Vortex pinning due to strong quasiparticle scattering at antiphase boundaries in YBa2Cu3O7-δ

被引：54

作者：

Jooss, C

Warthmann, R

Kronmüller, H

Haage, T

Habermeier, HU

Zegenhagen, J

机构：

[1] Max Planck Inst Met Forsch, D-70569 Stuttgart, Germany

[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.82.632

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a recently developed quantitative magneto-optical method we investigated the vortex pinning mechanism in YBa2Cu3O7-delta films. Parallel oriented planar antiphase boundaries (APB's), generated in epitaxial thin films grown on vicinal SrTiO3 (001), serve as well defined pinning sites, yielding extraordinary high pinning forces and an anisotropic critical current density j(c) up to approximate to 30% of the depairing current. The measured angular and temperature dependence as well as the magnitude of j(c) prove that pinning at APB's is dominated by quasiparticle scattering induced variation of condensation energy, characteristic of superconductors with anisotropic order parameter. [S0031-9007(98)08137-X].

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页码：632 / 635

页数：4

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