Mössbauer resonance studies on the Ca2Fe2O5-LaFeO3 system |
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| Authors: | Jean-Claude Grenier Léopold Fournès Michel Pouchard Paul Hagenmuller Stanislaw Komornicki |
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| Affiliation: | Laboratoire de Chimie du Solide du C.N.R.S., 351, cours de la Libération, 33405 Talence Cedex, France;Mining and Metallurgy School, Institute of Material Science, Kraków, Poland |
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| Abstract: | Phases between Ca2Fe2O5 and LaFeO3 with La1?2yCa2yFe3+O3?y formulation have been prepared in order to study the oxygen defects in perovskite-related ferrites. X-ray-diffraction analysis and magnetic measurements have confirmed the previous results i.e. the existence of a critical concentration of vacancies above which long range ordering appears. A detailed Mössbauer resonance study shows a continuous evolution of the iron environment, tetrahedra being formed even for low values of y. This result has been discussed and compared with previous ones for homologous CaTi1?2yFe2yO?y phases. |
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