SUPERCONDUCTING THIN FILM AND WIRE AND THE PROCESS THEREFOR

摘要

Improvement in a superconducting thin film of compound oxide represented by the formula : LnBa2Cu3O7- delta (Ln is lanthanide) or (La1-x alpha x)2CUO4 ( alpha is Ba or Sr) deposited on a substrate or core made of MgO, SrTiO3 or ZrO2 by physical vapour deposition technique. The present invention is characterized by the surface roughness Rmax (datum length = 1,000 mu m) of the superconducting thin film being is less than 0.2 mu m