Ramesha, K. ; Sebastian, L. ; Eichhorn, B. ; Gopalakrishnan, J. (2003) Pb2FeReO6: new defect pyrochlore oxide with a geometrically frustrated Fe/Re sublattice Journal of Materials Chemistry, 13 (8). pp. 2011-2014. ISSN 0959-9428
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Official URL: http://www.rsc.org/Publishing/Journals/JM/article....
Related URL: http://dx.doi.org/10.1039/B304118M
Abstract
Nominal Pb2FeReO6 adopts a defect pyrochlore structure at ambient pressure unlike the other A2FeReO6 (A = Ca, Sr, Ba). Rietveld refinement of the crystal structure of one of the compositions Pb2FeReO6.1 from powder XRD data shows that the structure is cubic pyrochlore (α = 10.382 Å ; space group: Fd3m) where oxygen vacancies occur at O2 (8b) sites. The divergence between the ZFC and FC magnetic susceptibility data and the non-Arrhenius resistivity behaviour of Pb2FeReO6 compositions are characteristic of the underlying geometrically frustrated Fe/Re cation sublattice in the pyrochlore structure.
Item Type: | Article |
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Source: | Copyright of this article belongs to Royal Society of Chemistry. |
ID Code: | 12937 |
Deposited On: | 11 Nov 2010 08:23 |
Last Modified: | 16 May 2016 22:11 |
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