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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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References

Barman, A., Ghosh, M., De, S. K., and Chatterjee, S. (1997). “Electrical transport properties of bulk La1−xBaxCoO3 at low temperature,” Phys. Lett. A PYLAAG 10.1016/S0375-9601(97)00594-X 234, 384–390.CrossRefGoogle Scholar
Fauth, F., Suard, E., and Caignaert, V. (2001). “Intermediate spin state of Co3+ and Co4+ ions in La0.5Ba0.5CoO3 evidenced by Jahn-Teller distortions,” Phys. Rev. B PRBMDO 10.1103/PhysRevB.65.060401 65, 060401(1)–(4).CrossRefGoogle Scholar
Goodenough, J. B. (1958). “An interpretation of the magnetic properties of the perovskite-type mixed crystals La1−xSrxCoO3−λ,” J. Phys. Chem. Solids JPCSAW 10.1016/S0022-3697(01)00142-1 6, 287–297.CrossRefGoogle Scholar
Hunter, B. A. (1998). “Rietica-A Visual Rietveld Program,” in Commission on Powder Diffraction Newsletter, Vol. 20, p. 21.Google Scholar
Khalil, M. S. (2003). “Synthesis, X-ray, infrared spectra and electrical conductivity of La∕Ba–CoO3 systems,” Mater. Sci. Eng., A MSAPE3 10.1016/S0921-5093(02)00557-9 352, 64–70.Google Scholar
Mandal, K. D., Behera, L., and Ismail, K. (2001). “Characterization of La1−xBaxCoO3 synthesized at low temperature,” J. Alloys Compd. JALCEU 325, L17–L19.CrossRefGoogle Scholar
Mandal, P., Choudhury, P., Biswas, S. K., and Ghosh, B. (2004). “Transport and magnetic properties of La1−xBaxCoO3,” Phys. Rev. B PRBMDO 10.1103/PhysRevB.70.104407 70, 104407(1)–(8).Google Scholar
Muta, T., Kobayashi, Y., and Asai, K. (2002). “Magnetic, electronic transport, and calorimetric investigations of La1−xCaxCoO3 in comparison with La1−xSrxCoO3,” J. Phys. Soc. Jpn. JUPSAU 10.1143/JPSJ.71.2784 71, 2784–2791.Google Scholar
Patil, S. B., Keer, H. V., and Chakrabarty, D. K. (1979). “Structural, electrical, and magnetic properties in the system BaxLa1−xCoO3,” Phys. Status Solidi A PSSABA 52, 681–686.CrossRefGoogle Scholar
Wang, C., Xiao, M., Hu, J., Chen, L., Zhang, C., Lan, J., Yu, H., and Liu, D. (1998). “Conductivity and infrared absorption of La1−xBaxCoO3 conductive ceramics,” J. Solid State Chem. JSSCBI 137, 211–213.CrossRefGoogle Scholar
Wu, J. and Leighton, C. (2003). “Glassy ferromagnetism and magnetic phase separation in La1−xSrxCoO3,” Phys. Rev. B PRBMDO 10.1103/PhysRevB.67.174408 67, 174408(1)–(16).Google Scholar