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Nanometric alternating magnetic field generator

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 alternati...

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Detalles Bibliográficos
Autores principales: Espejo, A. P., Tejo, F., Vidal-Silva, N., Escrig, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5498549/
https://www.ncbi.nlm.nih.gov/pubmed/28680166
http://dx.doi.org/10.1038/s41598-017-05026-4
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author Espejo, A. P.
Tejo, F.
Vidal-Silva, N.
Escrig, J.
author_facet Espejo, A. P.
Tejo, F.
Vidal-Silva, N.
Escrig, J.
author_sort Espejo, A. P.
collection PubMed
description 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.
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spelling pubmed-54985492017-07-10 Nanometric alternating magnetic field generator Espejo, A. P. Tejo, F. Vidal-Silva, N. Escrig, J. Sci Rep Article 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. Nature Publishing Group UK 2017-07-05 /pmc/articles/PMC5498549/ /pubmed/28680166 http://dx.doi.org/10.1038/s41598-017-05026-4 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Espejo, A. P.
Tejo, F.
Vidal-Silva, N.
Escrig, J.
Nanometric alternating magnetic field generator
title 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_short Nanometric alternating magnetic field generator
title_sort nanometric alternating magnetic field generator
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5498549/
https://www.ncbi.nlm.nih.gov/pubmed/28680166
http://dx.doi.org/10.1038/s41598-017-05026-4
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