Injection locking at 2f of spin torque oscillators under influence of thermal noise

Abstract Integration of Spin Torque Nano-Oscillators STNO’s in conventional microwave circuits means that the devices have to meet certain specifications. One of the most important criteria is the phase noise, being the key parameter to evaluate the performance and define possible applications. Phas...

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Autores principales:	M. Tortarolo, B. Lacoste, J. Hem, C. Dieudonné, M.-C. Cyrille, J. A. Katine, D. Mauri, A. Zeltser, L. D. Buda-Prejbeanu, U. Ebels
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9393ceacf4864415b0b6f12b34308936
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spelling	oai:doaj.org-article:9393ceacf4864415b0b6f12b343089362021-12-02T15:08:57ZInjection locking at 2f of spin torque oscillators under influence of thermal noise10.1038/s41598-017-18969-52045-2322https://doaj.org/article/9393ceacf4864415b0b6f12b343089362018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-18969-5https://doaj.org/toc/2045-2322Abstract Integration of Spin Torque Nano-Oscillators STNO’s in conventional microwave circuits means that the devices have to meet certain specifications. One of the most important criteria is the phase noise, being the key parameter to evaluate the performance and define possible applications. Phase locking several oscillators together has been suggested as a possible means to decrease phase noise and consequently, the linewidth. In this work we present experiments, numerical simulations and an analytic model to describe the effects of thermal noise in the injection locking of a tunnel junction based STNO. The analytics show the relation of the intrinsic parameters of the STNO with the phase noise level, opening the path to tailor the spectral characteristics by the magnetic configuration. Experiments and simulations demonstrate that in the in-plane magnetized structure, while the frequency is locked, much higher reference currents are needed to reduce the noise by phase locking. Moreover, our analysis shows that it is possible to control the phase noise by the reference microwave current (IRF) and that it can be further reduced by increasing the bias current (IDC) of the oscillator, keeping the reference current in feasible limits for applications.M. TortaroloB. LacosteJ. HemC. DieudonnéM.-C. CyrilleJ. A. KatineD. MauriA. ZeltserL. D. Buda-PrejbeanuU. EbelsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. Tortarolo B. Lacoste J. Hem C. Dieudonné M.-C. Cyrille J. A. Katine D. Mauri A. Zeltser L. D. Buda-Prejbeanu U. Ebels Injection locking at 2f of spin torque oscillators under influence of thermal noise
description	Abstract Integration of Spin Torque Nano-Oscillators STNO’s in conventional microwave circuits means that the devices have to meet certain specifications. One of the most important criteria is the phase noise, being the key parameter to evaluate the performance and define possible applications. Phase locking several oscillators together has been suggested as a possible means to decrease phase noise and consequently, the linewidth. In this work we present experiments, numerical simulations and an analytic model to describe the effects of thermal noise in the injection locking of a tunnel junction based STNO. The analytics show the relation of the intrinsic parameters of the STNO with the phase noise level, opening the path to tailor the spectral characteristics by the magnetic configuration. Experiments and simulations demonstrate that in the in-plane magnetized structure, while the frequency is locked, much higher reference currents are needed to reduce the noise by phase locking. Moreover, our analysis shows that it is possible to control the phase noise by the reference microwave current (IRF) and that it can be further reduced by increasing the bias current (IDC) of the oscillator, keeping the reference current in feasible limits for applications.
format	article
author	M. Tortarolo B. Lacoste J. Hem C. Dieudonné M.-C. Cyrille J. A. Katine D. Mauri A. Zeltser L. D. Buda-Prejbeanu U. Ebels
author_facet	M. Tortarolo B. Lacoste J. Hem C. Dieudonné M.-C. Cyrille J. A. Katine D. Mauri A. Zeltser L. D. Buda-Prejbeanu U. Ebels
author_sort	M. Tortarolo
title	Injection locking at 2f of spin torque oscillators under influence of thermal noise
title_short	Injection locking at 2f of spin torque oscillators under influence of thermal noise
title_full	Injection locking at 2f of spin torque oscillators under influence of thermal noise
title_fullStr	Injection locking at 2f of spin torque oscillators under influence of thermal noise
title_full_unstemmed	Injection locking at 2f of spin torque oscillators under influence of thermal noise
title_sort	injection locking at 2f of spin torque oscillators under influence of thermal noise
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/9393ceacf4864415b0b6f12b34308936
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Injection locking at 2f of spin torque oscillators under influence of thermal noise

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