Propiedades magnéticas y espectroscopia mössbauer en compuestos perovskita doble Sr2(Fe1-xScx)ReO6 (x = 0.05, 0.1).
- Gómez, I. 1
- Hernández, T. 13
- Plazaola Muguruza, Fernando 3
- Barandiarán García, José Manuel 3
- Greneche, J. M. 2
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1
Universidad Autónoma de Nuevo León
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- 2 UMR
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3
Universidad Politécnica de Valencia
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ISSN: 0366-3175
Year of publication: 2003
Volume: 42
Issue: 5
Pages: 317-321
Type: Article
More publications in: Boletín de la Sociedad Española de Cerámica y Vidrio
Abstract
We have synthesised by the modified Pechini method the following polycrystalline double perovskite samples: Sr2 Fe1- x Scx ReO6 (x = 0.05, 0.1). They have been characterised by X-ray, magnetic measurements and Mössbauer spectrometry. X-ray patterns showed that the double perovskites are well crystallized. The difference in size between Fe3+ and Sc3+ atomic radii does not cause large structural changes in compared to the parent Sr2 FeReO6 compound. The Curie temperatures are found at 426 and 435 (± 5) K for Sr2 Fe0.95Sc0.05ReO6 and Sr2 Fe0.9Sc0.1ReO6 respectively. The Mössbauer spectra measured at 77 K showed a complex hyperfine structure which result from different magnetic contributions at Fe sites, the average hyperfine field was estimated 50 T and the isomer shift at 0.5 mm/s consequently the iron ions stay in a trivalent state.