Dc SQUID magnetometers from single layers of YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]]
Journal Article
·
· Applied Physics Letters; (United States)
- Department of Physics, University of California, Berkeley, California 94720 (United States) Materials Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
We have fabricated magnetometers patterned in a single layer of YBa[sub 2]Cu[sub 3]O[sub 7[minus][ital x]] involving dc superconducting quantum interference devices (SQUIDs) with bicrystalline grain boundary junctions. The magnetometers consist of either a SQUID with a large area square washer or a single turn pickup loop coupled directly to the body of a small area SQUID. We found that the transfer function falls off with increasing SQUID inductance much more rapidly than predicted; implications for magnetometer performance are discussed. When operated at 77 K with a bias reversal technique a directly coupled magnetometer had a noise of (105[plus minus]10) fT Hz[sup [minus]1/2] at 1 kHz, increasing to (145[plus minus]10) fT Hz[sup [minus]1/2] at 1 Hz.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5920660
- Journal Information:
- Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 63:16; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Sun Dec 26 23:00:00 EST 1993
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·
OSTI ID:5403900
Related Subjects
36 MATERIALS SCIENCE
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONIC EQUIPMENT
EQUIPMENT
FABRICATION
FILMS
FLUXMETERS
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
MAGNETOMETERS
MEASURING INSTRUMENTS
MICROSTRUCTURE
MICROWAVE EQUIPMENT
NOISE
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRONIC EQUIPMENT
EQUIPMENT
FABRICATION
FILMS
FLUXMETERS
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
MAGNETOMETERS
MEASURING INSTRUMENTS
MICROSTRUCTURE
MICROWAVE EQUIPMENT
NOISE
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES