Dependence of domain wall structure for low field injection into magnetic nanowires

Kunz, Andrew; Reiff, Sarah C.
May 2009
Applied Physics Letters;5/11/2009, Vol. 94 Issue 19, p192504
Academic Journal
Micromagnetic simulation is used to model the injection of a domain wall into a magnetic nanowire with field strengths less than the so-called Walker field. This ensures fast, reliable motion of the wall [N. L. Schryer and L. R. Walker, J. Appl. Phys. 45, 5406 (1974)]. When the wire is located at the edge of a small injecting disk, a bias field used to control the orientation of the domain wall can reduce the pinning potential of the structure. The low field injection is explained by a simple model, which relies on the topological nature of a domain wall. The technique can quickly inject multiple domain walls with a known magnetic structure.


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