Superconducting Y-Ba-Cu-O Tapes Fabricated by Excimer Laser Deposition

Thin film Y-Ba-Cu-O superconducting tapes with the length up to 20cm were successfully prepared using a continuous laser deposition technique. Sintered yittria-stabilized zirconia tapes were used as flexible substrates. The as-grown Y-Ba-Cu-O films were highly c-axis oriented over the full length of the tape. The critical current density(Jc) at 77.3K of 3.4×104A/cm2 was obtained for 15cm voltage tap spacing. The highest value of local Jcs was 6.8×104A/cm2 (1cm spacing). The critical current(Ic) of 3.5A was achieved for 15cm voltage tap spacing. The crystal orientations and the morphological feature of the thin film tape are discussed in connection with the Jc values. The effect of bending strain on the Jc were also determined.