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Nuclear and Magnetic Structure of Ba3Fe2WO9
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Materials Chemistry. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Materials Chemistry, Structural Chemistry. strukturkemi.
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2004 (English)In: Materials Research Bulletin, Vol. 39, 615-628 p.Article in journal (Refereed) Published
Abstract [en]

The complex perovskite with composition Ba3Fe2WO9 (BFWO) has been synthesised, and the evolution of nuclear and magnetic structures with temperature has been investigated by neutron powder diffraction. It was shown that at room temperature this compound adopts the 6H-perovskite structure, space group P63/mmc (a=5.7584(2) Å, c=14.1019(9) Å), in which the cation sites within the face-sharing octahedra are occupied by Fe and W cations and those within the corner-sharing octahedra are occupied by Fe exclusively. The magnetic diffraction peaks were registered at low temperatures and a possible model for the magnetic structure was proposed in accordance with the ferrimagnetic properties of BFWO. The magnetic structure can be described as an array of ferromagnetic layers of Fe moments along the c-axis, and adjacent layers coupled antiferromagnetically. Structural and magnetic features of this compound are discussed and compared with those of other quaternary oxides adopting the 6H-perovskite structure.

Place, publisher, year, edition, pages
2004. Vol. 39, 615-628 p.
Keyword [en]
Ceramics, Neutron scattering, Crystal structure, Magnetic structure
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-67865DOI: doi:10.1016/j.materresbull.2003.12.007OAI: oai:DiVA.org:uu-67865DiVA: diva2:95776
Available from: 2006-03-21 Created: 2006-03-21 Last updated: 2011-01-12

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Tellgren, RolandRundlöf, Håkan

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