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Title: Structural and magnetic properties of perovskite Ca{sub 3}Fe{sub 2}WO{sub 9}

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)
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Department of Inorganic Materials, Karpov' Institute of Physical Chemistry, Vorontsovo pole, 10 103064 Moscow K-64 (Russian Federation). E-mail: ivan@cc.nifhi.ac.ru
  2. Department of Environmental Inorganic Chemistry, Chalmers University of Technology, SE-412 96, Goeteborg (Sweden). E-mail: stene@inoc.chalmers.se
  3. Department of Materials Chemistry, Angstrom Laboratory, Box 538, University of Uppsala, SE-751 21, Uppsala (Sweden). E-mail: rte@mkem.uu.se
  4. Department of Materials Chemistry, Angstrom Laboratory, Box 538, University of Uppsala, SE-751 21, Uppsala (Sweden)
Publication Date:
OSTI Identifier:
20784804
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 178; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CALCIUM COMPOUNDS; IRON COMPOUNDS; IRON IONS; LAYERS; MAGNETIC PROPERTIES; MONOCLINIC LATTICES; NEUTRON DIFFRACTION; OXIDES; PEROVSKITE; SPACE GROUPS; TEMPERATURE RANGE 0273-0400 K; TUNGSTEN IONS; VANADIUM COMPOUNDS