Study of the crystal and magnetic structures of La0.3Ca0.7Fe1-xCrxO3-¿ solid solution
ABO3 oxides accommodate a variety of chemical compositions, crystallize with several structures in competition and develop diverse physical properties, being intensively studied in the search for new functional materials. Transition metal oxides with perovskite structure are of major interest, where A/B chemical substitution is a common strategy towards physical properties modification. Attainability of very rich phase diagrams are proven by, eg.La1-xCaxMnO3 system, with different electronic/magnetic properties, and charge ordering effects, that can be controlled via chemical composition. We propose the study of the La0.3Ca0.7Fe1-xCrxO3-¿ oxygen deficient perovskite solid solution for harnessing thermoelectric energy. Preliminary NPD data on one sample showed two high temperature structural transitions at ~800 and 600K from Pnma to R3c. Bulk magnetic properties of our samples reveal magnetic anomalies at these T, also related with different thermoelectric behaviors. The compositional range covers an unusual n- to p-like behavior. A high resolution and thermodiffrantion study on D2B will provide insight on the phase diagram and further understanding on their physiscal properties.
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Elena Solana-Madruga; OSTOJIC Maja; Jesus Prado-Gonjal and RITTER Clemens. (2025). Study of the crystal and magnetic structures of La0.3Ca0.7Fe1-xCrxO3-¿ solid solution. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-24-761
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