SUPERCONDUCTING THIN FILM SUBSTRATE AND SUPERCONDUCTING THIN FILM, AND SUPERCONDUCTING THIN FILM SUBSTRATE MANUFACTURING METHOD

摘要

A superconducting thin film having excellent critical current characteristics is provided. A substrate for a superconducting thin film includes a substrate body (10A) having a main surface (10B) in which the root mean square slope R”q of a roughness curve is 0.4 or less.