Correlation between Tc and hole concentration in the cation-substituted Bi2Sr2CaCu2O8+δ system

Yoji Koike, Yoshihiro Iwabuchi, Syoichi Hosoya, Norio Kobayashi, Tetsuo Fukase

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107 Citations (Scopus)


Correlation between superconducting Tc and hole concentration was investigated in the Bi2Sr2CaCu2O8+δ system. The hole concentration was varied by substituting cations with different valences for Sr or Ca. In order to increase the hole concentration, some samples were annealed at 430°C in 250 bar of oxygen pressure. We find that Tc increases, takes a maximum at the hole concentration corresponding to 0.2-0.3 holes per CuO2 unit, and then decreases, with increasing hole concentration. This correlation is markedly similar to those in the La2-xSrxCuO4 and YBa2Cu3O7-δ systems.

Original languageEnglish
Pages (from-to)105-110
Number of pages6
JournalPhysica C: Superconductivity and its applications
Issue number1-2
Publication statusPublished - 1989 Jun 1

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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