Open AccessYBCO STEP-EDGE JUNCTION DC-SQUID PLANAR GRADIOMETER
Author(s) -
Bing Han,
Chen Geng-Hua,
Xu Feng-Zhi,
S. P. Zhao,
Yang Qian-Sheng
Publication year - 2000
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.49.2051
Subject(s) - gradiometer , squid , josephson effect , pickup , planar , physics , enhanced data rates for gsm evolution , optics , noise (video) , materials science , sensitivity (control systems) , substrate (aquarium) , optoelectronics , nuclear magnetic resonance , superconductivity , magnetometer , magnetic field , condensed matter physics , telecommunications , electronic engineering , ecology , computer graphics (images) , quantum mechanics , artificial intelligence , computer science , image (mathematics) , biology , oceanography , geology , engineering
A dc-SQUID planar gradiometer has been fabricated with YBa2Cu3O7-δ step-edge Josephson junctions on a 10mm×10mm single crysta l SrTiO3 100 substrate. The gradiometer has a pair of pickup loop s with an area of 33 mm2 and the baseline of 45mm. The system opera tes well in unshielded environment. A rejection of common mode fields of 14×1 02 in all directions and a field gradient sensitivity (white noise) b etter than 8pT/cmHz at 77K have been achieved.