Structural and magnetic properties of perovskite Ca{sub 3}Fe{sub 2}WO{sub 9}
- Department of Inorganic Materials, Karpov' Institute of Physical Chemistry, Vorontsovo pole, 10 103064 Moscow K-64 (Russian Federation)
- Department of Environmental Inorganic Chemistry, Chalmers University of Technology, SE-412 96, Goeteborg (Sweden)
- Department of Materials Chemistry, Angstrom Laboratory, Box 538, University of Uppsala, SE-751 21, Uppsala (Sweden)
A complex perovskite with composition Ca{sub 3}Fe{sub 2}WO{sub 9} has been synthesised, and the temperature evolution of nuclear and magnetic structures investigated by neutron powder diffraction. It was shown that at room temperature this compound adopts a monoclinic perovskite structure belonging to space group P12{sub 1}/n1 (a=5.4180(5)A, b=5.5093(5)A, c=7.7031(7)A), {beta}=90.04(2){sup o}). The partial B-site ordering, of the Fe{sup +3} and W{sup +6} cations, at (2c) and (2d) sites was determined. At low temperatures the magnetic diffraction peaks were registered and a possible model for the magnetic structure was proposed in accordance with the ferrimagnetic properties of the title compound. The magnetic structure is defined by a propagation vector k=(1/2,1/2,0) and can be described as an array of ferromagnetic (20-1) layers, which couple antiferromagnetically to each other. All the Fe moments within a layer are aligned parallel (or anti-parallel) to the c-axis. The structural and magnetic features of this compound are discussed and compared with those of some other quaternary oxides A{sub 3}Fe{sub 2}WO{sub 9} (A=Ba, Sr, Pb)
- OSTI ID:
- 20784804
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 12; Other Information: DOI: 10.1016/j.jssc.2005.08.012; PII: S0022-4596(05)00376-2; 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
Structural, Magnetic, and XPS Studies of the Double-Perovskite Mn{sub 2}VSbO{sub 6}
A structure and phase analysis investigation of the ''1:1'' ordered A{sub 2}InNbO{sub 6} perovskites (A=Ca{sup 2+}, Sr{sup 2+}, Ba{sup 2+})