Variable-range-hopping conductivity in high-k Ba(Fe0.5Nb0.5)O3ceramics

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)O₃ceramics

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

Research output: Journal article publication › Journal article › Academic research › peer-review

31 Citations (Scopus)

Abstract

The dielectric and transport properties of Ba(Fe0.5Nb0.5)O3ceramics 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.

Original language	English
Article number	104106
Journal	Journal of Applied Physics
Volume	114
Issue number	10
DOIs	https://doi.org/10.1063/1.4821042
Publication status	Published - 14 Sept 2013

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.4821042

http://hdl.handle.net/10397/13828

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Variable-range-hopping conductivity in high-k Ba(Fe_0.5Nb_0.5)O₃ceramics

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