CRITICAL-BEHAVIOR OF THE RESISTANCE NOISE IN GRANULAR SUPERCONDUCTORS

被引：2

作者：

APONTE, JM ^{[1
]}

BELLORIN, A ^{[1
]}

OENTRICH, R ^{[1
]}

GUTIERREZ, G ^{[1
]}

OCTAVIO, M ^{[1
]}

机构：

[1] UNIV SIMON BOLIVAR,DEPT FIS,CARACAS 1080A,VENEZUELA

来源：

PHYSICA C | 1991年 / 185卷 / pt 4期

关键词：

D O I：

10.1016/0921-4534(91)91214-O

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present new experimental evidence of the percolative nature of the resistive transition of granular superconductors by showing that the spectral density S(v)/V2 of the resistance noise diverges as the zero resistance state is approached. The measurements were performed by approaching the critical current at fixed temperatures and in the frequency range from 0.1 Hz to 100 Hz. This result is consistent with percolation models of normal-superconductor composites. In order to interpret our results we have defined a new exponent x such that (I-I(c)) is-proportional-to (p(c)-p)x. Values obtained for x are presented.

引用

页码：2179 / 2180

页数：2

共 6 条

[1] TEMPERATURE-DEPENDENCE OF THE CRITICAL CURRENT IN HIGH-TC SUPERCONDUCTORS [J].