ゲームチェンジをめざした銅酸化物超伝導薄膜および線材の開発 ― 原子レベル制御による120 K 級超伝導線材の開発 ―

松本 要; 吉田 隆; 高野 義彦; 淡路 智; 美藤 正樹

doi:10.2221/jcsj.50.510

Focused Review

Development of Cuprate Superconductor Films and Wires for Game-changing Technology

– A 120 K-class Superconducting Wire Produced by Atomic Level Control –

Kaname MATSUMOTO, Yutaka YOSHIDA, Yoshihiko TAKANO, Satoshi AWAJI, Masaki MITO

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Keywords: critical temperature, irreversibility field, critical current density, strain, artificial pinning center , (Some figures in this article may appear in colour only in the electronic version)

JOURNAL FREE ACCESS

2015 Volume 50 Issue 11 Pages 510-515

DOI https://doi.org/10.2221/jcsj.50.510

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Abstract

High T_c cuprate superconducting films, such as REBa₂Cu₃O_7-_x (RE=Y, Sm, Gd), REBa₂Cu₄O₈ (RE=Y, Yb),(Hg, Re)Ba₂CaCu₂O₆₊_x, (Hg, Re)Ba₂Ca₂Cu₃O₈₊_x, Bi₂Sr₂CaCu₂O₈ and Bi₂Sr₂Ca₂Cu₃O₁₀, have been studied based on “atomic level control” including lattice strain control, carrier control, and nanostructure control, in order to simultaneously improve critical temperature T_c, irreversibility field B_irr, and critical current density J_c of the films. We successfully fabricated high-performance cuprate superconducting films with higher T_c, B_irr, and J_c on IBAD-MgO substrates.

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