A planar gradiometer based on a microwave rf-SQUID
- Institute of Thin Film and Ion Technology, Research Centre Julich GmbH, P.O. Box 1913, 5170 Julich (DE)
This paper describes a type of gradiometer, working on the basis of a planar microwave rf SQUID. In this type of rf-SQUID, a superconducting half-wavelength stripline resonator serves as tank circuit, into which the SQUID is integrated. If a gradiometer configuration is used for the SQUID (i.e. two loops), a certain asymmetry of the stripline resonator should be provided to ensure sufficient coupling between gradiometer and resonator. For first experiments, gradiometers were prepared from thin Niobium films on sapphire substrates, having either microbridges or tunnel junctions as Josephson elements. When operated in hysteretic mode, modulation voltages of about 100 {mu}V were measured for both microbridge- and tunnel junction SQUIDs.
- OSTI ID:
- 5923891
- 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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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAVITY RESONATORS
CORUNDUM
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FABRICATION
FILMS
FLUXMETERS
JUNCTIONS
MEASURING INSTRUMENTS
METALS
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
MINERALS
NIOBIUM
OXIDE MINERALS
RADIATIONS
RESONATORS
RF SYSTEMS
SAPPHIRE
SQUID DEVICES
SUBSTRATES
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENTS
TUNNEL EFFECT