Superconducting electronic-film structures. Annual report, 1 January-31 December 1986

Technical Report · Tue Jan 20 04:00:00 EST 1987

OSTI ID:6479615

Braginski, A I; Gavaler, J R

Bulk samples of the newly discovered La-Sr-Cu-O superconductors were made that have critical onset temperatures over 38 K. The greater effectiveness of impurities (oxygen) compared to epitaxy for the stabilization of stoichiometric A15 Nb-Ge was demonstrated. The positive effect of oxides on the formation of A15 Nb-A1 was also shown. Experiments involving the deliberate addition of a contaminant (methane) during barrier deposition provided a major advance in the understanding of the processes required for producing high-quality NbN-MgO-NbN junctions. A model for predicting the orientation of single-crystal Nb and Nb-Sn films on sapphire was experimentally verified. Results obtained indicate that epitaxy is essential for NbN-MgO-NbN trilayer processing if the junction is to be operated above 4.2 K.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
• OSTI ID: 6479615
• Report Number(s): AD-A-179134/2/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
360603* -- Materials-- Properties
420201 -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALLOYS
ALUMINIUM ALLOYS
BETA-W LATTICES
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DEPOSITION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
GERMANIUM ALLOYS
HYDROCARBONS
IMPURITIES
JUNCTIONS
LANTHANUM COMPOUNDS
LAYERS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METHANE
NIOBIUM ALLOYS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SAMPLING
STRONTIUM COMPOUNDS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TIN ALLOYS
TRANSITION ELEMENT COMPOUNDS