【摘 要】
：
It is well known that in the Bi-series superconductors, low temperature phases, such as 2201, 2212 phases, always coexist with 2223 phase to some extent, which
【机 构】
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Department of Chemistry, Central South University of Technology, Changsha 410083, China,Department o
【出 处】
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Chinese Science Bulletin
论文部分内容阅读
It is well known that in the Bi-series superconductors, low temperature phases, such as 2201, 2212 phases, always coexist with 2223 phase to some extent, which makes it difficult to prepare high-T_c 2223 phase samples. Doping of Pb and F can help the forming of 2223 phase and the superconductors with zero resistance temperature 107 K and 118 K can be obtained. But so far most experimental results have pointed out that it is difficult to obtain
It is well known that in the Bi-series superconductors, low temperature phases, such as 2201, 2212 phases, always coexist with 2223 phase to some extent, which makes it difficult to prepare high-T 2222 phase samples. Doping of Pb and F can help the forming of 2223 phase and the superconductors with zero resistance temperature 107 K and 118 K can be obtained. But so far most experimental results have pointed out that it is difficult to obtain
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