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Journal Article

Two-body problem of core-region coupled magnetic vortex stacks

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Meier,  Guido
Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg, Germany;

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http://dx.doi.org/10.1103/PhysRevB.93.054411
(Publisher version)

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PhysRevB.93.054411.pdf
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Citation

Hänze, M., Adolff, C. F., Velten, S., Weigand, M., & Meier, G. (2016). Two-body problem of core-region coupled magnetic vortex stacks. Physical Review B, 93(5): 054411. doi:10.1103/PhysRevB.93.054411.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-AA64-3
Abstract
The dynamics of all four combinations of possible polarity and circularity states in a stack of two vortices is investigated by time-resolved scanning transmission x-ray microscopy. The vortex stacks are excited by unidirectional magnetic fields leading to a collective oscillation. Four different modes are observed that depend on the relative polarizations and circularities of the stacks. They are excited to a driven oscillation. We observe a repulsive and attractive interaction of the vortex cores depending on their relative polarizations. The nonlinearity of this core interaction results in different trajectories that describe a two-body problem.