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JOSEPHSON JUNCTION OF OXIDE-BASED SUPRACONDUCTORS AND ITS MANUFACTURING PROCESS

Assignee: NTT Inc
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Filing: 1980-11-04
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Granted: —
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Expires: 2000-11-04
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Abstract

Abstract Translated from French La présente invention décrit une jonction tunnel Josephson comportant une première et seconde couches électrodes (16,20) supraconductrices superposées formées de pellicules minces de matières supraconductrices à d'oxyde à structure pérowskite du type BaP1-x Bix O3 . Une couche-barrière 19 placée entre les couches électrodes (16,20) supraconductrices est une pellicule mince ayant une longue durée de vie qui est stable et ne se brise pas au cours des cycles thermiques allant de la température ordinaire aux températures extrêmement basses. Cette pellicule 19 est faite d'un oxyde à structure pérowskite qui a la même structure cristalline et le même coefficient de dilatation thermique que celui des première et seconde couches (16,20) supraconductrices, cette pellicule 19 fonctionnant comme un isolant ou un semiconducteur. L'oxyde à structure perowskite peut être BaSnO 3 , Ba 1-y Sry Pb1-x Bix O3 (où 0 =< x =< 0,3, y > 0,3) ou BaPb1-x (A1-y Biy )O3 où A est au moins V, Nb, Ta et Sb; 0,1 =< x =< 0,3; et 0 =< y =< 0,5). Utilisation de cette jonction pour les supraconducteurs à base d'oxyde. The present invention describes a Josephson tunnel junction comprising a first and second superimposed superconducting electrode layers (16,20) formed from thin films of oxide superconducting materials with a perowskite structure of the BaP1-x Bix O3 type. A barrier layer 19 placed between the superconductive electrode layers (16,20) is a thin film having a long life which is stable and does not break during thermal cycles from room temperature to extremely low temperatures. This film 19 is made of an oxide with a perowskite structure which has the same crystalline structure and the same coefficient of thermal expansion as that of the first and second superconducting layers (16,20), this film 19 functioning as an insulator or a semiconductor. The oxide with perowskite structure can be BaSnO 3, Ba 1-y Sry Pb1-x Bix O3 (where 0 = <x = <0.3, y> 0.3) or BaPb1-x (A1-y Biy) O3 where A is at least V, Nb, Ta and Sb; 0.1 = <x = <0.3; and 0 = <y = <0.5). Use of this junction for oxide-based superconductors.

Inventors

  • 👤 Minoru Suzuki
  • 👤 Toshiaki Murakami
  • 👤 Takahiro Inamura
  • 👤 Takashi Inukai
  • 👤 Youichi Enomoto

Bibliographic Details

Application Number —
Jurisdiction FR
Data Source google_patents
Last Synchronized 2026-11-05 13:00
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/10; H10N60/12; H10N60/01; H10N60/0912; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/816; Y10S505/817; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014

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