高Tc超导GdBa_2Cu_3O_7薄膜弱连接双晶结研究  

Investigation on High Tc Superconducting GdBa2Cu3O7-5Thin Film Week Link Bicrystal Junction

作　　者：万云[1,2] 于明湘[1,2] 贺庆丽[1,2] 姚合宝 张湘云[1,2] 

机构地区：[1]西北大学物理系 [2]山东大学电子系

出　　处：《激光与红外》1998年第3期173-175,185,共4页Laser & Infrared

摘　　要：为了获得具有约瑟夫逊效应的超导弱连接结，我们在ＹＳＺ（钇稳定的氧化锆）双晶基片上，制备了高ＴｃＧｄＢａ２Ｃｕ３Ｏ７超导薄膜，晶界夹角为２４°和３２°两种，采用光刻技术的晶界上刻出不同尺寸的微桥，晶界贯穿桥区而形成双晶结，观测了结的直流１－Ｖ特性和在１０ＧＨｚ微波辐照下临界电流的压缩和Ｓｈａｐｉｒｏ台阶，实验结果证明双晶结具有约瑟夫逊弱连接行为，在实验基础上，对结的特性进行了理论分析，并将双晶结用于光探测获得成功。ln order to obtain the superconducting weak link junction that has Josephson effect , The high Tc Superconducting GdBa2Cu3O thin film bicrystal junction have been fabricated on YSZ bicrystal substrates , the misorientation angle of bicrystal boundary are 24° and 32° respectivily. The samples were patterned using general photolith- graphy technique. The cryseal boundary pass through the centre of junction. The DC I - V charac- teristic and it under microwave irradiction of bicrys- tal junction were measured. The Josephson weak link characteristics were shown by experimental resultes of our bicrystal junction. On the base of experimen- tal the theoretical analysis were performed.

关 键 词：超导薄膜 双晶结 SNS结构 

分 类 号：TM26[一般工业技术—材料科学与工程] O484.1[电气工程—电工理论与新技术]