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The influence of Sn doping on superconductivity in the Bi-based 2212 phase is studied in this paper. For the samples R–T relations and magnetic hysteresis loops were measured. X-ray powder diffraction analysis was also performed. For Bi1.75Pb0.25Sr2CaCu2.3−xSnxOy, the experimental results show that by adding the proper amount of Sn the superconductivity of the samples can be improved. As x =...
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