Effect of oxygen concentration on superconductivity of Bi-Sr-Ca-K-Cu-O compounds

Han Zhiyi, Mao Zhiqiang, Wang Yu, Chen Qun, Zhang Ning, Zhou Zhe, Chao LieZhao, Cheng Zhaojia, Zhou Guien, Zhang Yuheng

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Abstract

In order to study the relation between the oxygen content and superconductivity samples of Bi2Sr2Ca1-xKxCu2Oy (x=0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0) were prepared and treated under different conditions. It was found that the superconducting properties are sensitive to the oxygen concentration and the Tc,zero of Bi2Sr2Ca1-xKxCu2Oy can be shifted over a range of about 22 K by the changing oxygen concentration; no structural difference induced by oxygen were observed. The change in superconducting properties may be the result of a change in Cu average valence state. In addition, the change in superconducting phase with K+ concentration is also studied.

Original languageEnglish (US)
Pages (from-to)29-33
Number of pages5
JournalJournal of Superconductivity
Volume4
Issue number1
DOIs
StatePublished - Feb 1991

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

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