Fabrication of all-NbN Josephson tunnel junctions using single crystal NbN films for the base electrodes
Conference
·
· IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
OSTI ID:6046984
- Electrotechnical Lab., 1-1-4 Umezono, Tsukuba-shi, Ibaraki 305 (JP)
This paper reports on all-NbN Josephson tunnel junctions with sputter-deposited magnesium oxide barriers fabricated using single crystal NbN films for the base electrodes. Fabricated Josephson junctions have shown good tunneling characteristics with large gap voltages (5.6--5.8 mV), narrow gap widths (0.1--0.2 mV, from 30 to 70%), and small subgap leakage currents (V{sub m} = 20--30 mV, measured at 3 mV). The result of a measurement of a subgap structure for a fabricated junction suggested that the excess leakage currents of fabricated junctions are due to multi-particle tunneling through locally thin areas in the MgO barriers.
- OSTI ID:
- 6046984
- Report Number(s):
- CONF-900944--
- Journal Information:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 27:2; ISSN IEMGA; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Sat Jun 01 00:00:00 EDT 1985
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·
OSTI ID:5993658
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Journal Article
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·
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Conference
·
Thu Feb 28 23:00:00 EST 1991
· IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
·
OSTI ID:6047532
Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
CURRENTS
DIFFUSION BARRIERS
ELECTRIC CURRENTS
ELECTRODES
FABRICATION
FILMS
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAKAGE CURRENT
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
CURRENTS
DIFFUSION BARRIERS
ELECTRIC CURRENTS
ELECTRODES
FABRICATION
FILMS
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAKAGE CURRENT
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM NITRIDES
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
REFRACTORY METAL COMPOUNDS
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS
TUNNEL EFFECT