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

被引：36

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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