NDLI: Low-noise, single-layer YBa/sub 2/Cu/sub 3/O/sub 7-x/ DC SQUID magnetometers at 77 K

Content Provider	IEEE Xplore Digital Library
Author	Cantor, R. Lee, L.P. Teepe, M. Vinetskiy, V. Longo, J.
Copyright Year	2002
Abstract	We describe a low-noise dc Superconducting QUantum Interference Device (SQUID) magnetometer that is fabricated from a single layer of YBa/sub 2/Cu/sub 3/O/sub 7-x/ on a 2 cm/spl times/2 cm bicrystal substrate. The magnetometer design consists of a single-turn pickup loop that is directly coupled to a low inductance SQUID. Using conventional flux-locked loop electronics with bias current reversal, the white flux noise of several of these magnetometers operated at 77 K is observed to be as low as 2.2 /spl mu//spl Phi//sub 0///spl radic/Hz above 10 kHz, increasing to about 5.7 /spl mu//spl Phi//sub 0///spl radic/Hz at 1 Hz. The field-to-flux conversion efficiency is measured to be 4.6 nT//spl Phi//sub 0/, resulting in a white magnetic field noise of to fT//spl radic/Hz above 10 kHz, increasing to 26 fT//spl radic/Hz at 1 Hz.<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2927
Ending Page	2930
Page Count	4
File Size	390047
File Format	PDF
ISSN	10518223
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	SQUID magnetometers White noise Superconducting device noise Magnetic field measurement Superconducting devices Superconducting epitaxial layers Interference Couplings Inductance Current measurement
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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DC-SQUIDs and flux transformers in YBa/sub 2/Cu/sub 3/O/sub 7/ magnetometers at 77 K

Inductance measurements in YBa/sub 2/Cu/sub 3/O/sub 7/ DC SQUID's with a submicrometer line width

A new concept for integrated YBa/sub 2/Cu/sub 3/O/sub 7/ magnetometers

Direct-coupled high T/sub c/ DC SQUID gradiometer with single layer YBa/sub 2/Cu/sub 3/O/sub 7/

SQUID magnetometer noise measurements on YBa/sub 2/Cu/sub 3/O/sub 7/ thin films and input coils

DC-SQUIDs of YBa/sub 2/Cu/sub 3/O/sub 7/ with artificial PrBa/sub 2/Cu/sub 3/O/sub x/ barriers

Superconductivity in YBa/sub 2/Cu/sub 3/O/sub 7//PrBa/sub 2/Cu/sub 3/O/sub 7/ superlattices

Preparation and characterization of planar YBa/sub 2/Cu/sub 3/O/sub x/ flux transformers

Integrated YBa/sub 2/Cu/sub 3/O/sub 7/ multi-loop magnetometers at 77 K

Low-noise, single-layer YBa/sub 2/Cu/sub 3/O/sub 7-x/ DC SQUID magnetometers at 77 K

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