Superconducting Electronic Film Structures
Abstract
The objective was to obtain both an understanding and control of superconducting and normal-state properties of layered, mostly epitaxial film structures incorporating high-critical-temperature oxide superconductors. Fulfillment is a step in the development of a technology base for superconducting electronics capable of operating is above the temperature of 50k, particularly for passive devices. The technology is based primarily on single-crystal YBCO films deposited by single-target sputtering. Based on a wide variety of characterization techniques, including tunneling and rf surface resistance, they are equal or superior to films made by any other method. Microwave devices fabricated with such films (in other programs at Westinghouse) showed markedly improved performance compared to conventional devices. The capability of sputtering YBCO films on large areas and on both sides of substrates was developed. State-of-the-art TBCCO and LSCO films were also prepared and evaluated. Procedures were developed for control of film orientation. Particular attention was given to film surfaces and interfaces with substrates, epitaxial buffer layers, and tunnel barriers. Specific results of the program are detailed in published papers appended to this report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 1991
- Accession Number
- ADA233473
Entities
People
- J. R. Gavaler
- J. Talvacchio