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Powder X-ray diffraction and Rietveld analysis of La1−xBaxCoO3 (0<x≤0.5)

Published online by Cambridge University Press:  01 March 2012

Wanju Luo  and
Fangwei Wang
Wanju Luo
Affiliation:
State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Science, P.O. Box 603, Beijing 100080, China
Fangwei Wang
Affiliation:
State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Science, P.O. Box 603, Beijing 100080, China
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Abstract

Detailed structural properties of La1−xBaxCoO3 (LBCO) have been investigated by means of X-ray powder diffraction and Rietveld analysis. A structural phase transformation from R3c to Pm3m at x=0.30–0.35 has been detected based on a comparison between the refinements of R3c and Pm3m. The Co–O bond length of the CoO6 octahedron expanded rapidly with increasing Ba content when x<0.1, and then it leveled off and kept constant at 0.1⩽x⩾0.35, where the Co–O–Co bond angle reaches 180°. The Co–O bond length expansion resumed with increasing Ba content beyond x=0.35.

Keywords

X-ray diffractionRietveld refinementLa1−xBaxCoO3
Type
Technical Articles
Information
Powder Diffraction , Volume 21 , Issue 4 , December 2006 , pp. 304 - 306
Copyright
Copyright © Cambridge University Press 2006

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