Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-19T13:23:02.514Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

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