Transport properties and flux pinning by self-organization in YBa2Cu3O7-delta films on vicinal SrTiO3(001)

被引：140

作者：

Haage, T ^{[1
]}

Zegenhagen, J ^{[1
]}

Li, JQ ^{[1
]}

Habermeier, HU ^{[1
]}

Cardona, M ^{[1
]}

Jooss, C ^{[1
]}

Warthmann, R ^{[1
]}

Forkl, A ^{[1
]}

Kronmuller, H ^{[1
]}

机构：

[1] MAX PLANCK INST MET RES,D-70569 STUTTGART,GERMANY

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.56.8404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have observed anisotropic flux pinning and resistivity in the substrate plane of YBa2Cu3O7-delta (YBCO) thin films grown on vicinal SrTiO3(001) with the c axis oriented along the SrTiO3[001] direction. Using UHV scanning tunneling microscopy and transmission electron microscopy we demonstrate the influence of a periodic nanoscale step structure of the clean substrate surface on the morphology and defect microstructure of subsequently deposited YBCO films. A linear array of dislocations generated via self-organization of the YBCO leads to an exceptionally large critical current density up to 8 X 10(11)A/m(2) at 4.2 K. The findings indicate that the critical current density of high-temperature superconductors can be enhanced in a controlled way growing thin films on tailored substrate surfaces.

引用

页码：8404 / 8418

页数：15

共 41 条

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