H. Liu
University of Science and Technology of China
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Physics Letters A | 1989
Xianglei Mao; H. Liu; Quan Du; Wei-Jie Zhang; Zhiqiang Mao; Ling Zhou; Yu Wang; Yuheng Zhang
Abstract Upper critical magnetic fields of the Bi 1.9− x Pb x Sb 0.1 Sr 2 Ca 2 Cu 3 O y system with x = 0.2, 0.3, 0.4 and 0.5 were measured by a magnetoresistance method with a pulsed magnetic field. The H c 2 (0) are estimated to be 181, 370, 416 and 195 T for x = 0.2, 0.3, 0.4 and 0.5 respectively. The variation of T c with x is comparatively small. The X-ray diffraction shows that there is no obvious change in structure. It suggests that the Biue5f8O plane in the system influences the superconductivity strongly.
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