Non-linear vortex dynamics and transient effects in ferromagnetic disks
arXiv:0901.0864 · doi:10.1103/PhysRevB.79.172411
Abstract
We report a time resolved imaging and micromagnetic simulation study of the relaxation dynamics of a magnetic vortex in the non-linear regime. We use time-resolved photoemission electron microscopy and micromagnetic calculations to examine the emergence of non-linear vortex dynamics in patterned Ni80Fe20 disks in the limit of long field pulses. We show for core shifts beyond ~20-25% of the disk radius, the initial motion is characterized by distortions of the vortex, a transient cross-tie wall state, and instabilities in the core polarization that influence the core trajectories.
11 pages, 3 figures, submitted to Phys. Rev. Lett
References in corpus (5)
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- Detection of domain wall eigenfrequency in infinity-shaped magnetic nanostructures