OBSERVATION OF GIANT FLUX-FLOW IN SUPERCONDUCTING YBA2CU3O7-DELTA FILMS

被引：3
作者：
BLACKSTEAD, HA [1 ]
PULLING, DB [1 ]
HORWITZ, JS [1 ]
CHRISEY, DB [1 ]
机构：
[1] NAVAL RES LAB, WASHINGTON, DC 20375 USA
来源：
SOLID STATE COMMUNICATIONS | 1993年 / 88卷 / 09期
关键词：
D O I：
10.1016/0038-1098(93)90622-T
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Measurements of field-induced changes the a-b plane surface resistance of high quality (> 10(6) A/cm(2) at 77K and H=0) YBa2Cu3O7-delta films at 12.92 GHz reveal enormous flux-flow resistivity at temperatures several degrees below the superconducting onset temperature. Flux-flow resistivity is identified by its dependence on the Lorentz force. The results suggest that large scale effective pinning is not responsible for the high critical current density observed in these films; a reduction in structural defects and improved oxygen vacancy ordering may be of greater importance.
引用
收藏
页码：671 / 675
页数：5
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