| 摘要 |
PURPOSE:To make a superconductive material, which is high in its superconductive critical temperature Tc, usable as a wire with high stability of its superconductive characteristic and a large degree of freedom in its size by using a specific composite oxide thin film and a flexible substrate which supports this thin film. CONSTITUTION:There are used the following matters: a composite oxide thin film, which is 1 mum or less in thickness and indicated in a formula (Ax-1,Bx)CyDz, and a flexible substrate, which supports this thin film. In this formula, A is one species selected from group IIa, IIIa elements in a periodic table, B is one species selected from group IIa, IIIa elements in the periodic table and includes the same elements as contained in A, C is one species selected from group Ib, IIb, IIIb, VIIIa elements in the periodic table, D is one species selected from the following elements; O, B(boron), C(carbon), N, F, S, x is an atomic ratio of B to A+B and defined in 0.1<=x<=0.9, y and z are atomic ratios defined in 0.4<=y<=3.0 and 1<=z<=5 respectively when (Ax-1Bx) is one.
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