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Powder X-ray diffraction and Rietveld analysis of La1−xCaxMnO3(0<X<1)

Published online by Cambridge University Press:  01 March 2012

P. R. Sagdeo ,
Shahid Anwar  and
N. P. Lalla
P. R. Sagdeo*
Affiliation:
UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452017, India
Shahid Anwar
Affiliation:
UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452017, India
N. P. Lalla
Affiliation:
UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore-452017, India
*
a)Electronic mail: sagdeo@csr.ernet.in
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Abstract

Single-phase samples of La1−xCaxMnO3 compounds have been synthesized by solid-state reaction. Detailed Rietveld analysis of powder X-ray diffraction data showed that La1−xCaxMnO3 undergoes a structural phase transformation from R-3c to Pnma at X=0.05–0.075. There is a linear variation of lattice parameters as a function of calcium concentration. The slope of this linear variation changes at X=0.6. A correlation between observed Mn-O bond lengths, corresponding to different compositions, and possible magnetic phases is discussed.

Keywords

manganitesX-ray powder diffractioncrystal structureRietveld method
Type
Technical Articles
Information
Powder Diffraction , Volume 21 , Issue 1 , March 2006 , pp. 40 - 44
Copyright
Copyright © Cambridge University Press 2006

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