Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells

Abstract We performed finite-element micromagnetic simulations to examine the formation of skyrmions without intrinsic Dzyaloshinskii–Moriya interaction (DMI) in magnetic hemispherical shells. We found that curvature-induced DM-like interaction allows for further stabilization of skyrmions without t...

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Autores principales:	Jaehak Yang, Claas Abert, Dieter Suess, Sang-Koog Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2df9ed02d27b407d93bde4c8686c1987
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spelling	oai:doaj.org-article:2df9ed02d27b407d93bde4c8686c19872021-12-02T12:11:45ZIntrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells10.1038/s41598-021-81624-72045-2322https://doaj.org/article/2df9ed02d27b407d93bde4c8686c19872021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81624-7https://doaj.org/toc/2045-2322Abstract We performed finite-element micromagnetic simulations to examine the formation of skyrmions without intrinsic Dzyaloshinskii–Moriya interaction (DMI) in magnetic hemispherical shells. We found that curvature-induced DM-like interaction allows for further stabilization of skyrmions without the DMI in curved-geometry hemispherical shells for a specific range of uniaxial perpendicular magnetic anisotropy (PMA) constant K u . The larger the curvature of the shell, the higher the K u value required for the formation of the skyrmions. With well-stabilized skyrmions, we also found in-plane gyration modes and azimuthal spin-wave modes as well as an out-of-plane breathing mode, similarly to previously found modes for planar geometries. Furthermore, additional higher-frequency hybrid modes were observed due to coupling between the gyration and azimuthal modes. This work provides further physical insight into the static and dynamic properties of intrinsic DMI-free skyrmions formed in curved-geometry systems.Jaehak YangClaas AbertDieter SuessSang-Koog KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jaehak Yang Claas Abert Dieter Suess Sang-Koog Kim Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
description	Abstract We performed finite-element micromagnetic simulations to examine the formation of skyrmions without intrinsic Dzyaloshinskii–Moriya interaction (DMI) in magnetic hemispherical shells. We found that curvature-induced DM-like interaction allows for further stabilization of skyrmions without the DMI in curved-geometry hemispherical shells for a specific range of uniaxial perpendicular magnetic anisotropy (PMA) constant K u . The larger the curvature of the shell, the higher the K u value required for the formation of the skyrmions. With well-stabilized skyrmions, we also found in-plane gyration modes and azimuthal spin-wave modes as well as an out-of-plane breathing mode, similarly to previously found modes for planar geometries. Furthermore, additional higher-frequency hybrid modes were observed due to coupling between the gyration and azimuthal modes. This work provides further physical insight into the static and dynamic properties of intrinsic DMI-free skyrmions formed in curved-geometry systems.
format	article
author	Jaehak Yang Claas Abert Dieter Suess Sang-Koog Kim
author_facet	Jaehak Yang Claas Abert Dieter Suess Sang-Koog Kim
author_sort	Jaehak Yang
title	Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
title_short	Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
title_full	Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
title_fullStr	Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
title_full_unstemmed	Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
title_sort	intrinsic dmi-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2df9ed02d27b407d93bde4c8686c1987
work_keys_str_mv	AT jaehakyang intrinsicdmifreeskyrmionformationandrobustdynamicbehaviorsinmagnetichemisphericalshells AT claasabert intrinsicdmifreeskyrmionformationandrobustdynamicbehaviorsinmagnetichemisphericalshells AT dietersuess intrinsicdmifreeskyrmionformationandrobustdynamicbehaviorsinmagnetichemisphericalshells AT sangkoogkim intrinsicdmifreeskyrmionformationandrobustdynamicbehaviorsinmagnetichemisphericalshells
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Intrinsic DMI-free skyrmion formation and robust dynamic behaviors in magnetic hemispherical shells

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