Abstract
We have fabricated YBa2Cu3O7−x (YBCO) multi-layer films by pulsed laser deposition (PLD) method on a metallic substrate. The multi-layer structure was composed of YBCO and YBCO with the bamboo structure, which is the columnar microstructure of YBCO/BaZrO3 (BZO) and is effective for pinning. From the transmission electron microscopy (TEM), the bamboo structure was well-established on the YBCO layer. In a magnetic field angular dependence of Ic, it seemed that the anisotropy was improved in the multi-layer film. It was considered that the insertion of the YBCO layer into the bamboo layer contributes to random pinning for the magnetic field vertical to the c-axis, and then the anisotropy was improved.
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