An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers

Magnetic skyrmions are topologically nontrivial spin structures, and their existence in ferromagnetically coupled multilayers has been widely reported with a disordered arrangement. Here, a nucleation scenario of ordered skyrmions in nanostructured synthetic antiferromagnetic (SAF) multilayers is pr...

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Main Authors: Li,Yong, Feng, Qiyuan, Li, Sihua, Huang, Ke, Ma, Mangyuan, Gan, Weiliang, Zhou, Haibiao, Jin, Xiangjun, Wang, Renshaw Xiao, Lu, Yalin, Lew, Wen Siang, Lu, Qingyou, Ma, Fusheng
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/151385
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1513852023-02-28T19:54:01Z An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers Li,Yong Feng, Qiyuan Li, Sihua Huang, Ke Ma, Mangyuan Gan, Weiliang Zhou, Haibiao Jin, Xiangjun Wang, Renshaw Xiao Lu, Yalin Lew, Wen Siang Lu, Qingyou Ma, Fusheng School of Physical and Mathematical Sciences Science::Physics Magnetization Imaging Skyrmions Magnetic skyrmions are topologically nontrivial spin structures, and their existence in ferromagnetically coupled multilayers has been widely reported with a disordered arrangement. Here, a nucleation scenario of ordered skyrmions in nanostructured synthetic antiferromagnetic (SAF) multilayers is proposed and experimentally demonstrated using direct magnetization imaging, indirect magnetometer and magnetoresistance measurement, and micromagnetic simulation. Instead of relying on Dzyaloshinskii–Moriya interaction, the antiferromagnetic interlayer exchange coupling in the SAF multilayers fulfills the role of nucleation and stabilization of skyrmions. The robustness of the proposed skyrmion nucleation scenario is examined against temperature from 4.5 to 300 K and device size from 400 to 1200 nm. Interestingly, these synthetic skyrmions still behave well with a size less than 100 nm. The higher stability than generic magnetic domains can be attributed to topological protection. The results thus provide an artificial skyrmion platform to meet the functional needs of high density and designable arrangement in magnonic and spintronic applications. Ministry of Education (MOE) National Research Foundation (NRF) Accepted version 2021-06-13T11:43:31Z 2021-06-13T11:43:31Z 2020 Journal Article Li, Y., Feng, Q., Li, S., Huang, K., Ma, M., Gan, W., Zhou, H., Jin, X., Wang, R. X., Lu, Y., Lew, W. S., Lu, Q. & Ma, F. (2020). An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers. Advanced Functional Materials, 30(3), 1907140-. https://dx.doi.org/10.1002/adfm.201907140 1616-3028 0000-0002-2290-8744 https://hdl.handle.net/10356/151385 10.1002/adfm.201907140 2-s2.0-85074557097 3 30 1907140 en Advanced Functional Materials This is the peer reviewed version of the following article: Li, Y., Feng, Q., Li, S., Huang, K., Ma, M., Gan, W., Zhou, H., Jin, X., Wang, R. X., Lu, Y., Lew, W. S., Lu, Q. & Ma, F. (2020). An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers. Advanced Functional Materials, 30(3), 1907140-. https://dx.doi.org/10.1002/adfm.201907140, which has been published in final form at https://doi.org/10.1002/adfm.201907140. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Magnetization Imaging
Skyrmions
spellingShingle Science::Physics
Magnetization Imaging
Skyrmions
Li,Yong
Feng, Qiyuan
Li, Sihua
Huang, Ke
Ma, Mangyuan
Gan, Weiliang
Zhou, Haibiao
Jin, Xiangjun
Wang, Renshaw Xiao
Lu, Yalin
Lew, Wen Siang
Lu, Qingyou
Ma, Fusheng
An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
description Magnetic skyrmions are topologically nontrivial spin structures, and their existence in ferromagnetically coupled multilayers has been widely reported with a disordered arrangement. Here, a nucleation scenario of ordered skyrmions in nanostructured synthetic antiferromagnetic (SAF) multilayers is proposed and experimentally demonstrated using direct magnetization imaging, indirect magnetometer and magnetoresistance measurement, and micromagnetic simulation. Instead of relying on Dzyaloshinskii–Moriya interaction, the antiferromagnetic interlayer exchange coupling in the SAF multilayers fulfills the role of nucleation and stabilization of skyrmions. The robustness of the proposed skyrmion nucleation scenario is examined against temperature from 4.5 to 300 K and device size from 400 to 1200 nm. Interestingly, these synthetic skyrmions still behave well with a size less than 100 nm. The higher stability than generic magnetic domains can be attributed to topological protection. The results thus provide an artificial skyrmion platform to meet the functional needs of high density and designable arrangement in magnonic and spintronic applications.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Li,Yong
Feng, Qiyuan
Li, Sihua
Huang, Ke
Ma, Mangyuan
Gan, Weiliang
Zhou, Haibiao
Jin, Xiangjun
Wang, Renshaw Xiao
Lu, Yalin
Lew, Wen Siang
Lu, Qingyou
Ma, Fusheng
format Article
author Li,Yong
Feng, Qiyuan
Li, Sihua
Huang, Ke
Ma, Mangyuan
Gan, Weiliang
Zhou, Haibiao
Jin, Xiangjun
Wang, Renshaw Xiao
Lu, Yalin
Lew, Wen Siang
Lu, Qingyou
Ma, Fusheng
author_sort Li,Yong
title An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
title_short An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
title_full An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
title_fullStr An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
title_full_unstemmed An artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
title_sort artificial skyrmion platform with robust tunability in synthetic antiferromagnetic multilayers
publishDate 2021
url https://hdl.handle.net/10356/151385
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