Oxygen-ion and electron conductivity in Sr2(Fe1-xGax)2 O5

I. A. Leonidov, M. V. Patrakeev, J. A. Bahteeva, K. V. Poholok, D. S. Filimonov, K. R. Poeppelmeier, V. L. Kozhevnikov

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16 Citations (Scopus)

Abstract

High-temperature electrical conductivity measurements, structural data from powder X-ray diffraction and 57Fe Mössbauer spectroscopy were combined to study the interrelationship of oxygen ion transport and p- and n-type transport in Sr2(Fe1-xGax)2O 5, where x = 0, 0.1 and 0.2. Although gallium substitution generally decreases the total ion-electron transport, the transition of the orthorhombic brownmillerite structure to a cubic phase on heating results in the recurrence of the conductivity to the same high level as in the parent ferrite (x = 0). The changes of the partial contributions to the total conductivity as a function of x are shown to reflect a complicated interplay of the disordering processes that develop in the oxygen sublattice on heating in response to replacement of iron with gallium.

Original languageEnglish
Pages (from-to)3045-3051
Number of pages7
JournalJournal of Solid State Chemistry
Volume179
Issue number10
DOIs
Publication statusPublished - Oct 1 2006

Keywords

  • Electrical conductivity
  • Mössbauer spectroscopy
  • Strontium ferrite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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    Leonidov, I. A., Patrakeev, M. V., Bahteeva, J. A., Poholok, K. V., Filimonov, D. S., Poeppelmeier, K. R., & Kozhevnikov, V. L. (2006). Oxygen-ion and electron conductivity in Sr2(Fe1-xGax)2 O5. Journal of Solid State Chemistry, 179(10), 3045-3051. https://doi.org/10.1016/j.jssc.2006.05.028