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Praseodymium Deficiency Effects on the Physical Properties of Pr0.7−x□Sr0.3MnO3 Perovskite Manganites

The praseodymium deficiency effects on the structural, magnetic, and electrical properties of the lacunar perovskite manganite oxides Pr0.7−x□xSr0.3MnO3 (0≤x≤0.23) have been investigated. This study is of great interest because it gives more information on the role of the Mn cation oxidation degree....

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Bibliographic Details
Published in:Journal of solid state chemistry 2001-01, Vol.156 (1), p.68-74
Main Authors: Boujelben, W., Cheikh-Rouhou, A., Joubert, J.C.
Format: Article
Language:English
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Summary:The praseodymium deficiency effects on the structural, magnetic, and electrical properties of the lacunar perovskite manganite oxides Pr0.7−x□xSr0.3MnO3 (0≤x≤0.23) have been investigated. This study is of great interest because it gives more information on the role of the Mn cation oxidation degree. Powder X-ray diffraction patterns are indexed in the rhombohedral perovskite structure with the R3c space group for x=0 to 0.1 and in the orthorhombic one with the Pbnm space group for x=0.15 to 0.23. Magnetization and resistivity measurements versus temperature show that all of our samples exhibit a semiconducting paramagnetic–metallic ferromagnetic transition when the temperature decreases.
ISSN:0022-4596
1095-726X
DOI:10.1006/jssc.2000.8964