TEMPERATURE AND MAGNETIC-FIELD DEPENDENCE OF CRITICAL CURRENTS IN GRANULAR SUPERCONDUCTORS

被引：2

作者：

COSTABILE, G

DELUCA, R

PACE, S

SAGGESE, A

TESTA, AM

机构：

[1] Department of Physics, University of Salerno

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.402825

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We analyze the critical current density J(c) of a two-dimensional granular superconductor by a Josephson junction network approach, taking into account shielding current effects. We show that the temperature and field dependence of J(c) is not directly given by the corresponding dependences of the maximum Josephson current of a single junction. By a critical state picture we discuss the temperature and magnetic field dependence of the effective energy barrier U-gamma for flux motion in the array. From the knowledge of U-gamma, calculated in the presence of currents flowing through the Junctions, the magnetic field and temperature dependence of the critical current is derived.

引用

页码：1395 / 1398

页数：4

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