Fabrication of Y-Ba-Cu-O Superconducting Films on Cu Substrates by an Electrophoretic Deposition Technique

Abstract

Direct formation of Y₁Ba₂Cu₃O_7-x films on Cu substrates by electrophoretic deposition is studied, Electrophoretic deposition was carried out using presintered Y₁Ba₂Cu₃O_7-x powder dispersed in distilled acetone. The deposited films were annealed in air at 900°C. We succeeded in obtaining superconducting Y₁Ba₂Cu₃O_7-x films on Cu substrates. The films on Cu plates and Cu film/YSZ exhibited the zero-resistance state at 66 K and 76 K, respectively. Interfacial chemical reactions at the Y₁Ba₂Cu₃O_7-x /Cu interface are discussed. The achievement of the zero-resistance state is considered to be due to the reduction of the interfacial reactions.