Development of long Y-123 coated conductors by ion-beam-assisted-deposition and the pulsed-laser-deposition method

100 m class Y-123 coated conductors were produced by using reel-to-reel vacuum ion-beam-assisted-deposition (IBAD) and pulsed-laser-deposition (PLD) apparatuses. 100 m long IBAD-Gd 2 Zr 2 O 7 template films were uniformly and routinely obtained on non-textured Ni-alloy tapes, with FWHM of Δϕ below 10°. Y-123 films with FWHM of Δϕ below 7° were formed on them by PLD. End-to-end I c of 38 A and J c of 0.76 MA cm −2 (77 K, self-field) were obtained in a 100 m long sample. For further texture improvement, secondary buffer layers of CeO 2 and Gd 2 Zr 2 O 7 grown by PLD on IBAD-Gd 2 Zr 2 O 7 template films were studied. Δϕ of 3° and J c of 2.9 MA cm −2 were obtained in a 0.1 m long Y-123 film and J c improved to 1.6 MA cm −2 for an 80 m long Y-123 tape by using the CeO 2 buffer layers.