Development of 1.3GHz high-T-c rf SQUID

doi:10.1088/1009-1963/13/1/019

中国物理B ›› 2004, Vol. 13 ›› Issue (1): 100-104.doi: 10.1088/1009-1963/13/1/019

Development of 1.3GHz high-T-c rf SQUID

谢飞翔¹, 孟树超¹, 戴远东¹, 李壮志¹, 马平¹, 杨涛¹, 聂瑞娟¹, 王福仁¹, 刘新元²

(1)State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, and Department of Physics, Peking University, Beijing 100871, China; (2)State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, and Department of Physics, Peking University, Beijing 100871, China; School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China

收稿日期:2003-07-18 修回日期:2003-09-03 出版日期:2001-01-15 发布日期:2007-03-22
基金资助:
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).

Development of 1.3GHz high-T-c rf SQUID

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

Received:2003-07-18 Revised:2003-09-03 Online:2001-01-15 Published:2007-03-22
Supported by:
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).

摘要/Abstract

摘要： A new high-T_c (HT_c) 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 HT_c coplanar superconducting resonator and a large-area HT_c superconducting film concentrator. We have achieved in the 1.3GHz HT_c rf SQUID system a minimal flux noise of 2.5×10^{-5}Φ_0/\sqrt{Hz} and a magnetic field sensitivity of 38fT/\sqrt{Hz} in white noise range, respectively. The effective area of the concentrator fabricated on a 15×15mm^2 substrate is 1.35mm^2. It is shown that the 1.3GHz rf SQUID system has a high field sensitivity. Design and implementation of 1.3GHz HT_c rf SQUID offers a promising direction of rf SQUID development for higher working frequency ranges.

Abstract: A new high-T_c (HT_c) 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 HT_c coplanar superconducting resonator and a large-area HT_c superconducting film concentrator. We have achieved in the 1.3GHz HT_c 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 HT_c rf SQUID offers a promising direction of rf SQUID development for higher working frequency ranges.

Key words: 1.3GHz HT_c rf SQUID, new structure sensor, large effective

中图分类号: (Superconducting quantum interference devices (SQUIDs))

85.25.Dq

85.25.Am (Superconducting device characterization, design, and modeling)

刘新元, 谢飞翔, 孟树超, 戴远东, 李壮志, 马平, 杨涛, 聂瑞娟, 王福仁. Development of 1.3GHz high-T-c rf SQUID[J]. 中国物理B, 2004, 13(1): 100-104.

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[J]. Chinese Physics, 2004, 13(1): 100-104.

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Development of 1.3GHz high-T-c rf SQUID

Development of 1.3GHz high-T-c rf SQUID

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