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Magnetic and transport properties of high-pressure synthesized perovskite cobalt oxide (Sr1– x Ca x )CoO3 (0⩽x⩽0.8)
- Source :
-
Journal of Solid State Chemistry . Nov2005, Vol. 178 Issue 11, p3431-3436. 6p. - Publication Year :
- 2005
-
Abstract
- Abstract: Polycrystalline perovskite cobalt oxides (Sr1– x Ca x )CoO3 (0⩽x⩽0.8) were synthesized under high pressure (6GPa) and high temperature (1200–1300 °C) conditions. Powder X-ray diffraction data confirmed that they have cubic perovskite structures. The end member of the solid solution, SrCoO3, exhibited a ferromagnetic transition with Curie temperature of and metallic electric conductivity. With increasing the Ca content , increased slightly to 286K at then decreased rapidly to 148K for . The origin of the ferromagnetism is discussed in relation to the spin state of the Co4+ ions. The present system showed a relatively large (∼5.5%) negative magnetoresistance for or 0.2 in the vicinity of T c. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00224596
- Volume :
- 178
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Journal of Solid State Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 19085187
- Full Text :
- https://doi.org/10.1016/j.jssc.2005.08.019