Preparation and study of NiO buffer layer for superconducting coated conductor

A randomly oriented NiO growth is an important problem for the preparation of superconducting coated conductor.A simple and valid method is to prepare textured NiO film on the bare nickel tape.In this paper,NiO film was prepared in air by the surface oxidation epitaxial method.High temperature and short time are in favor of the growth of smooth and densification NiO film.We obtained the smooth and densification NiO film at optimal temperature and for optimal time.The buffer layer of SmBiO3 was fabricated on the NiO film.This provides a potential value of the substrate for preparing superconducting layer.