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
C. Castellano;F. Cordero;O. Palumbo;A. Martinelli;M. Ferretti
2006
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.File in questo prodotto:
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Descrizione: Local Order and Structure in Mn-Substituted Manganites Studied by EXAFS
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