Open AccessLarge effective area highTc rf SQUID
Author(s) -
Xinyuan Liu,
Xie Fei-Xiang,
Meng Shu-Chao,
Ping Ma,
Tao Yang,
Ruijuan Nie,
Shouzheng Wang,
Furen Wang,
Yuchao Dai
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.2580
Subject(s) - squid , sensitivity (control systems) , materials science , resonator , magnetometer , flux (metallurgy) , concentrator , superconductivity , noise (video) , optoelectronics , radio frequency , scanning squid microscopy , magnetic flux , nuclear magnetic resonance , magnetic field , physics , optics , electrical engineering , condensed matter physics , electronic engineering , computer science , biology , ecology , gradiometer , quantum mechanics , artificial intelligence , engineering , metallurgy , image (mathematics)
We have designed and fabricated a new type of highTc rf SQUID sensor. A high T c coplanar superconducting resonator and a large area high Tc superconductin g film concentrator have been used simultaneously. With a large effective area and low white flux noise, we have achieved a flux noise of 2.1×10-5 0 /Hz and a magnetic field sensitivity of 34fT/Hz in white noise range, respective ly, using an effective area of 1.27 mm2 concentrator on a 15 mm×15 m m substra te. This design can be easily applied to higher frequency high Tc rf SQUID system.