We report extended X-ray absorption fine structure measurements at the Mn K edge on La0.25Ca0.75Mn0.92Cr0.08O3 samples. Macroscopically, the Mn substitution induces a short range charge-ordered state in spite of the long-range one present in the parent manganite La0.25Ca0.75MnO3. We show how on a local scale the structural EXAFS parameters still confirm the presence, with only a slight reduction, of the features characteristic of the charge ordered un-substituted compounds.
Local order and structure in Mn substituted manganites studied by EXAFS
MARTINELLI, ALBERTO;FERRETTI, MAURIZIO
2005-01-01
Abstract
We report extended X-ray absorption fine structure measurements at the Mn K edge on La0.25Ca0.75Mn0.92Cr0.08O3 samples. Macroscopically, the Mn substitution induces a short range charge-ordered state in spite of the long-range one present in the parent manganite La0.25Ca0.75MnO3. We show how on a local scale the structural EXAFS parameters still confirm the presence, with only a slight reduction, of the features characteristic of the charge ordered un-substituted compounds.
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