Optimization of intergrain connection in high-temperature superconductor Bi2Sr2CaCu2O x*
Li Cheng-Shan, Zhang Sheng-Nan†, Hao Qing-Bin, Ma Xiao-Bo, Lu Tian-Ni, Zhang Ping-Xiang
       
(a) Critical current density of Bi-2212 bulks measured at 4.2 K in the magnetic field range from 0 to 6 T. (b) Flux pinning force density as a function of reduced magnetic field h = H / H irr.