Selection of the best proper DC-SQUIDs in a Multi-SQUID configuration
Makaleler > Tam Makale · 2007
Yazarlar: İlbeyi AVCI, R AKRAM, A BOZBEY, Mustafa TEPE, D ABUKAY
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2007, cilt 17, ss 680-682
Özet
We have carried out experimental investigation of multi-DC-SQUID magnetometer configuration fabricated on YBa2Cu3O7-delta thin films onto 24 degree SrTiO3 bicrystal substrates by directly coupling the pick-up loop to DC-SQUIDs. The layout of the magnetometer pick-up loop was chosen as a square washer configuration by maximizing. loop effective area and minimizing loop inductance. We have used Dc-Magnetron Sputtering technique for deposition of the films and chemical etching process for patterning the Josephson junctions having 4 mu m widths. The use of multi-SQUID configuration is related to the selection of the best proper junctions for SQUID to improve the chip sensitivity with selectivity option of choosing the squid junctions rather than multichannel operation. Selection of the best junctions compared to each other depending on the junction critical currents and noise levels caused by the fabrication process and placements of the junctions on the grain boundary enable having an increased output signal of the DC-SQUID.