Electrical properties of the ferrite SrFeOy at high temperatures

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

103 Scopus citations


The electrical properties of the strontium ferrite are reported within the temperature range 700 to 950°C and the oxygen partial pressure range between 10-18 and 0.3 atm. The observed pressure and temperature dependencies of the conductivity in the brownmillerite form of the ferrite are related to the transition of the electron conductivity from the intrinsic regime, which is governed by the band gap of about 2 eV, to the extrinsic regime, which is controlled by the extrastoichiometric oxygen in the brownmillerite phase. The brownmillerite phase is shown to be a mixed conductor with the oxygen conductivity rising to about 0.1 S/cm at 850-900°C and Po2>10-17 atm. The perovskite-like layers in the brownmillerite structure provide a possible pathway for the ion migration.

Original languageEnglish (US)
Pages (from-to)320-326
Number of pages7
JournalJournal of Solid State Chemistry
Issue number2
StatePublished - 2001


  • Brownmillerite
  • Conductivity
  • Oxygen transfer
  • Perovskite
  • Strontium ferrite
  • Thermopower

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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