高温超导薄膜晶界的电传输特性  

GRAIN-BOUNDARIES AND ELECTRO-TRANSPORT CHARACTERISTICS OF HIGH-T_c SUPERCONDUCTING THIN FILMS

作　　者：蔡传兵[1] 刘志勇[1] 彭麟[1] 高波[1] 刘金磊[1] 应利良[1] 

机构地区：[1]上海大学物理系,上海200444

出　　处：《低温物理学报》2007年第4期247-258,共12页Low Temperature Physical Letters

基　　金：上海市重点学科建设基金(项目编号:T0104);上海市浦江人才计划(项目编号:5PJ14048);上海市重点科技攻关基金(项目编号:055211003);国家自然科学基金(项目编号:50672057);国家教委留学回国人员科研启动基金等资助的课题~~

摘　　要：本文较系统地总结和分析了氧化物高温超导薄膜晶界的电流电压、薄膜晶界及其二维网络中的临界电流密度等电传输特性,讨论了薄膜晶界电流密度对磁场的依赖关系和各向异性特征,介绍了薄膜晶界电传输特性的光电辐射效应、化学掺杂效应和电场效应.这些针对超导薄膜晶界电传输特性的研究不仅对高温超导弱连接和电子配对机制的理解,而且对基于双轴织构和薄膜外延技术的第二代高温超导带材的发展具有重要意义.In the present paper, the issues related to Grain-boundary （GB） are summarized and discussed with respect to the voltage-current behaviours, critical current densities of single GB and two-dimensional GB networks, as well as their dependence on the radiation, doping and electric fields. It should be very interesting to study GB and the related magneto-transport properties for high-Tc superconducting thin films, because of their significance not only for basic understanding to weak links and electron pairing mechanisms, but also for the technological development of coated conductors which emerged with biaxially textured thin films.

关 键 词：高温超导 薄膜晶界 电流电压 临界电流密度 

分 类 号：O511.3[一般工业技术—材料科学与工程] O484[理学—低温物理]