期刊
APPLIED PHYSICS LETTERS
卷 94, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3085971
关键词
cobalt; copper; giant magnetoresistance; iron alloys; magnetic domain walls; magnetic multilayers; magnetic thin films; nickel alloys
资金
- Korean Government [KRF-2007-357-D00112]
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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