OXIDE SUPER-CONDUCTIVE MATERIAL AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide a new oxide super-conductive material, especially a Y123-based oxide super-conductive material suitable for using a large electric current or a high frequency or using in a magnetic field, and capable of simply imparting a prescribed pinning effect on its production. SOLUTION: This oxide super-conductive material has a crystal structure of a type: Ln1+xBa2-xCu3O7-y (-0.1<=x<=0.5, y≈(1-x)/2, and including a crystal in which a part of or the whole of elements in its crystallographic atomic positions are substituted by other elements), and it is possible to introduce a pinning center by containing 0.001-2 at.% carbon atoms.