OXIDE SUPERCONDUCTIVE WIRE AND ITS USAGE

摘要

PROBLEM TO BE SOLVED: To provide an oxide superconductive wire and its usage capable of preventing fracture of a filament by evaporative expansion of liquid nitrogen. SOLUTION: A plurality of pin holes 1a is formed on a metal cladding material 1. A ratio of a total area S of the plurality of pin holes 1a in a surface of the metal cladding material 1 per unit length of a wire 3 to a surface area Sa11 of the metal cladding material 1 per unit length of the wire 3 is >=1%.