Effect of an external magnetic field and a trapped magnetic flux on the current-voltage characteristics of a granular high-temperature superconductor YBa2Cu3O7-δ

被引：26
作者：
Derevyanko, V. V. [1 ]
Sukhareva, T. V. [1 ]
Finkel', V. A. [1 ]
机构：
[1] Natl Acad Sci Ukraine, Kharkov Inst Phys & Technol, Natl Sci Ctr, UA-61108 Kharkov, Ukraine
来源：
PHYSICS OF THE SOLID STATE | 2006年 / 48卷 / 08期
关键词：
74; 72; Bk; 25; Fy; Ha;
D O I：
10.1134/S1063783406080051
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A comparative study of the current-voltage characteristics of the high-temperature ceramic superconductor YBa2Cu3O-6.95 at T = 77.3 K is performed over wide ranges of external magnetic fields H-ext and "treatment" fields H-treat. It is found that the field dependences of the parameters a and j(c) involved in the exponential equation E = a(j - j (c))(v) describing the current-voltage characteristics depend substantially on the method used for applying the magnetic field, whereas the exponent v similar to 2 depends on neither the method of application nor on the magnetic field strength. The field dependence of the trapped magnetic field H-trap is determined.
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收藏
页码：1455 / 1460
页数：6
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