Abstract

Superconducting YBaCuO thin films were prepared on metallic substrate in an attempt to fabricate a superconducting tape. Deposition was made by co- sputtering from three oxide targets, CuO, Y2O3, and BaCuO2. MgO and BaF2 thin films were found to be an effective buffer layer. All films with good superconducting properties were prepared outside the region of head-on negative ion flux from each target. The highest zero resistance temperature obtained so far of the YBaCuO thin films on metallic tape was 84.0 K in its as grown state, and a critical current density was 4.8x103A/cm2 at zero field and 77.4 K.

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