Superconductivity and structure in sputtered Nb-Ta multilayers

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.37.60· OSTI ID:5742975

Broussard, P R; Geballe, T H

The structure and superconducting properties of sputtered Nb-Ta multilayers are studied as a function of the bilayer period ..lambda... The films are mosaic structures with single-crystal diffraction profiles. The elastic mean free paths in both the niobium and tantalum layers are larger than the layer thicknesses. The measured transition temperatures and perpendicular critical field slopes are compared to the predictions of proximity theory. The parallel critical fields and angular dependences are examined for the occurrence of a three-dimensional to two-dimensional crossover.

• Research Organization: Naval Research Laboratory, Washington, D.C. 20375-5000
• OSTI ID: 5742975
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
COATINGS
CORUNDUM
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
LAYERS
METALS
MINERALS
NIOBIUM
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PROXIMITY EFFECT
SAPPHIRE
SPUTTERING
SUBSTRATES
SUPERCONDUCTIVITY
TANTALUM
TRANSITION ELEMENTS
VAPOR DEPOSITED COATINGS