Intergranular and intragranular currents in (Bi,Pb)2Sr2Ca2Cu3O10+x superconductors:: temperature dependence in low magnetic fields

被引：4
|
作者：
Paasi, J
Kottman, P
Majoros, M
Plechacek, V
机构：
[1] Tampere Univ Technol, Lab Elect & Magnetism, FIN-33101 Tampere, Finland
[2] Slovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, Slovakia
[3] Acad Sci Czech Republ, Inst Phys, CR-16200 Prague, Czech Republic
来源：
PHYSICA C | 1998年 / 305卷 / 1-2期
基金：
芬兰科学院;
关键词：
granular superconductivity; critical current density; magnetization;
D O I：
10.1016/S0921-4534(98)00321-9
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The temperature dependence of intergranular and intragranular currents in (Bi,Pb)(2)Sr2Ca2Cu3O10+x superconductors was studied in low magnetic fields. Zn order to distinguish the two kinds of currents, the experiments were performed with two samples of similar grains: a hulk sample of well-coupled grains, and a sample without intergranular coupling (powder sample). The temperature dependence of intragranular currents exhibited a behaviour typical for S-N-S (superconductor-normal metal-superconductor) junctions. For intergranular currents the temperature dependence suggested a limitation due to thermally activated flux creep in the space between the superconducting grains. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：21 / 25
页数：5
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