Dynamical amplification of magnetoresistances and Hall currents up to the THz regime

Abstract Spin-orbit-related effects offer a highly promising route for reading and writing information in magnetic units of future devices. These phenomena rely not only on the static magnetization orientation but also on its dynamics to achieve fast switchings that can reach the THz range. In this...

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Autores principales:	Filipe S. M. Guimarães, Manuel dos Santos Dias, Juba Bouaziz, Antonio T. Costa, Roberto B. Muniz, Samir Lounis
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5570cecd18d443debd4c3bf85bfe6147
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spelling	oai:doaj.org-article:5570cecd18d443debd4c3bf85bfe61472021-12-02T11:40:53ZDynamical amplification of magnetoresistances and Hall currents up to the THz regime10.1038/s41598-017-03924-12045-2322https://doaj.org/article/5570cecd18d443debd4c3bf85bfe61472017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03924-1https://doaj.org/toc/2045-2322Abstract Spin-orbit-related effects offer a highly promising route for reading and writing information in magnetic units of future devices. These phenomena rely not only on the static magnetization orientation but also on its dynamics to achieve fast switchings that can reach the THz range. In this work, we consider Co/Pt and Fe/W bilayers to show that accounting for the phase difference between different processes is crucial to the correct description of the dynamical currents. By tuning each system towards its ferromagnetic resonance, we reveal that dynamical spin Hall angles can non-trivially change sign and be boosted by over 500%, reaching giant values. We demonstrate that charge and spin pumping mechanisms can greatly magnify or dwindle the currents flowing through the system, influencing all kinds of magnetoresistive and Hall effects, thus impacting also dc and second harmonic experimental measurements.Filipe S. M. GuimarãesManuel dos Santos DiasJuba BouazizAntonio T. CostaRoberto B. MunizSamir LounisNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Filipe S. M. Guimarães Manuel dos Santos Dias Juba Bouaziz Antonio T. Costa Roberto B. Muniz Samir Lounis Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
description	Abstract Spin-orbit-related effects offer a highly promising route for reading and writing information in magnetic units of future devices. These phenomena rely not only on the static magnetization orientation but also on its dynamics to achieve fast switchings that can reach the THz range. In this work, we consider Co/Pt and Fe/W bilayers to show that accounting for the phase difference between different processes is crucial to the correct description of the dynamical currents. By tuning each system towards its ferromagnetic resonance, we reveal that dynamical spin Hall angles can non-trivially change sign and be boosted by over 500%, reaching giant values. We demonstrate that charge and spin pumping mechanisms can greatly magnify or dwindle the currents flowing through the system, influencing all kinds of magnetoresistive and Hall effects, thus impacting also dc and second harmonic experimental measurements.
format	article
author	Filipe S. M. Guimarães Manuel dos Santos Dias Juba Bouaziz Antonio T. Costa Roberto B. Muniz Samir Lounis
author_facet	Filipe S. M. Guimarães Manuel dos Santos Dias Juba Bouaziz Antonio T. Costa Roberto B. Muniz Samir Lounis
author_sort	Filipe S. M. Guimarães
title	Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
title_short	Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
title_full	Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
title_fullStr	Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
title_full_unstemmed	Dynamical amplification of magnetoresistances and Hall currents up to the THz regime
title_sort	dynamical amplification of magnetoresistances and hall currents up to the thz regime
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/5570cecd18d443debd4c3bf85bfe6147
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_version_	1718395516625092608

Dynamical amplification of magnetoresistances and Hall currents up to the THz regime

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