Scaling of percolative current flow to long lengths in biaxially textured conductors

被引：39

作者：

Specht, ED ^{[1
]}

Goyal, A ^{[1
]}

Kroeger, DM ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2000年 / 13卷 / 05期

关键词：

D O I：

10.1088/0953-2048/13/5/331

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A random mixture of conducting and non-conducting sites or bonds on a two-dimensional lattice is used to model textured polycrystalline superconducting conductors in which high currents are carried only by low-angle grain boundaries. We calculate the frequency with which unfavourable configurations will significantly decrease current flow. For realistic distributions, in very narrow conductors (similar to 10 grains wide) critical current is reduced, sometimes to zero, over long lengths. For a typical conductor, 1 cm wide with 50 mu m grain size, fluctuations in critical current of less than 10% are expected for kilometre lengths.

引用

页码：592 / 597

页数：6

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