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Microwave field frequency and current density modulated skyrmion-chain in nanotrack

Magnetic skyrmions are promising candidates as information carriers for the next-generation spintronic devices because of their small size, facile current-driven motion and topological stability. The controllable nucleation and motion of skyrmions in magnetic nanostructures will be essential in futu...

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Detalles Bibliográficos
Autores principales: Ma, Fusheng, Ezawa, Motohiko, Zhou, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606831/
https://www.ncbi.nlm.nih.gov/pubmed/26468929
http://dx.doi.org/10.1038/srep15154
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author Ma, Fusheng
Ezawa, Motohiko
Zhou, Yan
author_facet Ma, Fusheng
Ezawa, Motohiko
Zhou, Yan
author_sort Ma, Fusheng
collection PubMed
description Magnetic skyrmions are promising candidates as information carriers for the next-generation spintronic devices because of their small size, facile current-driven motion and topological stability. The controllable nucleation and motion of skyrmions in magnetic nanostructures will be essential in future skyrmionic devices. Here, we present the microwave assisted nucleation and motion of skyrmion-chains in magnetic nanotrack by micromagnetic simulation. A skyrmion-chain is a one-dimensional cluster of equally spaced skyrmions. A skyrmion-chain conveys an integer bit n when it consists of n skyrmions. A series of skyrmion-chains with various lengths is generated and moved in the nanotrack driven by spin-polarized current. The period, length and spacing of the skyrmion-chains can be dynamically manipulated by controlling either the frequency of the microwave field or the time dependent spin-polarized current density. A skyrmion-chain behaves as a massless particle, where it stops without delay when the current is stopped. Their velocity is found to be linearly dependent on the current density and insensitive to the frequency and amplitude of the excitation microwave field. Uniform motion of trains of skyrmion-chains in nanotrack offers a promising approach for spintronic multi-bit memories containing series of skyrmion-chains to represent data stream.
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spelling pubmed-46068312015-10-28 Microwave field frequency and current density modulated skyrmion-chain in nanotrack Ma, Fusheng Ezawa, Motohiko Zhou, Yan Sci Rep Article Magnetic skyrmions are promising candidates as information carriers for the next-generation spintronic devices because of their small size, facile current-driven motion and topological stability. The controllable nucleation and motion of skyrmions in magnetic nanostructures will be essential in future skyrmionic devices. Here, we present the microwave assisted nucleation and motion of skyrmion-chains in magnetic nanotrack by micromagnetic simulation. A skyrmion-chain is a one-dimensional cluster of equally spaced skyrmions. A skyrmion-chain conveys an integer bit n when it consists of n skyrmions. A series of skyrmion-chains with various lengths is generated and moved in the nanotrack driven by spin-polarized current. The period, length and spacing of the skyrmion-chains can be dynamically manipulated by controlling either the frequency of the microwave field or the time dependent spin-polarized current density. A skyrmion-chain behaves as a massless particle, where it stops without delay when the current is stopped. Their velocity is found to be linearly dependent on the current density and insensitive to the frequency and amplitude of the excitation microwave field. Uniform motion of trains of skyrmion-chains in nanotrack offers a promising approach for spintronic multi-bit memories containing series of skyrmion-chains to represent data stream. Nature Publishing Group 2015-10-15 /pmc/articles/PMC4606831/ /pubmed/26468929 http://dx.doi.org/10.1038/srep15154 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Ma, Fusheng
Ezawa, Motohiko
Zhou, Yan
Microwave field frequency and current density modulated skyrmion-chain in nanotrack
title Microwave field frequency and current density modulated skyrmion-chain in nanotrack
title_full Microwave field frequency and current density modulated skyrmion-chain in nanotrack
title_fullStr Microwave field frequency and current density modulated skyrmion-chain in nanotrack
title_full_unstemmed Microwave field frequency and current density modulated skyrmion-chain in nanotrack
title_short Microwave field frequency and current density modulated skyrmion-chain in nanotrack
title_sort microwave field frequency and current density modulated skyrmion-chain in nanotrack
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4606831/
https://www.ncbi.nlm.nih.gov/pubmed/26468929
http://dx.doi.org/10.1038/srep15154
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