Anisotropic temperature-dependent current densities in vicinal YBa2Cu3O7-δ -: art. no. 220507

被引：34
|
作者：
Djupmyr, M
Cristiani, G
Habermeier, HU
Albrecht, J
机构：
[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.72.220507
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thin epitaxial films of YBa2Cu3O7-delta grown on vicinal cut substrates exhibit a substantial anisotropy of the critical current density j(c) in the film plane. By means of a quantitative magneto-optical analysis it is possible to investigate the current densities along different directions independently from each other. We performed a detailed analysis of the temperature dependence of the critical currents in the range T=5-90 K and found a completely different behavior of j(c)(T) along different directions. Describing the data by a step-wise power-law ansatz allows us to distinguish between different current limiting mechanisms.
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页数：4
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