The spin structures of interlayer coupled magnetic films with opposite chirality

Abstract Using Monte-Carlo simulations and micromagnetic simulations, we reveal how the spin structural correlation and the skyrmion dynamics are affected by the interlayer coupling in a chiral magnetic bilayer system, in which the two layers have opposite chirality. The interaction through interlay...

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Autores principales:	S. P. Kang, N. J. Kim, H. Y. Kwon, J. W. Choi, B. C. Min, C. Won
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/757e1740874e4f36851eef2f333f0fcb
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spelling	oai:doaj.org-article:757e1740874e4f36851eef2f333f0fcb2021-12-02T15:08:34ZThe spin structures of interlayer coupled magnetic films with opposite chirality10.1038/s41598-018-20800-82045-2322https://doaj.org/article/757e1740874e4f36851eef2f333f0fcb2018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-20800-8https://doaj.org/toc/2045-2322Abstract Using Monte-Carlo simulations and micromagnetic simulations, we reveal how the spin structural correlation and the skyrmion dynamics are affected by the interlayer coupling in a chiral magnetic bilayer system, in which the two layers have opposite chirality. The interaction through interlayer coupling between chiral magnetic structures influences the static and dynamics properties profoundly. The competition between the Dzyaloshinskii-Moriya interaction and the interlayer interaction allows multiple magnetic structures to be energetically stable, which includes sole skyrmion states (skyrmion appears in only one of the layers) and skyrmion pair states (coupled skyrmions in top and bottom layers). When current driven spin transfer torques are applied to each state, the sole skyrmion state is mainly propelled by a spin transfer torque causing the skyrmion hall effect, but the skyrmion pair state is propelled by a torque from skyrmion-skyrmion interaction and not influenced by the skyrmion hall effect. Also upon application of an external magnetic field, we found the skyrmions in a skyrmion pair state extinguish in an exclusive way, as the annihilation of a skyrmion in one of the layers stabilizes the once paired skyrmion in the other layer, i.e. the skyrmion lattice sites have only one skyrmion in either layer.S. P. KangN. J. KimH. Y. KwonJ. W. ChoiB. C. MinC. WonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. P. Kang N. J. Kim H. Y. Kwon J. W. Choi B. C. Min C. Won The spin structures of interlayer coupled magnetic films with opposite chirality
description	Abstract Using Monte-Carlo simulations and micromagnetic simulations, we reveal how the spin structural correlation and the skyrmion dynamics are affected by the interlayer coupling in a chiral magnetic bilayer system, in which the two layers have opposite chirality. The interaction through interlayer coupling between chiral magnetic structures influences the static and dynamics properties profoundly. The competition between the Dzyaloshinskii-Moriya interaction and the interlayer interaction allows multiple magnetic structures to be energetically stable, which includes sole skyrmion states (skyrmion appears in only one of the layers) and skyrmion pair states (coupled skyrmions in top and bottom layers). When current driven spin transfer torques are applied to each state, the sole skyrmion state is mainly propelled by a spin transfer torque causing the skyrmion hall effect, but the skyrmion pair state is propelled by a torque from skyrmion-skyrmion interaction and not influenced by the skyrmion hall effect. Also upon application of an external magnetic field, we found the skyrmions in a skyrmion pair state extinguish in an exclusive way, as the annihilation of a skyrmion in one of the layers stabilizes the once paired skyrmion in the other layer, i.e. the skyrmion lattice sites have only one skyrmion in either layer.
format	article
author	S. P. Kang N. J. Kim H. Y. Kwon J. W. Choi B. C. Min C. Won
author_facet	S. P. Kang N. J. Kim H. Y. Kwon J. W. Choi B. C. Min C. Won
author_sort	S. P. Kang
title	The spin structures of interlayer coupled magnetic films with opposite chirality
title_short	The spin structures of interlayer coupled magnetic films with opposite chirality
title_full	The spin structures of interlayer coupled magnetic films with opposite chirality
title_fullStr	The spin structures of interlayer coupled magnetic films with opposite chirality
title_full_unstemmed	The spin structures of interlayer coupled magnetic films with opposite chirality
title_sort	spin structures of interlayer coupled magnetic films with opposite chirality
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/757e1740874e4f36851eef2f333f0fcb
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The spin structures of interlayer coupled magnetic films with opposite chirality

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