Resistor network model for simulation of current and flux percolation in granular coated conductors

被引：16

作者：

Zeimetz, B

Glowacki, BA

Evetts, JE

机构：

[1] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England

[2] Univ Cambridge, Interdisciplinary Res Ctr, Cambridge CB2 3QZ, England

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2002年 / 372卷 / PART 2期

关键词：

coated conductors; grain boundaries; percolation; computer simulation;

D O I：

10.1016/S0921-4534(02)00902-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A computer model has been developed to simulate Current percolation and dissipation in coated conductors. Experimentally measured grain morphologies as well as model geometries were studied. It was assumed that the dissipation is generated entirely at grain boundaries (GB's) by viscous flux flow. Therefore, each GB had a piecewise linear current-voltage (I-V) characteristic. The current distribution and flux penetration were calculated using standard methods of linear optimisation. I-V characteristics and critical currents were calculated as function of various processing and electromagnetic parameters. The I-V curves showed a power-law scaling which is typical for percolative processes. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：767 / 770

页数：4

共 15 条

[1]

[Anonymous], LINEAR NONLINEAR PRO

[2] Observation of viscous flux flow in YBa2Cu3O7-δ low-angle grain boundaries [J].