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Lee, Ki-Suk
Creative Lab. for Advanced Spin Systems (CLASS)
Research Interests
  • Magnetism, spintronics, spin dynamics, rare-earth free magnet

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Stochastic formation of magnetic vortex structures in asymmetric disks triggered by chaotic dynamics

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Title
Stochastic formation of magnetic vortex structures in asymmetric disks triggered by chaotic dynamics
Author
Im, Mi-YoungLee, Ki-SukVogel, AndreasHong, Jung-IlMeier, GuidoFischer, Peter
Issue Date
2014-12
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.5, pp.5620
Abstract
The non-trivial spin configuration in a magnetic vortex is a prototype for fundamental studies of nanoscale spin behaviour with potential applications in magnetic information technologies. Arrays of magnetic vortices interfacing with perpendicular thin films have recently been proposed as enabler for skyrmionic structures at room temperature, which has opened exciting perspectives on practical applications of skyrmions. An important milestone for achieving not only such skyrmion materials but also general applications of magnetic vortices is a reliable control of vortex structures. However, controlling magnetic processes is hampered by stochastic behaviour, which is associated with thermal fluctuations in general. Here we show that the dynamics in the initial stages of vortex formation on an ultrafast timescale plays a dominating role for the stochastic behaviour observed at steady state. Our results show that the intrinsic stochastic nature of vortex creation can be controlled by adjusting the interdisk distance in asymmetric disk arrays.
URI
https://scholarworks.unist.ac.kr/handle/201301/9984
URL
http://www.nature.com/doifinder/10.1038/ncomms6620
DOI
10.1038/ncomms6620
ISSN
2041-1723
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