Critical Current Density of Bi-Pb-Sr-Ca-Cu-O Superconducting Ceramics

Abstract
The critical current densities of Bi-Pb-Sr-Ca-Cu-O ceramics, which have a zero resistance state above 100 K, were studied. The critical current densities at 77 K under a zero magnetic field showed the low values (10∼20 A/cm2) in spite of T c,zero=105 K and decreased drastically by applying the magnetic field.