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Enhancement of superconducting critical temperature in Bi(Pb)-Sr-Ca-Cu-O system by Li-doping
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We have studied the superconducting transition of the high-Tc Li-doped Bi(Pb)-Sr-Ca-Cu-O superconductors by the DC-resistivity and AC-susceptibility measurements. It was found that Li+ cations are partially substituted for Cu2+ ions. Doping hole by Lithium substitution was supposed to take place in both OP and IP CuO2 planes. | Enhancement of superconducting critical temperature in Bi(Pb)-Sr-Ca-Cu-O system by Li-doping