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

Content Provider	IEEE Xplore Digital Library
Author	Matsuda, M. Matachi, A. Kuriki, S.
Copyright Year	1965
Abstract	The authors have synthesized superconducting Y-Ba-Cu oxide thin films by RF sputtering at a relatively low substrate temperature (about 650 degrees C). Films of 300-700 nm thickness have Tc of 60-72 K without annealing after the deposition. A preferential orientation with a c-axis perpendicular to the surface was observed. DC SQUIDs (superconducting quantum interference devices) having two parallel microbridges with constriction of submicrometer to 40- mu m width were fabricated from the oxide films by chemical etching. The microbridges with greater than 2- mu m-width did not operate as Josephson devices. The characteristics of these SQUIDs suggested vortex flow. Periodic modulation of the voltage with magnetic flux was observed in a SQUID having submicrometer microbridges. Telegraph-like noise of the voltage which exhibits switching between two or more discrete levels was observed in all of the SQUIDs irrespective of the width of the microbridges. This noise was also observed in a single microbridge, and its effective switching rate increased exponentially with the increase of temperature above 15 K.<>
Sponsorship	IEEE Magnetics Society
Starting Page	1301
Ending Page	1304
Page Count	4
File Size	376836
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	Temperature SQUIDs Superconducting films Sputtering Superconducting devices Voltage Magnetic noise Superconducting device noise Superconducting thin films Radio frequency
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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