Journal
APPLIED PHYSICS LETTERS
Volume 89, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2424673
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Dynamics of magnetic vortex core switching in nanometer-scale Permalloy disk, having a single vortex ground state, was investigated by micromagnetic modeling. When an in-plane magnetic field pulse with an appropriate strength and duration is applied to the vortex structure, additional two vortices, i.e., a circular and an antivortex, are created near the original vortex core. Sequentially, the vortex-antivortex pair annihilates. A spin wave is created at the annihilation point and propagated through the entire element; the relaxed state for the system is the single vortex state with a switched vortex core. (c) 2006 American Institute of Physics.
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