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

The transition-metal perovskites SrFel.,Cox03 (0 i x 51) are of a great interest because the high oxidation states of the transition-metal (Fe(IV), Co(N)) 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 SrFel.&ox0,.5 brownmilleritetype compounds [I-31. The starting materials and the phases obtained after electrochemical processing have been characterized by X-ray powder diffraction, chemical analysis and 5 7 ~ e Mossbauer spectroscopy. Finally, the magnetic and transport properties have been studied.