Liu Xin-Yuan (刘新元)ab, Xie Fei-Xiang (谢飞翔)a, Meng Shu-Chao (孟树超)a, Dai Yuan-Dong (戴远东)a, Li Zhuang-Zhi (李壮志)a, Ma Ping (马平)a, Yang Tao (杨涛)a, Nie Rui-Juan (聂瑞娟)a, Wang Fu-Ren (王福仁)a
a State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, and Department of Physics, Peking University, Beijing 100871, China; b School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
Abstract A new high-Tc (HTc) rf SQUID working at around 1.3GHz has been developed to avoid electromagnetic interference such as growing mobile communication jamming. This new system works in a frequency range from 1.23 to 1.42GHz (centred at 1.3GHz), which is not occupied by commercial communication. The sensor used in the 1.3GHz rf SQUID is made of a HTc coplanar superconducting resonator and a large-area HTc superconducting film concentrator. We have achieved in the 1.3GHz HTc rf SQUID system a minimal flux noise of $2.5×10^{-5}\varPhi_0/\sqrt{\rm Hz}$ and a magnetic field sensitivity of 38fT/$\sqrt{\rm Hz}$ in white noise range, respectively. The effective area of the concentrator fabricated on a 15×15mm2 substrate is 1.35mm2. It is shown that the 1.3GHz rf SQUID system has a high field sensitivity. Design and implementation of 1.3GHz HTc rf SQUID offers a promising direction of rf SQUID development for higher working frequency ranges.
Received: 18 July 2003
Revised: 03 September 2003
Accepted manuscript online:
(Superconducting device characterization, design, and modeling)
Fund: Project supported by the State Key Program of Basic Research of China (Grant No G1999064609), and the National High Technology Development Program of China (Grant No 2002AA306412).
Cite this article:
Liu Xin-Yuan (刘新元), Xie Fei-Xiang (谢飞翔), Meng Shu-Chao (孟树超), Dai Yuan-Dong (戴远东), Li Zhuang-Zhi (李壮志), Ma Ping (马平), Yang Tao (杨涛), Nie Rui-Juan (聂瑞娟), Wang Fu-Ren (王福仁), Development of 1.3GHz high-T-c rf SQUID 2004 Chinese Physics 13 100
Frequency-tunable transmon in a three-dimensional copper cavity Pan Jia-Zheng (潘佳政), Cao Zhi-Min (曹志敏), Fan Yun-Yi (范云益), Zhou Yu (周渝), Lan Dong (兰栋), Liu Yu-Hao (刘宇浩), Chen Zhi-Ping (陈志平), Li Yong-Chao (李永超), Cao Chun-Hai (曹春海), Xu Wei-Wei (许伟伟), Kang Lin (康琳), Chen Jian (陈健), Yu Hai-Feng (于海峰), Yu Yang (于扬), Sun Guo-Zhu (孙国柱), Wu Pei-Heng (吴培亨). Chin. Phys. B, 2015, 24(11): 110301.
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