Abstract
The structure, the energetics and the internal redox reactions of La 0.7Sr 0.3Fe x Mn 1− x O 3 have been studied in the complete solid solution range 0.0< x<1.0. High temperature oxide melt drop solution calorimetry was performed to determine the enthalpies of formation from binary oxides and the enthalpy of mixing. There is a noticeable change in the energetics of the solid solution near x=0.7, which is due to the growing concentration of Fe 4+ at higher Fe/(Fe+Mn) ratio. The balance between different valences of the transition metals, Mn and Fe, is the main factor in determining the energetics of the La 0.70Sr 0.30Fe x Mn 1− x O 3 solid solution.
Published Version
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