Journal of Alloys and Compounds
Magnetization measurements on lead- or tin-doped YBa2Cu3O7 have been performed at 4.2 K in magnetic fields up to 29 T. The critical current densities are deduced from the irreversible magnetization and the pinning forces are evaluated. The effect of both lead and tin doping on the critical current density is quite appreciable. In particular, the critical current density of the sample doped with lead is more than twice that of the undoped sample. This effect is thought to be associated with the enhancement of the intergranular coupling of grains through the formation of BaPbO3 phase at the interface of the 123 superconducting phase. The relationship between the critical current density and a micrograph of the tin-doped sample is also discussed.
关键词:
transport critical current;y1ba2cu3ox
Solid State Communications
Textured YBa2Cu3O7 samples were prepared by the Melt Spun Texture Growth (MSTG) process. Magnetization measurements have been performed at 4.2 K in magnetic fields up to 38 T, applied parallel and perpendicular to the preferential growth direction. The critical current densities are deduced from the irreversible magnetization and the pinning forces have been evaluated.
关键词:
transport critical current;y1ba2cu3ox
