Nonequilibrium dynamics in type-II superconductors with inhomogeneous vortex pinning

被引：0
|
作者：
Xu, X. B. [1 ]
Fangohr, H. [2 ]
Xu, X. N. [1 ]
Gu, M. [1 ]
Ding, S. Y. [1 ]
Shi, D. Q. [3 ]
Dou, S. X. [3 ]
机构：
[1] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Univ Southampton, Sch Engn Sci, Southampton SO17 1BJ, Hants, England
[3] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2009年 / 469卷 / 22期
基金：
中国国家自然科学基金;
关键词：
Langevin dynamics; Negative vortex motion; Inhomogeneous pinning; Relaxation; FLUX-LINE-LATTICE; SIMULATIONS; MEMORY;
D O I：
10.1016/j.physc.2009.09.002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study numerically the dynamics relating to negative vortex motion in inhomogeneous pinning systems. We show that this dynamical phenomenon results from the internal field effect produced by the growing local barriers with decreasing temperature. We find that the negative motion is characterized by a peak of negative voltage or resistance in resistance-temperature transport measurements. We also demonstrate that the time window to observe the negative motion is determined by the magnitude of driving force in addition to the temperature scanning rate. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：2008 / 2011
页数：4
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