Multilevel YBaCuO flux transformers with high T sub c SQUIDs: A prototype high T sub c SQUID magnetometer working at 77 K

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.105549· OSTI ID:5551006

Oh, B; Koch, R H; Gallagher, W J; Robertazzi, R P; Eidelloth, W ^[1]

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1. IBM Research Division, T. J. Watson Research Center, Yorktown Heights, New York 10598 (US)

We have constructed optimized high {ital T}{sub {ital c}} YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO) multiturn flux transformers using laser-deposited films patterned with ion milling and only photolithographic masking. A five-turn flux transformer with a 0.5{times}0.5 mm{sup 2} pickup loop was coupled to a YBCO superconducting quantum interference device (SQUID) made on a separate substrate to demonstrate a prototype high {ital T}{sub {ital c}} SQUID magnetometer with all components working at 77 K. There was no additional noise associated with the input coil and transformer. The magnetic field sensitivity of the 0.5{times}0.5 mm{sup 2} magnetometer was 3.8 pT/{radical}Hz at 77 K and 1 kHz.

• OSTI ID: 5551006
• Journal Information: Applied Physics Letters; (USA), Vol. 59:1; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FLUXGATE MAGNETOMETERS
FABRICATION
OPERATION
HIGH-TC SUPERCONDUCTORS
USES
BARIUM OXIDES
COPPER OXIDES
LOW TEMPERATURE
QUATERNARY COMPOUNDS
SIGNAL-TO-NOISE RATIO
SQUID DEVICES
SUPERCONDUCTING COILS
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
MAGNETOMETERS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
426001* - Engineering- Superconducting Devices & Circuits- (1990-)