THERMALLY ACTIVATED FLUX MOTION IN YBACUO THIN-FILMS - EXPERIMENTAL-EVIDENCE FOR THE TEMPERATURE-CURRENT SEPARABILITY OF THE ACTIVATION-ENERGY

被引：14
作者：
XIAO, ZL
HARING, J
HEINZEL, C
ZIEMANN, P
机构：
[1] Fakultät für Physik, Universität Konstanz
来源：
SOLID STATE COMMUNICATIONS | 1995年 / 95卷 / 03期
关键词：
HIGH-T-C SUPERCONDUCTORS; THIN FILMS; FLUX PINNING AND CREEP;
D O I：
10.1016/0038-1098(95)00250-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
On the basis of electric field-current density (E-j) isotherms experimentally determined on YBaCuO thin film microbridges, the previously assumed separation ansatz U(T, B-e,j) = g(T, B-e)U-j(j) for the activation energy for flux motion is tested over a wide range of current densities. Although the E-j data span approximately six decades in E and can be scaled according to the vortex glass theory, they do not allow an unambiguous proof of this model. This is demonstrated by showing that the data can be fitted to a model of thermally activated flux motion. An estimate is given for the necessary experimental resolution to distinguish between both models.
引用
收藏
页码：153 / 157
页数：5
相关论文
共 27 条
123