Investigation of the SrFe1-xCoxO3 (0≤x≤1) Cubic Perovskites Obtained by Electrochemical Oxidation

Léopold Fournès (1) , Alain Wattiaux (1) , Alain Demourgues (1) , Petr Bezdicka (1) , Jean-Claude Grenier (1) , Michel Pouchard (1) , Jean Etourneau (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

The transition-metal perovskites SrFe1-xCoxO3 (0≤x≤1) are of a great interest because the high oxidation states of the transition-metal (Fe(IV), Co(IV)) can be stabilized. Moreover these compounds exhibit interesting magnetic properties. These oxygen stoichiometric phases have been prepared only under high oxygen pressures. A novel preparation method of these phases has been investigated using electrochemical oxidation of the SrFe1-xCoxO2.5 brownmillerite-type compounds [1-3]. The starting materials and the phases obtained after electrochemical processing have been characterized by X-ray powder diffraction, chemical analysis and 57Fe Mössbauer spectroscopy. Finally, the magnetic and transport properties have been studied.

Mots clés: Perovskites; Oxidation; Electrochemistry; Transition metal

Domaines: Articles anciens

Léopold Fournès, Alain Wattiaux, Alain Demourgues, Petr Bezdicka, Jean-Claude Grenier, et al.. Investigation of the SrFe1-xCoxO3 (0≤x≤1) Cubic Perovskites Obtained by Electrochemical Oxidation. Journal de Physique IV Proceedings, 1997, 07 (C1), pp.C1-353-C1-354. ⟨10.1051/jp4:19971143⟩. ⟨jpa-00254787⟩