Intergranular pinning properties in high-Tc superconductor by ac susceptibility response

摘要: Abstract From the ac susceptibility measurements, both intergranular and intragranular peaks in χ″ imaginary part for granular YBa2(Cu0.9Cd0.1)3O7−δ superconductor can be observed clearly. Our finding of exponent n ∼ 1 scaling law temperature dependence critical current density indicates that grain boundary junction should SIS-type. The effective pinning potential is found to inversely proportional power magnetic field. U(T,H,J) obey inverse collective theory. This intergrain Josephson tunneling, which forms as a weak link network, exhibits behaviour.