Dynamics of Vortex Core Switching in Ferromagnetic Nanodisks

Details Dynamics of Vortex Core Switching in Ferromagnetic Nanodisks Dynamics of Vortex Core Switching in Ferromagnetic Nanodisks

2006-11-25

arxiv.org/abs/cond-mat/0611640v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in Appl. Phys. Lett

Scientific paper

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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