METHOD FOR GRINDING TAPE BASE MATERIAL FOR OXIDE SUPERCONDUCTOR, OXIDE SUPERCONDUCTOR, AND BASE MATERIAL FOR OXIDE SUPERCONDUCTOR

摘要

PROBLEM TO BE SOLVED: To provide a method for grinding a surface for improving a crystal orientation on a surface of a tape-like metallic base material to improve a critical current of a superconducting thin film.

SOLUTION: This oxide superconductor comprises a tape-like base material 110, an intermediate layer formed on the tape-like base material 110, and an oxide superconducting thin film formed on the intermediate layer. This method for grinding a ground face of the tape-like base material includes a step for grinding the ground face while continuously traveling the tape-like base material 110, and the grinding step includes an initial grinding 103 and a finish grinding 104. Finally, average surface roughness Ra of the ground face becomes 2 nanometer or less, and an inplane orientationΔϕof the intermediate layer becomes 5°or less.

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