Journal of Applied Physics |
卷 | 114 |
期 | 10 |
DOI | |
出版状态 | 已出版 - 14 9月 2013 |