| 摘要 |
PURPOSE:To stabilize the elementary characteristic by using an oxide as material to a base board, wherein the oxide consists of component elements similar to those which constitute a composite oxide superconductor of Ln-M-Cu-O type, and thereby eliminating thermal stress/strain between the base board and film from high temp. thru low. CONSTITUTION:A composite superconductor consisting of Ln, M, Cu, O is formed as a film on an electrical insulative base board, to provide a film type superconductive element. Thus superconductor in the composition LnM2Cu3O7-k (where Ln is one of La, Nd, Pm, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, Y; M is one of Ba, Sr, Ca; and k shall range 0<k<1) is formed as a film 2 on oxide base board 1 in the composition Er2MCuO5.
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