CdBa_2Cu_3O_(7-x)薄膜的涨落电导  

FLUCTUATION CONDUCTIVITY OF GdBa_2Cu_3O(7-x) FILM

作　　者：种燕 王楠林[1] 邓明[1] 阮可青[1] 周为[1] 汪成友[1] 曹烈兆[1] 李宏成[2] 王瑞兰[2] 

机构地区：[1]中国科学技术大学物理系,合肥230026 [2]中国科学院物理研究所国家超导实验室,北京100080

出　　处：《物理学报》1995年第5期772-778,共7页Acta Physica Sinica

摘　　要：测量了高质量的GdBa_2Cu_3O_(7-x)薄膜的电阻及磁阻曲线,应用Lawrence-Doniach理论对实验曲线进行了拟合,得到了一组自洽且合理的参数值,由ln(σ—σ_(?))-Int曲线可以明显地看到存在一个二维向三维的转变。The fluctuation conductivity and magnetoresistance of a high quality GdBa2Cu3- O7-x c-axis-oriented epitaxial film have been investigated. The measured excess con-ductivity in the temperature range 96-280K is fitted by the Lawrence Doniach the-ory. By using this theory, reasonable values of parametes α,b,?ξc,Tc,d are obtained and a 2D-to-3D transition is observed according to the ln(σ-σx)-lnt curve.

关 键 词：GBCO 超导体 薄膜 电子 电阻 磁阻 

分 类 号：TM263[一般工业技术—材料科学与工程] O511.2[电气工程—电工理论与新技术]