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    題名: A correlation between the oxygen stoichiometry and Tc of Bi2CaSr2(1-x)Cu2(1-y)O8-2x-2y+deta superconductors
    作者: Kao, H. C. I.;高惠春;Chen, W. L.;Wei, T. P.;Lin, J. C.;王啟銘;Wang, C. M.
    貢獻者: 淡江大學化學學系
    日期: 1991-07
    上傳時間: 2011-10-15 23:09:43 (UTC+8)
    摘要: A series of superconductors with a nominal composition of Bi2CaSr2(1−x)Cu2O8−2x+δ or Bi2CaSr2 Cu2(1−y)O8−2y+δ, where 0≤x, y≤0.6, was prepared under identical conditions at 830°C. Their superconductivity degraded rapidly if x or y was larger than 0.4. from X-ray diffraction studies, it was suggested that vacancies were created when part of the SrO or CuO was removed from the Bi2CaSr2Cu2O8+δ. The extra oxygen stoichiometry, δ, decreased with increasing x but increased with increasing y. When δ was in between 0.04 and 0.18, Tc(zero) of Bi2CaSr2Cu2O8+δ was not dependent on δ and it was found to be about 60 K. Above this range, Tc(zero) decreased rapidly.
    關聯: Physica C 177(4-6), pp.367-372
    DOI: 10.1016/0921-4534(91)90492-H
    顯示於類別:[化學學系暨研究所] 期刊論文
    [化學工程與材料工程學系暨研究所] 期刊論文


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