Preparation of oxygen excess SrLaFeO4+δ and its electrical and magnetic properties

T. Omata, K. Ueda, N. Ueda, M. Katada, S. Fujitsu, T. Hashimoto, H. Kawazoe

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Oxygen excess SrLaFeO4+δ was prepared and the electrical and magnetic properties were measured. Electrical resistivities at room temperature were 3 × 103 and 5 × 101 Ω-cm for the N2-annealed sample and the sample annealed under oxygen pressure of 20 bar, respectively. The antiferromagnetic Néel temperature decreased from 355 K for the N2-annealed sample to 334 K for the sample annealed under oxygen pressure of 20 bar. 57Fe Mössbauer spectra showed that iron is in the high spin and trivalent state even in the strongly oxidized SrLaFeO4+δ. We discussed the characteristics of the positive holes introduced by excess oxygens and the effects of the holes on resistivities.

Original languageEnglish
Pages (from-to)807-811
Number of pages5
JournalSolid State Communications
Volume88
Issue number10
DOIs
Publication statusPublished - 1993 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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