Transport Properties over Critical Currents for Ag-Sheathed Bi2Sr2CaCu2O8 Superconductors with Different E-J Dependence
The current-carrying properties beyond a critical current determined by a voltage criterion for Ag-sheathed Bi2Sr2CaCu2O8 (Ag/Bi2212) superconductors are examined at 10 K and 20 K in magnetic fields. We prepared the in-field heat-treated Ag/Bi2212 wires, in order to obtain the magnetic field alignment microstructure for Ag/Bi2212. The electric field and current density (E-J) properties were evaluated for Ag/Bi2212 wires with and without the in-field heat-treatment. We found that the E-J properties for the in-field heat-treated Ag/Bi2212 wires differ from those for the out-of-field heat-treated ones, and are analogous to the E-J dependence for Bi-system high temperature superconductors with the sintered-like grain morphology.
P. VINCENZINI and A. RIGAMONTI
K. Watanabe et al., "Transport Properties over Critical Currents for Ag-Sheathed Bi2Sr2CaCu2O8 Superconductors with Different E-J Dependence", Advances in Science and Technology, Vol. 47, pp. 118-123, 2006