Accession Number : AD0752593

Title :   Device Application of High Temperature Superconductors.

Descriptive Note : Final rept. 1 Mar 69-31 Oct 71,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : Nisenoff,Martin

Report Date : 31 OCT 1972

Pagination or Media Count : 36

Abstract : Superconducting cylindrical films of niobium with superconducting transition temperatures Tc of about 9K and of niobium nitride with Tc of about 10K were prepared by dc sputtering procedures. A sputter etch technique was developed to sculpture into these films narrow constrictions (0.5 micrometer wide or less) that exhibit good edge definition and are reproducible from film to film. Although the rf impedance of these sculptured films does not vary periodically with applied magnetic flux, it appears that successful operation of these devices might be observed if the thicknesses of these films are reduced. Recommendations for future developmental work on preparing dependable and reliable weak link devices from Nb and NbN films are given, along with suggestions for research programs directed toward demonstrating the feasibility of using these devices in Naval operational systems. (Author)

Descriptors :   (*SUPERCONDUCTORS, MANUFACTURING), FILMS, NIOBIUM, NIOBIUM COMPOUNDS, NITRIDES, SPUTTERING, SUPERCONDUCTIVITY, MAGNETOMETERS

Subject Categories : Electrical and Electronic Equipment
      Fabrication Metallurgy
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE