Synthesis and properties of the structurally one-dimensional cobalt oxide Ba1-xSrxCoO3 (0 ≤ × ≤ 0.5)

K. Yamaura, H. W. Zandbergen, K. Abe, R. J. Cava

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Abstract

The hexagonal perovskite solid solution Ba1-xSrxCoO3 (0 ≤ × ≤ 0.5) was synthesized by treatment of cubic perovskite precursors at 500°C in high-pressure oxygen. The structure consists of parallel chains of face-sharing CoO6 octahedra and alkaline-earth ion separators. All materials were found to be semiconducting. Seebeck coefficient measurements indicate that transport is by both electrons and holes. The slopes of the magnetic susceptibility vs temperature data suggest that Co is in the low-spin S=1/2 electronic configuration. The positive Curie-Weiss Θw's indicate a predominantly ferromagnetic spin interaction, and a complex magnetic state is seen at low temperature in the temperature-and field-dependent magnetic data.

Original languageEnglish (US)
Pages (from-to)96-102
Number of pages7
JournalJournal of Solid State Chemistry
Volume146
Issue number1
DOIs
StatePublished - Aug 1999

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

  • BaCoO
  • Chain structure
  • Hexagonal perovskite
  • Low-dimensional magnetism

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