A Mössbauer spectroscopy investigation of SrFe1-xScxO3-δ perovskites

Polycrystalline samples of oxygen deficient perovskites SrFe1−xScxO3−δ (0 ≤ x ≤ 0.5) have been synthesized by direct solid state reactions. Each compound has been stabilized with two different oxygen stoichiometries. The structural study shows, firstly, the good cationic homogeneity of the samples a...

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Bibliographic Details
Published in:Solid state sciences 2010-05, Vol.12 (5), p.739-744
Main Authors: RIZKI, Youssef, LE BRETON, Jean-Marie, FOLCKE, Emeric, LECHEVALLIER, Luc, BREARD, Yohann, MAIGNAN, Antoine
Format: Article
Language:English
Subjects:
Chemical Sciences
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Material chemistry
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:Polycrystalline samples of oxygen deficient perovskites SrFe1−xScxO3−δ (0 ≤ x ≤ 0.5) have been synthesized by direct solid state reactions. Each compound has been stabilized with two different oxygen stoichiometries. The structural study shows, firstly, the good cationic homogeneity of the samples and, secondly, that the Sc and Fe atoms are randomly distributed over the same crystallographic site, whatever the scandium content. This implies that no anionic order is possible. A detailed Mossbauer spectroscopy study clearly shows that the substitution of scandium for iron involves an oxygen content decrease which decreases the tetravalent iron content until its total disappearance for x = 0.5. The evolutions of the isomer shift, the quadrupolar splitting and the relative intensity versus the Sc3+ content are depicted in the present paper.
ISSN:1293-2558
1873-3085
DOI:10.1016/j.solidstatesciences.2010.02.027