High pressure synthesis and structure of a new magnetoplumbite-type cobalt oxide SrCo{sub 12}O{sub 19}
- Department of Applied Physics, Waseda University, Ookubo, Shinjuku, Tokyo 169-8555 (Japan)
- Institute for Chemical Research, Kyoto University, Gokashou, Uji 611-0011 (Japan)
A new magnetoplumbite-type hexagonal cobalt oxide, SrCo{sub 12}O{sub 19}, has been synthesized at a high pressure of 3 GPa and its structural and magnetic properties have been studied using single crystalline samples. Bond-valence calculations for five crystallographically independent Co sites show a rather wide charge distribution from +2.15 to +3.50. Magnetic measurements have revealed anisotropic magnetic behavior below a magnetic ordering temperature of 80 K. Comparative discussions on the structure-property relationship for SrCo{sub 12}O{sub 19} and related compounds suggest the presence of localized spins with a uniaxial anisotropy at the trigonal bipyramidal site. - Graphical abstract: A new magnetoplumbite-type hexagonal cobalt oxide, SrCo{sub 12}O{sub 19}, has been synthesized by a high-pressure technique. Bond-valence calculations based on a single crystal X-ray structure refinement show a rather wide charge distribution for Co sites from +2.15 (Co(4)) to +3.50 (Co(1))
- OSTI ID:
- 21128307
- Journal Information:
- Journal of Solid State Chemistry, Vol. 181, Issue 5; Other Information: DOI: 10.1016/j.jssc.2008.02.024; PII: S0022-4596(08)00106-0; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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