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Simultaneous control of magnetic topologies for reconfigurable vortex arrays

Title
Simultaneous control of magnetic topologies for reconfigurable vortex arrays
Authors
Im, Mi-YoungFischer, PeterHan, Hee-SungVogel, AndreasJung, Min-SeungChao, WeilunYu, Young-SangMeier, GuidoHong, Jung-IlLee, Ki-Suk
DGIST Authors
Im, Mi-Young; Jung, Min-Seung
Issue Date
2017-02
Citation
Npg Asia Materials, 9
Type
Article
Article Type
Article
Keywords
CoresDotsFluctuationsPermalloySkyrmion
ISSN
1884-4049
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.
URI
http://hdl.handle.net/20.500.11750/4241
DOI
10.1038/am.2016.199
Publisher
NATURE PUBLISHING GROUP
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceQuantum Electric & Magnetic Materials Laboratory1. Journal Articles


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