Research of long IBAD–PLD coated conductors with high quality

Abstract

Long YBa2Cu3Ox (Y-123) coated tapes were produced by reel-to-reel continuous processes using Ion-Beam-Assisted Deposition (IBAD) and Pulsed-Laser-Deposition (PLD). Biaxially textured Gd2Zr2O7 buffer layers up to 255m long were fabricated by IBAD with the production speed of 0.5–1.0m/h. Y-123 films were formed on them by PLD with the tape speed of 1.0–4.0m/h. A 105m long Y-123 film was formed with the uniform thickness of 1.0μm and the Δϕ of 3–4°. The end-to-end Ic of 126A was achieved at 77K, 0T, whose I–V curve had the n-value of 28.5. The Ic times length reached 13,230Å. Another 70m long Y-123 tape with the Ic of over 90A (77K, 0T) was wound into a solenoid type magnet whose inner diameter was 60mm. The central magnetic field of 0.082T was obtained at 77K, with operating current of 42A and that of 0.27T was obtained at 66K, with operating current of 130A.