OXIDE SUPERCONDUCTOR, SUPERCONDUCTING WIRE, AND A METHOD OF MANUFACTURING THE SAME

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An oxide superconductor has a composition expressed by REaBabCu3O7-x, where RE represents one rare earth or a combination of two or more of a rare earth, a satisfies 1.05≦a≦1.35, b satisfies 1.80≦b≦2.05, and x represents an amount of oxygen deficiency, and a non-superconducting phase having an outer diameter of 30 nm or less is included in a superconducting phase.