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    Title: A correlation between the oxygen stoichiometry and Tc of Bi2CaSr2(1−x)Cu2(1−y)O8+δ−2x−2y superconductors
    Authors: Kao, H.-C. I.;Chen, W. L.;Wei, T. P.;Lin, J. C.;Wang, C. M.
    Contributors: 淡江大學化學學系
    Date: 1991-08
    Issue Date: 2013-07-09 15:27:17 (UTC+8)
    Publisher: Amsterdam: Elsevier BV * North-Holland
    Abstract: 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.
    Relation: Physica C: Superconductivity 177(4-6), pp.367-372
    DOI: 10.1016/0921-4534(91)90492-H
    Appears in Collections:[化學學系暨研究所] 期刊論文

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