%0 Journal Article
%T Development of 1.3GHz high-T-c rf SQUID<br>Development of 1.3GHz high-Tc rf SQUID
%A Liu Xin-Yuan
%A Xie Fei-Xiang
%A Meng Shu-Chao
%A Dai Yuan-Dong
%A Li Zhuang-Zhi
%A Ma Ping
%A Yang Tao
%A Nie Rui-Juan
%A Wang Fu-Ren
%A <br>刘新元
%A 谢飞翔
%A 孟树超
%A 戴远东
%A 李壮志
%A 马平
%A 杨涛
%A 聂瑞娟
%A 王福仁
%J 中国物理 B
%D 2004
%I 
%X 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.
%K 1
%K 3GHz HT_c rf SQUID
%K new structure sensor
%K large effective<br>临界温度
%K SQUID
%K 超导量子干涉器件
%K 结构传感器
%K 电磁干涉
%K 超导谐振器
%K 白噪声
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=412A2DFFBE6595D1FB6CC6FBB60F15AF&yid=D0E58B75BFD8E51C&vid=FC0714F8D2EB605D&iid=CA4FD0336C81A37A&sid=8C83C265AD318E34&eid=DBF54A8E2A721A6D&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=9