Simultaneous control of magnetic topologies for reconfigurable vortex arrays

Im, Mi-Young; Fischer, Peter; Han, Hee-Sung; Vogel, Andreas; Jung, Min-Seung; Chao, Weilun; Yu, Young-Sang; Meier, Guido; Hong, Jung-Il; Lee, Ki-Suk

doi:10.1038/am.2016.199

Simultaneous control of magnetic topologies for reconfigurable vortex arrays

Journal Article · Fri Feb 10 04:00:00 EST 2017 · NPG Asia Materials (Online)

DOI:https://doi.org/10.1038/am.2016.199· OSTI ID:1379710

Im, Mi-Young ^[1]; Fischer, Peter ^[2]; Han, Hee-Sung ^[3]; Vogel, Andreas ^[4]; Jung, Min-Seung ^[5]; Chao, Weilun ^[6]; Yu, Young-Sang ^[7]; Meier, Guido ^[8]; Hong, Jung-Il ^[5]; Lee, Ki-Suk ^[3]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Center for X-ray Optics; Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu (Korea). Dept. of Emerging Materials Science
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Science Division; Univ. of California, Santa Cruz, CA (United States). Dept. of Physics
Ulsan Center for Convergent Materials (Korea). Ulsan National Inst. of Science and Technology (UNIST)
Univ. of Hamburg (Germany). Inst. of Applied Physics and Center for Microstructure Research
Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu (Korea). Dept. of Emerging Materials Science
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Center for X-ray Optics
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Univ. of Hamburg (Germany). Inst. of Applied Physics and Center for Microstructure Research; Hamburg Cenre for Ultrafast Imaging, Hamburg (Germany); Max Planck Inst. for the Structure and Dynamics f Matter, Hamburg (Germany)

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.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1379710

Journal Information:: NPG Asia Materials (Online), Journal Name: NPG Asia Materials (Online) Journal Issue: 2 Vol. 9; ISSN 1884-4057

Publisher:: Nature Publishing Group AsiaCopyright Statement

Country of Publication:: United States

Language:: English

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