Structure and magnetism in hexagonal tungsten bronze metal oxides AM(1/3)W(8/3)O(9) (A-K, Rb, Cs; M-Cr, Fe)
2015 (English)In: Solid State Sciences, ISSN 1293-2558, Vol. 40, 44-49 p.Article in journal (Refereed) Published
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.
Oxides, Bronze structure, Dielectrics, Magnetics
Physical Sciences Engineering and Technology
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-247412DOI: 10.1016/j.solidstatesciences.2014.12.012ISI: 000349449900007OAI: oai:DiVA.org:uu-247412DiVA: diva2:796760