Nanometric alternating magnetic field generator

Abstract In this work we introduce an alternating magnetic field generator in a cylindrical nanostructure. This field appears due to the rotation of a magnetic domain wall located at some position, generating a magnetic region that varies its direction of magnetization alternately, thus inducing an...

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Autores principales:	A. P. Espejo, F. Tejo, N. Vidal-Silva, J. Escrig
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7d502c24175345a2a56cd0a4ba1021d4
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id	oai:doaj.org-article:7d502c24175345a2a56cd0a4ba1021d4
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spelling	oai:doaj.org-article:7d502c24175345a2a56cd0a4ba1021d42021-12-02T16:07:48ZNanometric alternating magnetic field generator10.1038/s41598-017-05026-42045-2322https://doaj.org/article/7d502c24175345a2a56cd0a4ba1021d42017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05026-4https://doaj.org/toc/2045-2322Abstract In this work we introduce an alternating magnetic field generator in a cylindrical nanostructure. This field appears due to the rotation of a magnetic domain wall located at some position, generating a magnetic region that varies its direction of magnetization alternately, thus inducing an alternating magnetic flux in its vicinity. This phenomenon occurs due to the competition between a spin-polarized current and a magnetic field, which allows to control both the angular velocity and the pinning position of the domain wall. As proof of concept, we study the particular case of a diameter-modulated nanowire with a spin-polarized current along its axis and the demagnetizing field produced by its modulation. This inhomogeneous field allows one to control the angular velocity of the domain wall as a function of its position along the nanowire allowing frequencies in the GHz range to be achieved. This generator could be used in telecommunications for devices in the range of radiofrequencies or, following Faraday’s induction law, could also induce an electromotive force and be used as a movable alternate voltage source in future nanodevices.A. P. EspejoF. TejoN. Vidal-SilvaJ. EscrigNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. P. Espejo F. Tejo N. Vidal-Silva J. Escrig Nanometric alternating magnetic field generator
description	Abstract In this work we introduce an alternating magnetic field generator in a cylindrical nanostructure. This field appears due to the rotation of a magnetic domain wall located at some position, generating a magnetic region that varies its direction of magnetization alternately, thus inducing an alternating magnetic flux in its vicinity. This phenomenon occurs due to the competition between a spin-polarized current and a magnetic field, which allows to control both the angular velocity and the pinning position of the domain wall. As proof of concept, we study the particular case of a diameter-modulated nanowire with a spin-polarized current along its axis and the demagnetizing field produced by its modulation. This inhomogeneous field allows one to control the angular velocity of the domain wall as a function of its position along the nanowire allowing frequencies in the GHz range to be achieved. This generator could be used in telecommunications for devices in the range of radiofrequencies or, following Faraday’s induction law, could also induce an electromotive force and be used as a movable alternate voltage source in future nanodevices.
format	article
author	A. P. Espejo F. Tejo N. Vidal-Silva J. Escrig
author_facet	A. P. Espejo F. Tejo N. Vidal-Silva J. Escrig
author_sort	A. P. Espejo
title	Nanometric alternating magnetic field generator
title_short	Nanometric alternating magnetic field generator
title_full	Nanometric alternating magnetic field generator
title_fullStr	Nanometric alternating magnetic field generator
title_full_unstemmed	Nanometric alternating magnetic field generator
title_sort	nanometric alternating magnetic field generator
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7d502c24175345a2a56cd0a4ba1021d4
work_keys_str_mv	AT apespejo nanometricalternatingmagneticfieldgenerator AT ftejo nanometricalternatingmagneticfieldgenerator AT nvidalsilva nanometricalternatingmagneticfieldgenerator AT jescrig nanometricalternatingmagneticfieldgenerator
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Nanometric alternating magnetic field generator

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