Characterization of NbN films and tunnel junctions

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5922770

Stern, J A; LeDuc, H G ^[1]

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1. Center for Space Microelectronics Technology, Jet Propulsion Lab., California Inst. of Technology, Pasadena, CA (US)

This paper discusses properties of NbN films and NbN/MgO/NbN tunnel junctions. NbN junctions are being developed for use in high-frequency, superconductor-insulator-superconductor (SIS) quasiparticle mixers. To properly design mixer circuits, junction and film properties need to be characterized. The specific capacitance of NbN/MgO/NbN junctions has been measured as a function of the product of the normal-state resistance and the junction area (R{sub m}A), and it is found to vary by more than a factor of two (35--85 fF/{Mu}m{sup 2}) over the range of R{sub m}A measured (1000--50 {Omega}{mu}m{sup 2}). This variation is important because the specific capacitance determines the RC speed of the tunnel junction at a given R{sub m}A value. The magnetic penetration depth of NbN films deposited under different conditions is also measured.

• OSTI ID: 5922770
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAPACITANCE
DESIGN
ELECTRIC CONDUCTIVITY
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
FABRICATION
FILMS
JUNCTIONS
MICROELECTRONICS
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
PENETRATION DEPTH
PHYSICAL PROPERTIES
PNICTIDES
QUASI PARTICLES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT