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

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

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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 languageEnglish
Article number104106
JournalJournal of Applied Physics
Issue number10
Publication statusPublished - 14 Sep 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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