Transport and Mechanical Property Evaluation for Cu Stabilized PLD-${hbox{GdBa}}_{2}{hbox{Cu}}_{3}{hbox{O}}_{rm y}$ Coated Conductor

摘要

Transport properties and mechanical properties were investigated for a Cu stabilized PLD-${hbox{GdBa}}_{2}{hbox{Cu}}_{3}{hbox{O}}_{rm y}$ (GdBCO) coated conductor. The conductor consists of a 100-$mu{hbox{m}}$ thick Hastelloy substrate, buffer layers, a 1.5- $mu{hbox{m}}$ thick superconducting layer, and a 100-$mu{hbox{m}}$ thick copper stabilizer. Critical currents were measured up to 600 A in magnetic fields (parallel and perpendicular to the conductor surface) up to 12 T and in temperatures ranging from 4.2 to 85 K. Temperature dependence of $n$-value was also evaluated. Mechanical property was evaluated by measuring stress/strain dependence of critical current at 77 K, self-field. Delamination property was also evaluated at room temperature using the cleavage delamination test method for adhesive bonds. The delamination propagates at GdBCO/ ${hbox{CeO}}_{rm 2}$ interface.