Biaxially Aligned High Jc YBCO Tapes on YSZ Buffer Layers Deposited By IBAD Method
High Jc YBCO thin film tapes were continuously fabricated on flexible Ni-based alloy. Biaxially aligned YBCO films were deposited by PLD on textured YSZ buffer layers formed by using IBAD (ion-beam-assisted deposition). For the short sample, Jc value of 1.13×106A/cm22 (77K, OT) was obtained and 1.1×105A/cm2 was maintained at 5T (Bic) with measured length of 1cm. For the long sample, Jc value of 2.1×105A/cm2, and Ic value of 20.8A were obtained (77K, OT) with measured length of 0.7m. Longitudinal uniformity of the long sample was excellent. Self-field a.c. losses of 0.25m length tapes were measured by a.c. four probe method. The results agreed with Norris’ prediction of low a.c. losses for thin strip conductors.
KeywordsYBCO Film Short Sample Hysteresis Loss Strip Conductor YBCO Layer
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