Patent ID: 7371586

Claim:
A method of producing a superconductor wire, comprising the step of forming a superconducting layer on a base layer by performing a film deposition at least three times without substantially changing an oxygen gas pressure between the at least three times, wherein the oxygen gas pressure is below atmospheric pressure, wherein a film thickness of a superconducting film made in each film deposition is 0.3 μm or less and the superconducting layer having a layer thickness of 1.5 μm to 3 μm is formed on the base layer and wherein the base layer is composed of a substrate or composed of the substrate and a buffer layer disposed thereon, wherein in either case, a portion of the base layer adjacent to the superconducting layer has a biaxial orientation, the substrate is composed of Ni, Cr, Mn, Co, Fe, Pd, Cu, Ag, Au or an alloy composed of at least two of Ni, Cr, Mn, Co, Fe, Pd, Cu, Ag or Au and the buffer layer is composed of a metal oxide containing at least one metal element having a crystal structure a pyrochlore-type, a florite-type, a rock salt-type, or a perovskite-type.