Structural phase transition and magnetic properties of double perovskites Ba{sub 2}CaMO{sub 6} (M=W, Re, Os)
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810 (Japan)
Structures and magnetic properties for double perovskites Ba{sub 2}CaMO{sub 6} (M=W, Re, Os) were investigated. Both Ba{sub 2}CaReO{sub 6} and Ba{sub 2}CaWO{sub 6} show structural phase transitions at low temperatures. For Ba{sub 2}CaReO{sub 6}, the second order transition from cubic Fm3-bar m to tetragonal I4/m has been observed near 120K. For Ba{sub 2}CaWO{sub 6}, the space group of the crystal structure is I4/m at 295K and the transition to monoclinic I2/m has been observed between 220K. Magnetic susceptibility measurements show that Ba{sub 2}CaReO{sub 6} (S=1/2) and Ba{sub 2}CaOsO{sub 6} (S=1) transform to an antiferromagnetic state below 15.4 and 51K, respectively. Anomalies corresponding to their structural phase transition and magnetic transition have been also observed through specific heat measurements.
- OSTI ID:
- 20784901
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 3; Other Information: DOI: 10.1016/j.jssc.2005.10.003; PII: S0022-4596(05)00463-9; Copyright (c) 2005 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
Similar Records
Structures of ordered tungsten- or molybdenum-containing quaternary perovskite oxides
Crystal structures of the double perovskites Ba{sub 2}Sr{sub 1-} {sub x} Ca {sub x} WO{sub 6}