Structure and magnetic properties of the orthorhombic n=2 Ruddlesden-Popper phases Sr3Co2O5+δ (δ=0.91, 0.64 and 0.38)

L. Viciu, H. W. Zandbergen, Q. Xu, Q. Huang, M. Lee, R. J. Cava

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Abstract

The reduced Ruddlesden-Popper phases, Sr3Co2O 5+δ with δ=0.91, 0.64 and 0.38, have been prepared in a nitrogen atmosphere. The crystal structures were determined by powder neutron diffraction. Oxygen vacancies are found both in O(3) and O(4) sites but the majority are along one crystallographic axis in the CoO 2 plane, inducing an orthorhombic distortion of the normally tetragonal n=2 Ruddelsden-Popper structure. Superstructures due to oxygen ordering are observed by electron microscopy. The magnetic measurements reveal complex behavior with some ferromagnetic interactions present for Sr 3Co2O5.91 and Sr3Co 2O5.64.

Original languageEnglish (US)
Pages (from-to)500-511
Number of pages12
JournalJournal of Solid State Chemistry
Volume179
Issue number2
DOIs
StatePublished - Feb 1 2006

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

Keywords

  • Magnetic properties
  • Oxygen deficient Ruddlesden-Popper phase
  • SrCoO

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