High pressure synthesis and structure of a new magnetoplumbite-type cobalt oxide SrCo 12O 19
Abstract
A new magnetoplumbite-type hexagonal cobalt oxide, SrCo 12O 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 12O 19 and related compounds suggest the presence of localized spins with a uniaxial anisotropy at the trigonal bipyramidal site.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- May 2008
- DOI:
- 10.1016/j.jssc.2008.02.024
- Bibcode:
- 2008JSSCh.181.1273I