Accession Number : ADA233473


Title :   Superconducting Electronic Film Structures


Descriptive Note : Final rept. 1 Jan 1988-31 Dec 1990


Corporate Author : WESTINGHOUSE SCIENCE AND TECHNOLOGY CENTER PITTSBURGH PA


Personal Author(s) : Gavaler, J R ; Talvacchio, J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a233473.pdf


Report Date : 14 Feb 1991


Pagination or Media Count : 210


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.


Descriptors :   *SUPERCONDUCTORS , SUPERCONDUCTIVITY , ELECTRONICS , LAYERS , STRUCTURAL PROPERTIES , STRUCTURES , FILMS , ELECTRONIC EQUIPMENT , ORIENTATION(DIRECTION) , EPITAXIAL GROWTH , SUBSTRATES , MICROWAVE EQUIPMENT , TUNNELS , SURFACES , BARRIERS , SIDES , SEMICONDUCTING FILMS , SPUTTERING , RADIOFREQUENCY , BUFFERS , CONTROL


Subject Categories : Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE