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Structure and magnetism in hexagonal tungsten bronze metal oxides AM(1/3)W(8/3)O(9) (A-K, Rb, Cs; M-Cr, Fe)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2015 (English)In: Solid State Sciences, ISSN 1293-2558, E-ISSN 1873-3085, Vol. 40, 44-49 p.Article in journal (Refereed) Published
Abstract [en]

The structure and magnetic properties of hexagonal tungsten bronzes AM(1/3)W(8/3)O(9) (A-K+, Rb+, Cs+; M- Cr3+, Fe3+) have been investigated. Pure ceramic samples were synthesized by solid-state reaction. The samples have been studied by X-ray powder diffraction in combination with magnetic measurements. The compounds crystallize in hexagonal space group P6(3)/mcm. The substitution of magnetic ions into the WO6 octahedra yields dilute antiferromagnetic Cr3+-O2--Cr3+(or Fe3+-O2--Fe3+) superexchange interaction causing the appearance of short-range magnetic order at low temperatures. The antiferromagnetic character of the interaction is supported by negative values of the derived Curie-Weiss temperatures, qCW. The magnitude of qCW is found to decrease with increasing ionic radius of the A cation. 

Place, publisher, year, edition, pages
2015. Vol. 40, 44-49 p.
Keyword [en]
Oxides, Bronze structure, Dielectrics, Magnetics
National Category
Physical Sciences Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-247412DOI: 10.1016/j.solidstatesciences.2014.12.012ISI: 000349449900007OAI: oai:DiVA.org:uu-247412DiVA: diva2:796760
Available from: 2015-03-20 Created: 2015-03-18 Last updated: 2017-12-04Bibliographically approved

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Ivanov, Sergey A.Mathieu, RolandNordblad, Per

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