摘要
The ac magnetic susceptibility,the magnetoresistance R(H)and the dependence of the resistivity on temperature under different applied field were investigated in the Pb-doped Bi-Ca-Sr-Cu-O system.A superconducting phase with Tc-100K exists tn this sintered sample.It forms a well connecting network,and therefore the Josephson coupling between the superconducting grains is sharply improved by doping lead.
