YBa_(2)Cu_(3)O_(7) Bicrystal Josephson Junctions and de SQUIDs  

作　　者：Yu.V.Kislinskii ZHAO Bai-ru WU Pei-jun PENG Zhi-qiang CHEN Ying-fei YANG Tao CHEN Lie SUN Ji-jun XU Bo WU Fei ZHOU Yue-liang LI Lin ZHAO Zhong-xian E.A.Stepantsov 

机构地区：[1]institute of physics,Chinese Academy of Sciences,Beijing 100080 [2]Permanent address-histitute of Crystallography,117333,Moscow,Russia [3]Institute of Crystallography,117333,Moscow,Russia

出　　处：《Chinese Physics Letters》1996年第5期390-393,共4页中国物理快报（英文版）

基　　金：Supported by the National Research and Development Cent er for Superconductivity.

摘　　要：Bicvystal Josephson junctions and direct current superconducting quantum inter ference devices(dc sQUIDs)were prepared on YBa_(2)Cu_(3)O_(7)(YBCO)thin films deposited on yttrium stabilized ZrO_(2) bicrystal substrates.The critical current densities J_(c)~2×10^(6)/cm^(2) for YBCO thin filmand(1-3)×10^(3)A/cm^(2) at boundaries were obtained at 77 K.For YBCO Josephson junctionmade on 28° misorientated boundary,the Shapiro steps were observed.The dc SQUID was madeon the 32° misorientated boundary junctions,which consisted of 40×40 m of loop and 2000×2000 pn planar superconductive flu.r focuser.The zoltage modulation depth of this SQUID was6 p.V,and the magnetic field sensitivity was estimated to be~2 pT/√Hz from the measurednoise level.

关 键 词：SQUID JOSEPHSON YBCO 

分 类 号：O51[理学—低温物理]