OXIDE SUPERCONDUCTING WIRE, SUPERCONDUCTING STRUCTURE, METHOD OF PRODUCING OXIDE SUPERCONDUCTING WIRE, SUPERCONDUCTING CABLE, SUPERCONDUCTING MAGNET, AND PRODUCT INCORPORATING SUPERCONDUCTING MAGNET

摘要

The invention offers an oxide superconducting wire, a superconducting structure, a method of producing an oxide superconducting wire, a superconducting cable, a superconducting magnet, and a product incorporating the superconducting magnet. The oxide superconducting wire is a tape-shaped oxide superconducting wire in which a plurality of filaments, each of which has a Bi-2223-based oxide superconductor, are embedded in a matrix. The oxide superconducting wire has a cross-sectional area of at most 0.5 mm² in a cross section perpendicular to the direction of its length. In the cross section of the oxide superconducting wire, the filaments have an average cross-sectional area per filament of at least 0.2% and at most 6% of the cross-sectional area of the oxide superconducting wire. Having the above features, the oxide superconducting wire can not only increase its critical current density but also decrease its AC loss.