Current-driven vortex formation in a magnetic multilayer ring

被引：19
|
作者：
Nam, Chunghee [1 ]
Ng, B. G. [1 ]
Castano, F. J. [1 ]
Mascaro, M. D. [1 ]
Ross, C. A. [1 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 08期
关键词：
cobalt; copper; giant magnetoresistance; iron alloys; magnetic domain walls; magnetic multilayers; magnetic thin films; nickel alloys; DOMAIN-WALL MOTION; SPIN-VALVE;
D O I：
10.1063/1.3085971
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Current-driven domain wall (DW) motion has been studied in the NiFe layer of a Co/Cu/NiFe thin film ring using giant-magnetoresistance measurements in a four-point contact geometry. The NiFe layer is initially in an onion state configuration with two 180 degrees DWs. An electric current drives the walls around the ring so that they annihilate and the NiFe layer forms a DW-free vortex state. The direction of motion of the two DWs is determined by the current polarity, enabling the vortex chirality to be selected.
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页数：3
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