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-Gd2Zr2O7 template films were uniformly and routinely obtained on non-textured Ni-alloy tapes, with FWHM of Deltaphi below 10degrees. Y-123 films with FWHM of Deltaphi below 7degrees 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 CeO2 and Gd2Zr2O7 grown by PLD on IBAD-Gd2Zr2O7 template films were studied. Deltaphi of 3degrees 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 CeO2 buffer layers.