Method of producing an SrTiO.sub.3 /YBa.sub.2 Cu.sub.3 O.sub.7 layer system and a layer system as thus produced as a high-temperature superconductor

US5430014A · kind A · utility

Assignee

• Forschungszentrum Jülich GmbH · DE

Inventors

• Helmut Soltner · Jülich, DE
• Ulrich Poppe · Cologne, DE
• Knut Urban · Lich, DE

Key dates

• Filing date: Oct 30, 1992
• Grant date: Jul 4, 1995
• Expiry date: Oct 30, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/731
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

c-axis oriented YBa.sub.2 Cu.sub.3 O.sub.7 layers are grown with intervening SrTiO.sub.3 layers bridged over steps at which there is a transformation to a-axis crystal-oriented growth. The multilayer superconductor has YBa.sub.2 Cu.sub.3 O.sub.7 layers which are not thicker than 500 nm while the intervening layers of SrTiO.sub.3 have thicknesses of 20 to 30 nm.