Noise in DC SQUIDS with Nb/Al-oxide/Nb Josephson junctions

Conference · Wed Mar 01 04:00:00 EST 1989 · IEEE Trans. Magn.; (United States)

OSTI ID:6091803

Cromar, M W; Beall, J A; Go, D; Masarie, K A; Ono, R H; Simon, R W

The authors have developed a process which incorporates very high quality Nb/Al-oxide/Nb Josephson junctions. The junctions had low subgap conductance yielding V/sub m/ greater than 50 mV for critical current densities of 1000 A/cm/sup 2/. Low inductance SQUIDs made with these junctions were apparently free from junction conductance fluctuations, at least for frequencies above 1 Hz. The SQUIDs exhibited flux noise of currently unknown origin.

• Research Organization: National Bureau of Standards, Electromagnetic Technology Div., Boulder, CO (US); TRW, Redondo Beach, CA (US)
• OSTI ID: 6091803
• Report Number(s): CONF-880812-
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CRITICAL CURRENT
CURRENT DENSITY
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FLUX
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
NOISE POLLUTION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLLUTION
REFRACTORY METAL COMPOUNDS
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENT COMPOUNDS