CURRENT-VOLTAGE CHARACTERISTICS OF A BI2SR2CA2CU3O8+DELTA CERAMIC SUPERCONDUCTOR

被引：7

作者：

KOMARKOV, DA

ZHUKOV, AA

MIRKOVIC, J

机构：

[1] Laboratory of High-Tc Superconductivity, Physics Department, Moscow State University, Moscow

来源：

SOLID STATE COMMUNICATIONS | 1994年 / 89卷 / 09期

关键词：

D O I：

10.1016/0038-1098(94)90726-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A special contactless technique in combination with the four-probe method allowed current-voltage characteristics in a very wide range of electric fields E approximately 10(-13) divided-by 10(-1) V/cm to be measured on a ring-shaped specimen of the Bi2Sr2Ca2Cu3O8+delta ceramics at T=77K and different magnetic fields. Experimental data are characterized with an S-like behavior that corresponds qualitatively to the characteristic of a single Josephson junction in the presence of thermal fluctuations. At low magnetic fields, a scaling behavior of magnetic field dependences of critical currents determined by different voltage levels has been revealed which fails on exceeding an intragrain lower critical field.

引用

页码：751 / 754

页数：4

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