Bulletin of Materials Science

, Volume 19, Issue 4, pp 607–613 | Cite as

Synthesis, structure and IR absorption studies of LnBaCuCoO5 (Ln=rare earth) oxides

  • C Shivakumara
  • M S Hegde
  • G N Subbanna
Article

Abstract

A series of oxides LnBaCuCoO5 (Ln=Pr, Nd, Sm, Dy, Gd, Ho and Er) have been synthesized by ceramic method. The oxides crystallize in a tetragonal structure, isostructural to YBaCuCoO5. All the oxides in the series are semiconducting. IR spectra of these oxides show distinct absorption bands at 630 cm−1, 550 cm−1 and 330 cm−1 which are assigned toE,A2 andA1 modes respectively. Doping of holes in these oxides, by calcium substitution in Er1−xCaxBaCuCoO5−x (up tox ⋍ 0·3) was done but, these oxides did not show metallic behaviour.

Keywords

Ceramic method rare earth oxides IR spectra 

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Copyright information

© the Indian Academy of Sciences 1996

Authors and Affiliations

  • C Shivakumara
    • 1
  • M S Hegde
    • 1
  • G N Subbanna
    • 1
    • 2
  1. 1.Solid State and Structural Chemistry UnitIndian Institute of ScienceBangaloreIndia
  2. 2.Materials Research CentreIndian Institute of ScienceBangaloreIndia

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