Investigations of Sr3Fe2-xMnxO7-δ the n=2 Ruddlesden-Popper phases with d3/d4 interactions

Gabriel M. Veith, Ian D. Fawcett, Martha Greenblatt, Mark Croft, Israel Nowik

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16 Scopus citations


We have prepared a series of Mn substituted strontium ferrates, Sr3Fe2-xMnxO7-δ where x=2/3, 1 and 4/3, and investigated their properties with X-ray diffraction, X-ray absorption near edge spectroscopy (XANES), Mössbauer spectroscopy, variable-temperature resistivity and magnetic susceptibility. These compounds are metastable and have to be prepared at high temperatures, > 1250°C, with solid state techniques followed by quenching in air to room temperature. As a consequence the compounds are oxygen deficient and contain some Fe3+. They are insulators and exhibit spin-glass like behavior at low temperatures due to frustrated magnetic interactions between the disordered array of transition metal ions on the B site. Mössbauer and XANES spectra show that the B cations are not fully oxidized and that the Fe4+ in these compounds are charge-disproportionated into Fe3+ and Fe5+ at low temperature.

Original languageEnglish (US)
Pages (from-to)513-522
Number of pages10
JournalInternational Journal of Inorganic Materials
Issue number6
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • Materials Chemistry


  • C. X-ray diffraction
  • Mössbauer spectroscopy


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