氧气中退火对Ag与YBa_2Cu_3O_(7-δ)超导薄膜相互作用的影响  

STUDY ON THE INTERACTIONBETWEEN Ag AND YBa_2Cu_3O_(7-δ)THIN FILMS ANNEALED IN OXYGEN

作　　者：李天博[1] 赵永刚[1] 朱美红[1] 刘涛[1] 张留碗[1] 黄贺生[1] 刘梦林[1] 周岳亮[2] 何萌[2] 吕慧宾[2] 曹必松[1] 

机构地区：[1]清华大学物理系,北京100084 [2]中国科学院物理研究所光物理实验室,北京100080

出　　处：《低温物理学报》2001年第3期206-210,共5页Low Temperature Physical Letters

摘　　要：本文通过多种实验手段对Ag/YBCO薄膜退火后Ag膜与YBCO薄膜的相互作用进行了研究 .Ag/YBCO在退火过程中 ,存在着Ag沿YBCO的表面的横向扩散和向YBCO薄膜内部的纵向扩散 ,Ag的纵向扩散有一定深度 .Ag与YBCO很可能发生物理而非化学作用 ,渗透进入YBCO的Ag可能在YBCO的晶界处形核生长 ,使YBCO晶格发生畸变 ,产生应力 ,从而导致接触电阻值的增大 .Several techniques were used to study interaction between silver films and YBa-2Cu-3O-{7-δ} films, due to annealing at high temperatures in oxygen. The results show that silver diffuses into the YBCO film and the interaction between them is some kind of physical interaction. It is proposed that silver is likely to enter the grain boundaries of YBCO film, then nucleates and grows up. This kind of effect leads to the increase of the internal stress in the YBCO lattice and cause some distortion of the YBCO lattice, resulting in the dramatic increase of the contact resistivity.

关 键 词：氧气 退火 银 YBCO 超导薄膜 相互作用 

分 类 号：O484[理学—固体物理]