The features of structural transformations in lanthanum manganites La{sub 1−x}A{sub x}MnO{sub 3+δ} (A = Ca, Sr, Ba)

In this work, the effect of the ionic radius and concentration of a doping element on the features of the structural transformations in polycrystalline lanthanum manganites, La{sub 1−x}A{sub x}MnO{sub 3+δ} (A = Ca, Sr, Ba), has been studied by Mössbauer spectroscopy and X-ray diffraction analysis. F...

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Bibliographic Details
Main Author: Sedykh, Vera D.
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CONCENTRATION RATIO
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
IRON 57
LANTHANUM COMPOUNDS
MANGANATES
PHASE TRANSFORMATIONS
POLYCRYSTALS
STRONTIUM COMPOUNDS
X-RAY DIFFRACTION
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Summary:In this work, the effect of the ionic radius and concentration of a doping element on the features of the structural transformations in polycrystalline lanthanum manganites, La{sub 1−x}A{sub x}MnO{sub 3+δ} (A = Ca, Sr, Ba), has been studied by Mössbauer spectroscopy and X-ray diffraction analysis. For Mössbauer investigations, a small amount of {sup 57}Fe (2 at%) Mössbauer isotope was introduced into the samples. It follows from the analysis of the obtained data that both common features of the structural transformations and differences between them exist in lanthanum manganites depending on ionic radius and concentration of a doping element.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4898613