VORTEX PINNING AND TWIN BOUNDARIES IN YBA2CU3O7-DELTA THIN-FILMS

被引：37
作者：
LAIRSON, BM
STREIFFER, SK
BRAVMAN, JC
机构：
[1] Department of Materials Science and Engineering, Stanford University, Stanford
来源：
PHYSICAL REVIEW B | 1990年 / 42卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.42.10067
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The interaction between magnetic flux vortices and twin boundaries is investigated in YBa2Cu3O7 thin films. Films grown to various thicknesses, and cooled along different paths in the YBa2Cu3O7- phase diagram, are shown to have various twin boundary microstructures and densities. It is demonstrated that changes in processing result in differences in the vortex-pinning behavior of the films, but that these differences are not due to changes in the microstructure of the twin boundaries. Further, observed differences in the twin spacing do not result in changes in the volume pinning force. This is found to be true in the magnetic-field regime spanning the range from where the flux vortex spacing is large relative to the twin density to where the vortex spacing is small relative to this density. © 1990 The American Physical Society.
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收藏
页码：10067 / 10074
页数：8
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