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High temperature induced phase transitions in SrCaCoTeO6 and SrCaNiTeO6 ordered double perovskites

A. Zaraq 1 Brahim Orayech 2 A. Faik 2 Josu M. Igartua 3 Alain Jouanneaux 4 Abdeslam El Bouari 1
1 Laboratoire de Physico-Chimie des Matériaux Appliqués (LPCMA), Faculté des Sciences Ben M’Sik, Université Hassan II de Casablanca
2 CICenergigune, Albert Einstein 48, 01510 Miñano, Alava
3 Fisika Aplikatua II Saila, Zientzia eta Teknologia Fakultatea, Euskal Herriko Unibertsitatea, P.O. Box 644, Bilbao 48080
4 IMMM - Institut des Molécules et Matériaux du Mans
Abstract : Two new double perovskites SrCaCoTeO6 and SrCaNiTeO6 have been successfully synthesized via the conventional solid state reaction method. The crystal structures and phase transitions of both materials have been investigated using conventional X-ray powder diffraction method at room- and high-temperatures. The Rietveld analysis has shown that both compounds crystallize at room temperature in a primitive monoclinic perovskite-type structure with P21/n(No. 14) space group and 1:1 ordered arrangement of the B-site cations (Co(Ni)/Te). The high temperature analysis has shown that these materials present temperature induced phase transitions.
Keywords : Double perovskite X-ray diffraction Crystal structure Phase transitions Tellurium family
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https://hal-univ-lemans.archives-ouvertes.fr/hal-02447550
Contributeur : Alain Jouanneaux <>
Soumis le : mardi 21 janvier 2020 - 16:37:47
Dernière modification le : mardi 10 novembre 2020 - 16:45:52

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UNIV-LEMANS | INC-CNRS | CNRS | IMMM-LEMANS

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A. Zaraq, Brahim Orayech, A. Faik, Josu M. Igartua, Alain Jouanneaux, et al.. High temperature induced phase transitions in SrCaCoTeO6 and SrCaNiTeO6 ordered double perovskites. Polyhedron, Elsevier, 2016, 110, pp.119-124. ⟨10.1016/j.poly.2016.02.041⟩. ⟨hal-02447550⟩

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