YBa_2Cu_3O_(7-δ)薄膜热激发磁通蠕动研究  

A STUDY ON MAGNETIC THERMALLY FLUX CREEP OF YBa2Cu_3A_(?) THIN FILM

作　　者：张贻瞳 金新[1] 张长贵[1] 金继荣 姚希贤[1] 吉争鸣[2] 孙志坚[2] 杨森祖[2] 

机构地区：[1]南京大学物理系,南京210008 [2]南京大学信息物理系,南京210008

出　　处：《物理学报》1991年第7期1174-1178,共5页Acta Physica Sinica

基　　金：国家超导技术联合研究开发中心基金

摘　　要：本文选择两块零电阻温度分别为82K和71K超导性能不同的薄膜样品,同步进行了电阻在外磁场中展宽的测量,并用Palstra所提出的Arrhenius定律研究两样品热激活能的差别。实验发现样品热激活能随磁场增加线性下降。由测量结果推出的不可逆线仍有B-(1-T/T_c)^(3/2)形式。Two high Tc superconductor YBa2Cu3O7-d thin films, the zero resistance temperature of which were 82K and 71K respectively, were selected for measurement about resistance broadening. The difference in thermal activation energy of the two samples was analyzed with Arrhenius law auggested by Palstra We found that the activation energy decreased depending upon increasing magnetic field. The irreversibi-lity line was B*-(1-T*/Tc)3/2 deduced from our data.

关 键 词：YBACUO 薄膜 磁通蠕动 热激活能 

分 类 号：TM262[一般工业技术—材料科学与工程]