Magnetostatic control of vortex chirality in Co thin film rings

Nam, Chunghee; Mascaro, M. D.; Ross, C. A.
July 2010
Applied Physics Letters;7/5/2010, Vol. 97 Issue 1, p012505
Academic Journal
The vortex chirality in an elliptical Co ring spaced 60 nm from a circular ring has been controlled by magnetostatic interaction. One of the two domain walls (DWs) in the elliptical ring interacts with a neighboring wall in the circular ring, while the other is unaffected by the stray field of the circular ring. The direction of motion of the DWs, and the chirality of the resulting vortex state in the elliptical ring, can be selected by the field direction and history.


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