Nonmonotonic effects of perpendicular magnetic anisotropy on current-driven vortex wall motions in magnetic nanostripes

In a magnetic nanostripe, the effects of perpendicular magnetic anisotropy（PMA） on the current-driven horizontal motion of vortex wall along the stripe and the vertical motion of the vortex core are studied by micromagnetic simulations.The results show that the horizontal and vertical motion can gen...

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Bibliographic Details
Published in:Chinese physics B 2015-09, Vol.24 (9), p.527-531
Main Author: 苏垣昌 雷海洋 胡经国
Format: Article
Language:English
Subjects:
Confining
Fluid flow
Horizontal
Magnetic anisotropy
Nanostructure
Vertical motion
Vortices
Walls
垂直磁各向异性
垂直运动
旋壁
涡核
电流驱动
磁性
纳米带
非单调
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Summary:In a magnetic nanostripe, the effects of perpendicular magnetic anisotropy（PMA） on the current-driven horizontal motion of vortex wall along the stripe and the vertical motion of the vortex core are studied by micromagnetic simulations.The results show that the horizontal and vertical motion can generally be monotonously enhanced by PMA. However, when the current is small, a nonmonotonic phenomenon for the horizontal motion is found. Namely, the velocity of the horizontal motion firstly decreases and then increases with the increase of the PMA. We find that the reason for this is that the PMA can firstly increase and then decrease the confining force induced by the confining potential energy. In addition, the PMA always enhances the driving force induced by the current.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/9/097506