Emission Mössbauer study of oxygen deficient PrBa2Cu3(57Co)O6+x

Z. Homonnay, E. Kuzmann, M. Gál, S. Nagy, A. Vértes, L. Pöppl, A. Nath, Gy Vankó

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The variation of Mössbauer parameters as a function of oxygen content in PrBa2Cu3(57Co)O6+x has been studied and compared to the results of similar studies on YBa2Cu3(57Co)O6+x. It was found that the Mössbauer isomer shift of 57Co(57Fe) dopant at Cu(1) site shows the same behaviour as for YBa2Cu3(57Co)O6+x except that all isomer shifts are significantly higher than those for YBa2Cu3(57Co)O6+x and several other superconducting 1-2-3 compounds. These findings are explained by the tendency of PrIII to form PrIV, which can be responsible for the absence of superconductivity, and charge transfer between the Cu(2)-O sheets and Cu(1)-O chains. It is also concluded that at high oxygen stoichiometries the Cu(1)-O chains have metallic character for both compounds.

Original languageEnglish
Pages (from-to)137-140
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number1-3
Publication statusPublished - Apr 20 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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