High-T/sub c/ SQUIDS with local oxygen-ion irradiated weak links

Author

Tinchev, S.S.

Author_Institution

Forschungsgesellschaft fuer Informationstech., Bad Salzdetfurth, Germany

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

28

Lastpage

32

Abstract

High-T/sub c/ S-N-S RF superconducting quantum interference devices (SQUIDs) were successfully made from single-layer high-quality epitaxial YBCO films. These SQUIDS operate at liquid nitrogen temperature using local oxygen-ion irradiated microbridges. Device yields of about 70% have been obtained with preamplifier limited noise properties. Microbridges of this type can be used as active devices also for other electronic applications because only standard integrated circuit techniques are needed. The magnetic field sensitivity of the 1.4-mm*1.4-mm SQUID is 2 pT Hz/sup -1/2/ at 10 Hz. A parallel connected 8-mm*8-mm pick-up loop improves the sensitivity of 0.7 pT Hz/sup -1/2/.<>

Keywords

SQUIDs; barium compounds; high-temperature superconductors; magnetic field measurement; yttrium compounds; 10 Hz; RF superconducting quantum interference devices; SQUIDs; YBa/sub 2/Cu/sub 3/O/sub 7- delta /; active devices; device yields; electronic applications; high temperature superconductors; local O irradiated weak links; magnetic field sensitivity; microbridges; pick-up loop; preamplifier limited noise properties; sensitivity; single-layer; Magnetic films; Nitrogen; Radio frequency; Radiofrequency interference; SQUIDs; Superconducting device noise; Superconducting devices; Superconducting epitaxial layers; Superconducting films; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233411

Filename

233411