Electron/hole and ion transport in La1-xSrxFeO3-δ

M. V. Patrakeev, J. A. Bahteeva, E. B. Mitberg, I. A. Leonidov, V. L. Kozhevnikov, K. R. Poeppelmeier

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164 Citations (Scopus)

Abstract

The conductivity of the entire solid solution La1-xSrxFeO3-δ, where x=0.2, 0.4, 0.5, 0.7 and 0.9, in the oxygen partial pressure range 10-19-0.5atm and temperatures between 750°C and 950°C is reported. The partial contributions from different charge carriers and the energetic parameters governing transport of charged species reveal that the lanthanum-strontium ferrites can be characterized as mixed, ion-electron conductors in the low oxygen pressure/high oxygen deficiency limit. The partial contributions to conductivity from oxygen ions, electrons and holes increase with strontium content and attain maximal values at x=0.5. Further increase in doping results in development of oxygen vacancy ordering phenomena and deterioration of conducting properties.

Original languageEnglish
Pages (from-to)219-231
Number of pages13
JournalJournal of Solid State Chemistry
Volume172
Issue number1
DOIs
Publication statusPublished - Apr 2003

Keywords

  • Electron conductivity
  • Lanthanum-strontium ferrite
  • Oxygen conductivity
  • Oxygen ordering

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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    Patrakeev, M. V., Bahteeva, J. A., Mitberg, E. B., Leonidov, I. A., Kozhevnikov, V. L., & Poeppelmeier, K. R. (2003). Electron/hole and ion transport in La1-xSrxFeO3-δ. Journal of Solid State Chemistry, 172(1), 219-231. https://doi.org/10.1016/S0022-4596(03)00040-9