Title :
High-T/sub c/ SQUIDS with local oxygen-ion irradiated weak links
Author_Institution :
Forschungsgesellschaft fuer Informationstech., Bad Salzdetfurth, Germany
fDate :
3/1/1993 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
