THE CRITICAL CURRENT OF AG/YBA2CU3O7-DELTA RANDOM BULK COMPOSITES

被引：15
作者：
CALABRESE, JJ [1 ]
DUBSON, MA [1 ]
GARLAND, JC [1 ]
机构：
[1] OHIO STATE UNIV, DEPT PHYS, COLUMBUS, OH 43210 USA
来源：
JOURNAL OF APPLIED PHYSICS | 1992年 / 72卷 / 07期
关键词：
D O I：
10.1063/1.351500
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have measured the current-voltage characteristics of bulk percolating Ag/YBa2Cu3O7-delta composites ranging in composition from 0.10 to 1.00 volume fraction superconductor at temperatures from 40 to 100 K. The dependence of the normal state resistivity on volume fraction is consistent with the percolation theory. The critical current densities of the composites exhibit a temperature dependence consistent with superconductor-normal metal-superconductor junction behavior. Our data suggest that the critical currents in these composites are limited by proximity coupling through Ag between the high-T(c) grains.
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页码：2958 / 2963
页数：6
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