Vortex avalanches and magnetic flux fragmentation in superconductors
超导电性
2016-08-31 v1 材料科学
摘要
We report results of numerical simulations of non isothermal dendritic flux penetration in type-II superconductors. We propose a generic mechanism of dynamic branching of a propagating hotspot of a flux flow/normal state triggered by a local heat pulse. The branching occurs when the flux hotspot reflects from inhomogeneities or the boundary on which magnetization currents either vanish, or change direction. Then the hotspot 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 multi-filamentary pattern of magnetization currents.
引用
@article{arxiv.cond-mat/0106353,
title = {Vortex avalanches and magnetic flux fragmentation in superconductors},
author = {Igor Aranson and Alex Gurevich and Valerii Vinokur},
journal= {arXiv preprint arXiv:cond-mat/0106353},
year = {2016}
}
备注
4 pages, 4 figures, accepted to Phys. Rev. Lett