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

Im, M.-Y., Lee, K.-S., Vogel, A., Hong, J.-I., Meier, G., & Fischer, P. (2014). Stochastic formation of magnetic vortex structures in asymmetric disks triggered by chaotic dynamics. Nature Communications, 5: 5620. doi:10.1038/ncomms6620.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-C446-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-CCCE-2
Genre: Journal Article

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http://dx.doi.org/10.1038/ncomms6620 (Publisher version)
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 Creators:
Im, Mi-Young1, 2, Author
Lee, Ki-Suk3, Author
Vogel, Andreas4, Author
Hong, Jung-Il2, Author
Meier, Guido4, 5, 6, 7, Author              
Fischer, Peter1, 8, Author
Affiliations:
1Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, ou_persistent22              
2Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology, Daegu 711-873, Korea, ou_persistent22              
3School of Materials Science and Engineering, KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology, Ulsan 689-798, Korea, ou_persistent22              
4Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, 20355 Hamburg, Germany, ou_persistent22              
5Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074323              
6Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074319              
7Hamburg Centre for Ultrafast Imaging, University of Hamburg, 22761 Hamburg, Germany, ou_persistent22              
8Physics Department, University of California, Santa Cruz, California 94056, USA, ou_persistent22              

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Free keywords: Condensed matter; Materials science
 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.

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Language(s): eng - English
 Dates: 2014-04-022014-10-212014-12-17
 Publication Status: Published online
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/ncomms6620
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 5 Sequence Number: 5620 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: /journals/resource/2041-1723