摘要
One of the key problems for the potential application of high T_c superconductors is the low value of J_c, the critical current density, in grains and its even lower value in grain boundary. The former is due to a weak pinning in grains and the latter is due to the disorder existing in grain boundary (also called as 'weak link') and short superconductive coherent length. So the J_c of the high T_c superconductors made by sintering only has the value of 10~3 A/cm^2.
基金
Project supported by the National Center for the Research of Superconductivity
the Open Laboratory for High Performance Ceramics and Superfine Structure
