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Dynamics of Vortex Core Switching in Ferromagnetic Nanodisks

Q. F. Xiao·J. Rudge·B. C. Choi·Y. K. Hong·G. Donohoe
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Abstract

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 anti-vortex, 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.

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Q. F. Xiao, J. Rudge, B. C. Choi, Y. K. Hong, G. Donohoe. 2006-11-25. Dynamics of Vortex Core Switching in Ferromagnetic Nanodisks. https://doi.org/10.1063/1.2424673

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