ANOMALOUS MAGNETIC-FIELD DEPENDENCE OF THE TRANSPORT CRITICAL CURRENT-DENSITY OF HIGH-TC SUPERCONDUCTING CERAMICS

被引：2
|
作者：
MIU, L
机构：
[1] Inst. of Phys. and Technol. of Mater., Bucharest
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1992年 / 5卷
关键词：
D O I：
10.1088/0953-2048/5/1S/045
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The minimum observed in the magnetic field dependence of the transport critical current density of high-T(c) superconducting ceramics at relatively low applied field values was analysed. This anomalous behaviour results from the influence of pinning assisted demagnetisation effects at low fields and an increase of the intergranular pinning force at higher fields, through vortex-vortex interactions. The low voltage level I-V characteristics of the investigated samples can be described in terms of thermally activated flux creep at grain boundaries.
引用
收藏
页码：S208 / S211
页数：4
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