Superconducting element and its manufacturing method

Abstract

Abstract PURPOSE:To make it possible to form a desired or excellent superconductive film even if various kinds of substrates are used by providing an intermediate layer on the substrate before a superconductive film is formed on the desired substrate, and then providing a transition layer. CONSTITUTION:In this structure, a transition layer 3 is laminated on a substrate 1 through an intermediate Iayer 2, then a superconductive film 4 is laminated. The thermal expansion coefficient of the intermediate Iayer 2 is made similar or equal to the thermal expansion coefficient of the substrate 1. The composition of the transition layer 3 in the laminating direction is changed from the composition of the intermediate layer 2 into the composition of the superconductive film. Therefore, stress strain becomes hard to occur at the interface between the substrate 11 and the intermediate layer 2. The stress strain at the interface due to the disagreement in thermal expansion coefficients of the intermediate layer 2 and the superconductive film 4 is alleviated with the transition layer 3. As a result, durability and heat resistance as the element as a whole are improved.

Inventors

• 👤 Keisuke Yamamoto
• 👤 敬介 山本
• 👤 Norio Kaneko
• 👤 典夫 金子
• 👤 Takehiko Kawasaki
• 👤 岳彦 川崎

Bibliographic Details