Thin film of Ln2-xcexcuo4-y single crystal and process for producing the same.

摘要

A thin film of a single crystal of an oxide having a composition formula of Ln2-xCexCuO4-y wherein Ln is at least one rare earth element selected from the group consisting of Pr, Nd, and Sm and x is a number of 0.14 to 0.18, wherein the (001) plane of the single crystal is parallel with the film surface, which thin film exhibits superconductivity without post-treatment. The film is produced by simultaneously evaporating Ln, Ce, and Cu from discrete evaporation sources while supplying oxygen gas close to the substrate surface.