Publications Details

Thin film preparation and single film device fabrication in the Tl-Ca-Ba-Cu-O HTS system

Ginley, D.S.

Superconducting polycrystalline thin films in the Tl-Ca-Bu-Cu-O system have been prepared by electron beam evaporation followed by appropriate sintering and annealing. Transition temperatures to 110 K and critical current densities to 600,000 A/cm/sup 2/ have been attained in oxygen annealed films. However, with only 16 minutes of air sintering and no oxygen anneal, oriented films have been obtained with T/sub c/'s to 107 K and J/sub c/'s to 450,000 A/cm/sup 2/. Single film devices utilizing a parallel array of weak links and a coplanar control line have been fabricated from the films. Oscillators as well as AM and FM modulators operating between 3 and 6 GHz have been demonstrated using this device concept. 24 refs., 4 figs.