Current-driven domain wall depinning from an anisotropy boundary in nanowires

被引：3
|
作者：
Gerhardt, T. [1 ,2 ]
Drews, A. [1 ,2 ]
Meier, G. [1 ,2 ]
机构：
[1] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany
[2] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Hamburg, Germany
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2014年 / 26卷 / 20期
关键词：
domain wall dynamics; depinning; anisotropy boundary; nanowire; micromagnetism; MOTION; FIELD;
D O I：
10.1088/0953-8984/26/20/206001
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The interaction of a current-driven domain wall with an anisotropy boundary in nanowires with perpendicular magnetic anisotropy is investigated. A local reduction of the anisotropy constant is used to create an artificial boundary where the domain wall gets pinned. Micromagnetic simulations and analytical calculations, based on a one-dimensional model, are employed to describe the interaction of the domain wall and the anisotropy boundary and to determine the depinning current densities. Two different pinning regimes-an intrinsic and an extrinsic-can be identified in dependence with the characteristic of the boundary. A very good agreement between simulated and analytically obtained data is achieved.
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页数：7
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