Advanced development of IBAD/PLD coated conductors at FUJIKURA

Abstract

We have developed an ion-beam-assisted-deposition (IBAD) and a pulsed-laser-deposition (PLD) technique to produce REBa2Cu3Ox (RE123, RE: rare earth) coated conductors with high performances. Distributions of critical currents (Ic) in the longitudinal direction were improved in most wires routinely fabricated under optimized process. A typical wire showed Ic of 460 A/cm at 77 K and self-field, about 200 A/cm at 65 K and 3 T and about 300 A/cm at 50 K and 5 T. In addition, further high Ic values over 800 A/cm were also obtained in thick films. Finally, we succeeded in fabricating an 816.4 m long wire with end-to-end Ic of 572 A/cm, corresponding to the new world record Ic × L value of 466,981 Am/cm.