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Title of Journal: Appl Phys A

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Abbravation: Applied Physics A

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Springer Berlin Heidelberg

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1432-0630

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Study of Na substitution in LaSubscript067/Sub

Authors: S Hcini M Boudard S Zemni
Publish Date: 2013/08/28
Volume: 115, Issue: 3, Pages: 985-996
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Abstract

The effect of Na substitution on nominal La067Ba033−x Na x MnO3 0≤x≤033 manganites is studied in this work Detailed chemical and structural analyses on ceramic samples obtained at 1200 ∘C show that a significantly lower Na rate than the nominal one is obtained due to important Na losses during the synthesis The losses of Na result in the appearance of impurity phases for high nominal Na rates in addition to the manganite phase with a rhombohedral Rbar3c structure Structural and physical properties of the samples can be properly interpreted according to the variation of the Mn3+/Mn4+ ratio and the average ionic radius of Asite when the experimental composition of the manganite is considered

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