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.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
