Vortex avalanches and magnetic flux fragmentation in superconductors

被引：69

作者：

Aranson, I

Gurevich, A

Vinokur, V

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Univ Wisconsin, Ctr Appl Superconduct, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.87.067003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the results of numerical simulations of nonisothermal dendritic flux penetration in type-II superconductors. We propose a generic mechanism of dynamic branching of a propagating hot spot of a flux flow/normal state triggered by a local heat pulse. The branching occurs when the flux hot spot reflects from inhomogeneities or the boundary on which magnetization currents either vanish, or change direction. The hot spot then undergoes a cascade of successive splittings, giving rise to a dissipative dendritic-type flux structure. This dynamic state eventually cools down, turning into a frozen multifilamentary pattern of magnetization currents.

引用

页码：670031 / 670034

页数：4

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