All-optical spin switching probability in [Tb/Co] multilayers

Abstract Since the first experimental observation of all-optical switching phenomena, intensive research has been focused on finding suitable magnetic systems that can be integrated as storage elements within spintronic devices and whose magnetization can be controlled through ultra-short single las...

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Autores principales:	L. Avilés-Félix, L. Farcis, Z. Jin, L. Álvaro-Gómez, G. Li, K. T. Yamada, A. Kirilyuk, A. V. Kimel, Th. Rasing, B. Dieny, R. C. Sousa, I. L. Prejbeanu, L. D. Buda-Prejbeanu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4271fec0b98843f89e0532cbc5ff0d3e
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spelling	oai:doaj.org-article:4271fec0b98843f89e0532cbc5ff0d3e2021-12-02T13:24:25ZAll-optical spin switching probability in [Tb/Co] multilayers10.1038/s41598-021-86065-w2045-2322https://doaj.org/article/4271fec0b98843f89e0532cbc5ff0d3e2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86065-whttps://doaj.org/toc/2045-2322Abstract Since the first experimental observation of all-optical switching phenomena, intensive research has been focused on finding suitable magnetic systems that can be integrated as storage elements within spintronic devices and whose magnetization can be controlled through ultra-short single laser pulses. We report here atomistic spin simulations of all-optical switching in multilayered structures alternating n monolayers of Tb and m monolayers of Co. By using a two temperature model, we numerically calculate the thermal variation of the magnetization of each sublattice as well as the magnetization dynamics of [ $$\text {Tb}_n$$ Tb n / $$\text {Co}_m$$ Co m ] multilayers upon incidence of a single laser pulse. In particular, the condition to observe thermally-induced magnetization switching is investigated upon varying systematically both the composition of the sample (n,m) and the laser fluence. The samples with one monolayer of Tb as [ $$\text {Tb}_1$$ Tb 1 / $$\text {Co}_2$$ Co 2 ] and [ $$\text {Tb}_1$$ Tb 1 / $$\text {Co}_3$$ Co 3 ] are showing thermally induced magnetization switching above a fluence threshold. The reversal mechanism is mediated by the residual magnetization of the Tb lattice while the Co is fully demagnetized in agreement with the models developed for ferrimagnetic alloys. The switching is however not fully deterministic but the error rate can be tuned by the damping parameter. Increasing the number of monolayers the switching becomes completely stochastic. The intermixing at the Tb/Co interfaces appears to be a promising way to reduce the stochasticity. These results predict for the first time the possibility of TIMS in [Tb/Co] multilayers and suggest the occurrence of sub-picosecond magnetization reversal using single laser pulses.L. Avilés-FélixL. FarcisZ. JinL. Álvaro-GómezG. LiK. T. YamadaA. KirilyukA. V. KimelTh. RasingB. DienyR. C. SousaI. L. PrejbeanuL. D. Buda-PrejbeanuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q L. Avilés-Félix L. Farcis Z. Jin L. Álvaro-Gómez G. Li K. T. Yamada A. Kirilyuk A. V. Kimel Th. Rasing B. Dieny R. C. Sousa I. L. Prejbeanu L. D. Buda-Prejbeanu All-optical spin switching probability in [Tb/Co] multilayers
description	Abstract Since the first experimental observation of all-optical switching phenomena, intensive research has been focused on finding suitable magnetic systems that can be integrated as storage elements within spintronic devices and whose magnetization can be controlled through ultra-short single laser pulses. We report here atomistic spin simulations of all-optical switching in multilayered structures alternating n monolayers of Tb and m monolayers of Co. By using a two temperature model, we numerically calculate the thermal variation of the magnetization of each sublattice as well as the magnetization dynamics of [ $$\text {Tb}_n$$ Tb n / $$\text {Co}_m$$ Co m ] multilayers upon incidence of a single laser pulse. In particular, the condition to observe thermally-induced magnetization switching is investigated upon varying systematically both the composition of the sample (n,m) and the laser fluence. The samples with one monolayer of Tb as [ $$\text {Tb}_1$$ Tb 1 / $$\text {Co}_2$$ Co 2 ] and [ $$\text {Tb}_1$$ Tb 1 / $$\text {Co}_3$$ Co 3 ] are showing thermally induced magnetization switching above a fluence threshold. The reversal mechanism is mediated by the residual magnetization of the Tb lattice while the Co is fully demagnetized in agreement with the models developed for ferrimagnetic alloys. The switching is however not fully deterministic but the error rate can be tuned by the damping parameter. Increasing the number of monolayers the switching becomes completely stochastic. The intermixing at the Tb/Co interfaces appears to be a promising way to reduce the stochasticity. These results predict for the first time the possibility of TIMS in [Tb/Co] multilayers and suggest the occurrence of sub-picosecond magnetization reversal using single laser pulses.
format	article
author	L. Avilés-Félix L. Farcis Z. Jin L. Álvaro-Gómez G. Li K. T. Yamada A. Kirilyuk A. V. Kimel Th. Rasing B. Dieny R. C. Sousa I. L. Prejbeanu L. D. Buda-Prejbeanu
author_facet	L. Avilés-Félix L. Farcis Z. Jin L. Álvaro-Gómez G. Li K. T. Yamada A. Kirilyuk A. V. Kimel Th. Rasing B. Dieny R. C. Sousa I. L. Prejbeanu L. D. Buda-Prejbeanu
author_sort	L. Avilés-Félix
title	All-optical spin switching probability in [Tb/Co] multilayers
title_short	All-optical spin switching probability in [Tb/Co] multilayers
title_full	All-optical spin switching probability in [Tb/Co] multilayers
title_fullStr	All-optical spin switching probability in [Tb/Co] multilayers
title_full_unstemmed	All-optical spin switching probability in [Tb/Co] multilayers
title_sort	all-optical spin switching probability in [tb/co] multilayers
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4271fec0b98843f89e0532cbc5ff0d3e
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_version_	1718393090123759616

All-optical spin switching probability in [Tb/Co] multilayers

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