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Structural Study of Tl2Ba2Can-1CunO4+2n (n=1, 2 and 3) by Powder X-Ray Diffraction

  • Y. Shimakawa
  • Y. Kubo
  • T. Manako
  • Y. Nakabayashi
  • H. Igarashi
Conference paper

Abstract

Crystal structures of Tl2Ba2Can-1CunCO4+2n (n = 1, 2 and 3) determined by powder X-ray diffraction were refined using Rietveld analysis. The results of the Rietveld analysis revealed that as n increased the lattice parameter, a, and the interatomic distance Cu(1)-O(2) became shorter, and the Tl-0 and Ba-0 layers showed a tendency to become flatter. Possible substitution of about 10% of the Ca-sites with Tl ions in the 2212 and 2223 phases was also suggested. In our experiments, some samples with similar diffraction patterns showed different Tc–s. In particular, in the Tl-Ba-Cu-O system, a wide range of behaviors varying between non-superconductivity and a Tc of 80K was observed. These difference in Tc–s may be related to substitution effects, modulated structures, and intergrowth structures.

Keywords

Interatomic Distance Rietveld Refinement Substitution Effect Rietveld Analysis Occupation Factor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Japan 1989

Authors and Affiliations

  • Y. Shimakawa
    • 1
  • Y. Kubo
    • 1
  • T. Manako
    • 1
  • Y. Nakabayashi
    • 1
  • H. Igarashi
    • 1
  1. 1.Fundamental Research LaboratoriesNEC CorporationMiyamae-ku, Kawasaki, 213Japan

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