A double dc-SQUID device for flux locked loop operation

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

OSTI ID:6094102

Foglietti, V; Giannini, M E; Petrocco, G ^[1]

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1. IESS-CNR, Via Cineto Romano 42 Rome (IT)

This paper reports on a double dc-SQUID device developed at the CNR-IESS in Roma. It consists of two SQUIDs in cascade configuration with the same electrical parameters but with a different geometry. This structure makes the device particularly suitable for flux-locked-loop operation without need of a modulation flux. Consequently the read-out electronic scheme is greatly simplified without degrading the noise performances of the first stage. The first dc-SQUID has a gradiometer configuration with extra damping resistors shunting the inductance. The technology used is similar to the seven layer IBM process with planar Nb---Nb{sub 2}O{sub 5}---PbAuIn junctions and 2.5{mu}m minimum size lithography.

• OSTI ID: 6094102
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SQUID DEVICES
DESIGN
ELECTRICAL PROPERTIES
GOLD
INDIUM
LAYERS
LEAD
MAGNETIC FLUX
MODE LOCKING
NIOBIUM
NIOBIUM OXIDES
PERFORMANCE
SIGNAL-TO-NOISE RATIO
SUPERCONDUCTING JUNCTIONS
CHALCOGENIDES
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUXMETERS
JUNCTIONS
MEASURING INSTRUMENTS
METALS
MICROWAVE EQUIPMENT
NIOBIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTING DEVICES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
665412* - Superconducting Devices- (1992-)