Non-volatile artificial synapse based on a vortex nano-oscillator

Abstract In this work, a new mechanism to combine a non-volatile behaviour with the spin diode detection of a vortex-based spin torque nano-oscillator (STVO) is presented. Experimentally, it is observed that the spin diode response of the oscillator depends on the vortex chirality. Consequently, fix...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Leandro Martins, Alex S. Jenkins, Lara San Emeterio Alvarez, Jérôme Borme, Tim Böhnert, João Ventura, Paulo P. Freitas, Ricardo Ferreira
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6b80e6ba5b214b029eb545fdb5d1f032
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6b80e6ba5b214b029eb545fdb5d1f032
record_format	dspace
spelling	oai:doaj.org-article:6b80e6ba5b214b029eb545fdb5d1f0322021-12-02T19:06:38ZNon-volatile artificial synapse based on a vortex nano-oscillator10.1038/s41598-021-95569-42045-2322https://doaj.org/article/6b80e6ba5b214b029eb545fdb5d1f0322021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95569-4https://doaj.org/toc/2045-2322Abstract In this work, a new mechanism to combine a non-volatile behaviour with the spin diode detection of a vortex-based spin torque nano-oscillator (STVO) is presented. Experimentally, it is observed that the spin diode response of the oscillator depends on the vortex chirality. Consequently, fixing the frequency of the incoming signal and switching the vortex chirality results in a different rectified voltage. In this way, the chirality can be deterministically controlled via the application of electrical signals injected locally in the device, resulting in a non-volatile control of the output voltage for a given input frequency. Micromagnetic simulations corroborate the experimental results and show the main contribution of the Oersted field created by the input RF current density in defining two distinct spin diode detections for different chiralities. By using two non-identical STVOs, we show how these devices can be used as programmable non-volatile synapses in artificial neural networks.Leandro MartinsAlex S. JenkinsLara San Emeterio AlvarezJérôme BormeTim BöhnertJoão VenturaPaulo P. FreitasRicardo FerreiraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Leandro Martins Alex S. Jenkins Lara San Emeterio Alvarez Jérôme Borme Tim Böhnert João Ventura Paulo P. Freitas Ricardo Ferreira Non-volatile artificial synapse based on a vortex nano-oscillator
description	Abstract In this work, a new mechanism to combine a non-volatile behaviour with the spin diode detection of a vortex-based spin torque nano-oscillator (STVO) is presented. Experimentally, it is observed that the spin diode response of the oscillator depends on the vortex chirality. Consequently, fixing the frequency of the incoming signal and switching the vortex chirality results in a different rectified voltage. In this way, the chirality can be deterministically controlled via the application of electrical signals injected locally in the device, resulting in a non-volatile control of the output voltage for a given input frequency. Micromagnetic simulations corroborate the experimental results and show the main contribution of the Oersted field created by the input RF current density in defining two distinct spin diode detections for different chiralities. By using two non-identical STVOs, we show how these devices can be used as programmable non-volatile synapses in artificial neural networks.
format	article
author	Leandro Martins Alex S. Jenkins Lara San Emeterio Alvarez Jérôme Borme Tim Böhnert João Ventura Paulo P. Freitas Ricardo Ferreira
author_facet	Leandro Martins Alex S. Jenkins Lara San Emeterio Alvarez Jérôme Borme Tim Böhnert João Ventura Paulo P. Freitas Ricardo Ferreira
author_sort	Leandro Martins
title	Non-volatile artificial synapse based on a vortex nano-oscillator
title_short	Non-volatile artificial synapse based on a vortex nano-oscillator
title_full	Non-volatile artificial synapse based on a vortex nano-oscillator
title_fullStr	Non-volatile artificial synapse based on a vortex nano-oscillator
title_full_unstemmed	Non-volatile artificial synapse based on a vortex nano-oscillator
title_sort	non-volatile artificial synapse based on a vortex nano-oscillator
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6b80e6ba5b214b029eb545fdb5d1f032
work_keys_str_mv	AT leandromartins nonvolatileartificialsynapsebasedonavortexnanooscillator AT alexsjenkins nonvolatileartificialsynapsebasedonavortexnanooscillator AT larasanemeterioalvarez nonvolatileartificialsynapsebasedonavortexnanooscillator AT jeromeborme nonvolatileartificialsynapsebasedonavortexnanooscillator AT timbohnert nonvolatileartificialsynapsebasedonavortexnanooscillator AT joaoventura nonvolatileartificialsynapsebasedonavortexnanooscillator AT paulopfreitas nonvolatileartificialsynapsebasedonavortexnanooscillator AT ricardoferreira nonvolatileartificialsynapsebasedonavortexnanooscillator
_version_	1718377155285483520

Non-volatile artificial synapse based on a vortex nano-oscillator

Ejemplares similares