NDLI: Preparation and performance of toroidal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/-RF SQUIDs

Content Provider	IEEE Xplore Digital Library
Author	Zhang, Y. Diegel, M. Heiden, C.
Copyright Year	1965
Abstract	Starting from disk-shaped bulk specimens of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/ with T/sub c/ near 90 K, RF SQUIDs (superconducting quantum interference devices) to toroidal topology with a permanently adjusted mill-bridge contact were prepared. Contact trimming was done by reducing the cross section so that a good SQUID signal was obtained at 77 K. The SQUIDs were sealed after the adjustment in order to prevent degradation by moisture. Using conventional 20-MHz readout electronics the SQUIDs were operated in the flux-locked loop mode. Flux noise of the order of 10/sup -4/ Phi /sub 0// square root Hz was obtained at 77 K in the white region of the spectrum, with excess noise below about 100 Hz. The devices are quite robust due to their monolithic structure and demonstrate good stability against thermal cycling.<>
Sponsorship	IEEE Magnetics Society
Starting Page	869
Ending Page	871
Page Count	3
File Size	273885
File Format	PDF
ISSN	00189464
Volume Number	25
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	SQUIDs Superconducting device noise Robust stability Radio frequency Superconducting devices Radiofrequency interference Circuit topology Degradation Moisture Readout electronics
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Radio frequency bias current scheme for dc superconducting quantum interference device

Low temperature synthesis of Y-Ba-Cu oxide films and preparation of DC-SQUIDs

Current phase relation of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/(-/spl delta/) step edge junction

Demonstration of monolithic co-fabrication of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7- delta / and CMOS devices on the same sapphire substrate

Characterization of ramp edge-geometry Ag:YBa/sub 2/Cu/sub 3/O/sub 7-x//PrBa/sub 2/Cu/sub 3/O/sub 7-x//Ag:YBa/sub 2/Cu/sub 3/O/sub 7-x/ junctions and dc SQUIDs

Effect of RF interference on characteristics of DC SQUID system

NdBa/sub 2/Cu/sub 3/O/sub 7/ bicrystal Josephson junctions and SQUIDs operating at 77 K

A YBa/sub 2/Cu/sub 3/O/sub 7/ thin film SQUID gradiometer for measurements in unshielded space

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

Preparation and performance of toroidal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/-RF SQUIDs

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Preparation and performance of toroidal Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-x/-RF SQUIDs