Effects of elemental substitution for the (Pb, Cu)O layer of Pb-1212 High-temperature Oxide Superconductors and their Oxygen Nonstoichiometry

DOI IR (HANDLE) Open Access
  • Ohtaki Michitaka
    Department of Materials Science and Technology, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Kataoka Jun
    Toyota Industries Corporation
  • Eguchi Koichi
    Department of Materials Science and Technology, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • Arai Hiromichi
    Department of Materials Science and Technology, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University

Bibliographic Information

Other Title
  • Pb-1212 系酸化物高温超電導体における (Pb, Cu)O 層への元素置換効果と酸素不定比性

Search this article

Description

The Pb site in the (Pb, Cu)O layer of the Pb-1212 oxide superconductor (Pb0.75Cu0.25)Sr2(Y0.5Ca0.5)Cu2O7+z is partially substituted by metals M=Li, Bi, In, Sn, and Sb. The Bi substitution at 5 mol% markedly depresses the superconductivity, whereas the substitution by Sb and In raises the superconducting critical temperatures for the electrical resistivity and the ac magnetic susceptibility. The thermogravimetric analysis reveals an enhancement of oxygen deficiency in the Bi-substituted sample. The iodometric titration confirms the large amount of oxygen defect which causes decrease in the hole concentration on the Bi substitution. The hole doping by the substitution with Sb and In appears to be efficient because of the lower ionic valence of these cations and the increased oxygen content in the samples.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390853649767036416
  • NII Article ID
    110000156311
  • NII Book ID
    AN00055101
  • DOI
    10.15017/17362
  • HANDLE
    2324/17362
  • Text Lang
    ja
  • Article Type
    departmental bulletin paper
  • Data Source
    • JaLC
    • IRDB
    • CiNii Articles
  • Abstract License Flag
    Allowed

Report a problem

Back to top