Tuning domain wall dynamics by shaping nanowires cross-sections

Abstract The understanding of the domain wall (DW) dynamics along magnetic nanowires is crucial for spintronic applications. In this work, we perform a detailed analysis of the transverse DW motion along nanowires with polygonal cross-sections. If the DW displaces under a magnetic field above the Wa...

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Autores principales:	Dora Altbir, Jakson M. Fonseca, Oksana Chubykalo-Fesenko, Rosa M. Corona, Roberto Moreno, Vagson L. Carvalho-Santos, Yurii P. Ivanov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f88dbe7970084e2fa6b6dcb010f1579b
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spelling	oai:doaj.org-article:f88dbe7970084e2fa6b6dcb010f1579b2021-12-02T12:40:41ZTuning domain wall dynamics by shaping nanowires cross-sections10.1038/s41598-020-78761-w2045-2322https://doaj.org/article/f88dbe7970084e2fa6b6dcb010f1579b2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78761-whttps://doaj.org/toc/2045-2322Abstract The understanding of the domain wall (DW) dynamics along magnetic nanowires is crucial for spintronic applications. In this work, we perform a detailed analysis of the transverse DW motion along nanowires with polygonal cross-sections. If the DW displaces under a magnetic field above the Walker limit, the oscillatory motion of the DW is observed. The amplitude, the frequency of oscillations, and the DW velocity depend on the number of sides of the nanowire cross-section, being the DW velocity in a wire with a triangular cross-section one order of magnitude larger than that in a circular nanowire. The decrease in the nanowire cross-section area yields a DW behavior similar to the one presented in a cylindrical nanowire, which is explained using an analytical model based on the general kinetic momentum theorem. Micromagnetic simulations reveal that the oscillatory behavior of the DW comes from energy changes due to deformations of the DW shape during the rotation around the nanowire.Dora AltbirJakson M. FonsecaOksana Chubykalo-FesenkoRosa M. CoronaRoberto MorenoVagson L. Carvalho-SantosYurii P. IvanovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dora Altbir Jakson M. Fonseca Oksana Chubykalo-Fesenko Rosa M. Corona Roberto Moreno Vagson L. Carvalho-Santos Yurii P. Ivanov Tuning domain wall dynamics by shaping nanowires cross-sections
description	Abstract The understanding of the domain wall (DW) dynamics along magnetic nanowires is crucial for spintronic applications. In this work, we perform a detailed analysis of the transverse DW motion along nanowires with polygonal cross-sections. If the DW displaces under a magnetic field above the Walker limit, the oscillatory motion of the DW is observed. The amplitude, the frequency of oscillations, and the DW velocity depend on the number of sides of the nanowire cross-section, being the DW velocity in a wire with a triangular cross-section one order of magnitude larger than that in a circular nanowire. The decrease in the nanowire cross-section area yields a DW behavior similar to the one presented in a cylindrical nanowire, which is explained using an analytical model based on the general kinetic momentum theorem. Micromagnetic simulations reveal that the oscillatory behavior of the DW comes from energy changes due to deformations of the DW shape during the rotation around the nanowire.
format	article
author	Dora Altbir Jakson M. Fonseca Oksana Chubykalo-Fesenko Rosa M. Corona Roberto Moreno Vagson L. Carvalho-Santos Yurii P. Ivanov
author_facet	Dora Altbir Jakson M. Fonseca Oksana Chubykalo-Fesenko Rosa M. Corona Roberto Moreno Vagson L. Carvalho-Santos Yurii P. Ivanov
author_sort	Dora Altbir
title	Tuning domain wall dynamics by shaping nanowires cross-sections
title_short	Tuning domain wall dynamics by shaping nanowires cross-sections
title_full	Tuning domain wall dynamics by shaping nanowires cross-sections
title_fullStr	Tuning domain wall dynamics by shaping nanowires cross-sections
title_full_unstemmed	Tuning domain wall dynamics by shaping nanowires cross-sections
title_sort	tuning domain wall dynamics by shaping nanowires cross-sections
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/f88dbe7970084e2fa6b6dcb010f1579b
work_keys_str_mv	AT doraaltbir tuningdomainwalldynamicsbyshapingnanowirescrosssections AT jaksonmfonseca tuningdomainwalldynamicsbyshapingnanowirescrosssections AT oksanachubykalofesenko tuningdomainwalldynamicsbyshapingnanowirescrosssections AT rosamcorona tuningdomainwalldynamicsbyshapingnanowirescrosssections AT robertomoreno tuningdomainwalldynamicsbyshapingnanowirescrosssections AT vagsonlcarvalhosantos tuningdomainwalldynamicsbyshapingnanowirescrosssections AT yuriipivanov tuningdomainwalldynamicsbyshapingnanowirescrosssections
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Tuning domain wall dynamics by shaping nanowires cross-sections

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