Correlation between the normal state resistivity and the critical current density of Ag sheathed Bi(2223) tapes

被引：23

作者：

Grasso, G ^{[1
]}

Marti, F ^{[1
]}

Huang, Y ^{[1
]}

Perin, A ^{[1
]}

Flukiger, R ^{[1
]}

机构：

[1] UNIV GENEVA,APPL PHYS GRP,CH-1211 GENEVA 4,SWITZERLAND

来源：

PHYSICA C | 1997年 / 281卷 / 04期

关键词：

applications of high T-c superconductors; critical current density; normal state properties;

D O I：

10.1016/S0921-4534(97)01472-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The normal state resistivities of Ag/Bi(2223) tapes with various critical current densities between 7 and 34 kA/cm(2) at 77 K were measured after chemical etching of the silver sheath surrounding the superconducting filament. A strong correlation between the critical current density and the normal state resistivity was observed, their product J(c) x rho being constant, regardless of the sample quality. This observation is in quantitative agreement with the railway-switch and the parallel pipe models which have been proposed for the explanation of the current transport mechanism in Bi(2223) tapes. Moreover, an extrapolated critical current density value exceeding 1.3 x 10(5) A/cm(2) at 77 K has been deduced for a hypothetical Bi(2223) tape in which all the grains are connected by railway switches. (C) 1997 Elsevier Science B.V.

引用

页码：271 / 277

页数：7

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