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  Simultaneous control of magnetic topologies for reconfigurable vortex arrays

Im, M.-Y., Fischer, P., Han, H.-S., Vogel, A., Jung, M.-S., Chao, W., et al. (2017). Simultaneous control of magnetic topologies for reconfigurable vortex arrays. NPG Asia Materials, 9: e348. doi:10.1038/am.2016.199.

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https://dx.doi.org/10.1038/am.2016.199 (Publisher version)


Im, Mi-Young1, 2, Author
Fischer, Peter3, 4, Author
Han, Hee-Sung5, Author
Vogel, Andreas6, Author
Jung, Min-Seung2, Author
Chao, Weilun1, Author
Yu, Young-Sang7, Author
Meier, G.6, 8, 9, Author              
Hong, Jung-Il2, Author
Lee, Ki-Suk5, Author
11Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA, USA, ou_persistent22              
2Department of Emerging Materials Science, DGIST, Daegu, Korea, ou_persistent22              
33Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA;, ou_persistent22              
4Department of Physics, University of California, Santa Cruz, CA, USA, ou_persistent22              
55School of Materials Science and Engineering, KIST-UNIST Ulsan Center for Convergent Materials, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea, ou_persistent22              
6Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, Hamburg, Germany, ou_persistent22              
7Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA, ou_persistent22              
8The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany, ou_persistent22              
9Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074319              


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 Abstract: The topological spin textures in magnetic vortices in confined magnetic elements offer a platform for understanding the fundamental physics of nanoscale spin behavior and the potential of harnessing their unique spin structures for advanced magnetic technologies. For magnetic vortices to be practical, an effective reconfigurability of the two topologies of magnetic vortices, that is, the circularity and the polarity, is an essential prerequisite. The reconfiguration issue is highly relevant to the question of whether both circularity and polarity are reliably and efficiently controllable. In this work, we report the first direct observation of simultaneous control of both circularity and polarity by the sole application of an in-plane magnetic field to arrays of asymmetrically shaped permalloy disks. Our investigation demonstrates that a high degree of reliability for control of both topologies can be achieved by tailoring the geometry of the disk arrays. We also propose a new approach to control the vortex structures by manipulating the effect of the stray field on the dynamics of vortex creation. The current study is expected to facilitate complete and effective reconfiguration of magnetic vortex structures, thereby enhancing the prospects for technological applications of magnetic vortices.


Language(s): eng - English
 Dates: 2017-02-10
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1038/am.2016.199
 Degree: -



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Project name : This work was supported by the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science and Technology (MEST) (2012K1A4A3053565, 2014R1A2A2A01003709, 2015M3D1A1070465 and 2016K1A3A7A09005336), by the KIST-UNIST partnership program (1.160097.01/2V05150). Work at the ALS was supported by the Director, Office of Science, Office of Basic Energy Sciences, Scientific User Facilities Division of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. PF acknowledges support by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231 within the Non-Equilibrium Magnetic Materials Program (MSMAG). AV and GM acknowledge financial support from the Deutsche Forschungsgemeinschaft via SFB 668 ‘Magnetism from the Single Atom to the Nanostructure’, via Graduiertenkolleg 1286 ‘Functional Metal-Semiconductor Hybrid Systems’, and via excellence cluster ‘The Hamburg Centre for Ultrafast Imaging—Structure, Dynamics and Control of Matter on the Atomic Scale’.
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Source 1

Title: NPG Asia Materials
Source Genre: Journal
Publ. Info: New York : Nature Publishing Group
Pages: - Volume / Issue: 9 Sequence Number: e348 Start / End Page: - Identifier: ISSN: 1884-4049
CoNE: https://pure.mpg.de/cone/journals/resource/1884-4049