High magnetic ordering temperature in the perovskites Sr 4-xLa xFe 3ReO 12 (x=0.0, 1.0, 2.0)

M. Retuerto, M. R. Li, Y. B. Go, A. Ignatov, M. Croft, K. V. Ramanujachary, R. H. Herber, I. Nowik, J. P. Hodges, W. Dachraoui, J. Hadermann, M. Greenblatt

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A series of perovskites Sr 4-xLa xFe 3ReO 12 (x=0.0, 1.0, 2.0) has been prepared by wet chemistry methods. The structure analyses by powder X-ray and neutron diffraction and electron microscopy show that these compounds adopt simple perovskite structures without cation ordering over the B sites: tetragonal (I4/mcm) for x=0.0 and 1.0 and orthorhombic (Pbmn) for x=2.0. The oxidation states of the cations in the compound with x=0.0 appear to be Fe 3/4 and Re 7 and decrease for both with La substitution as evidenced by X-ray absorption spectroscopy. All the compounds are antiferromagnetically ordered above room temperature, as demonstrated by Mössbauer spectroscopy and the magnetic structures, which were determined by powder neutron diffraction. The substitution of Sr by La strongly affects the magnetic properties with an increase of T N up to ∼750 K.

Original languageEnglish (US)
Pages (from-to)48-58
Number of pages11
JournalJournal of Solid State Chemistry
StatePublished - Oct 2012

All Science Journal Classification (ASJC) codes

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


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