Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

Abstract Electrical spin switching in an antiferromagnet is one of the key issues for both academic interest and industrial demand in new-type spin devices because an antiferromagnetic system has a negligible stray field due to an alternating sign between sub-lattices, in contrast to a ferromagnetic...

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Autores principales:	Tae Heon Kim, Peter Grüenberg, S. H. Han, B. K. Cho
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/20ef4ef289264c578fa7bfb962a9db7b
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spelling	oai:doaj.org-article:20ef4ef289264c578fa7bfb962a9db7b2021-12-02T12:32:56ZField-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO310.1038/s41598-017-04883-32045-2322https://doaj.org/article/20ef4ef289264c578fa7bfb962a9db7b2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04883-3https://doaj.org/toc/2045-2322Abstract Electrical spin switching in an antiferromagnet is one of the key issues for both academic interest and industrial demand in new-type spin devices because an antiferromagnetic system has a negligible stray field due to an alternating sign between sub-lattices, in contrast to a ferromagnetic system. Naturally, questions arise regarding how fast and, simultaneously, how robustly the magnetization can be switched by external stimuli, e.g., magnetic field and spin current. First, the exploitation of ultrafast precessional motion of magnetization in antiferromagnetic oxide has been studied intensively. Regarding robustness, the so-called inertia-driven switching scenario has been generally accepted as the switching mechanism in antiferromagnet system. However, in order to understand the switching dynamics in a canted antiferromagnet, excited by magnetic field, accurate equation of motion and corresponding interpretation are necessary. Here, we re-investigate the inertia-driven switching process, triggered by the strict phase matching between effective driving field, dh/dt, and antiferromagnetic order parameters, l. Such theoretical approaches make it possible to observe the static parameters of an antiferromagnet, hosting Dzyaloshinskii–Moriya (DM) interaction. Indeed, we estimate successfully static parameters, such as DM, exchange, and anisotropy energies, from dynamical behaviour in YFeO3, studied using terahertz time-domain spectroscopy.Tae Heon KimPeter GrüenbergS. H. HanB. K. ChoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tae Heon Kim Peter Grüenberg S. H. Han B. K. Cho Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3
description	Abstract Electrical spin switching in an antiferromagnet is one of the key issues for both academic interest and industrial demand in new-type spin devices because an antiferromagnetic system has a negligible stray field due to an alternating sign between sub-lattices, in contrast to a ferromagnetic system. Naturally, questions arise regarding how fast and, simultaneously, how robustly the magnetization can be switched by external stimuli, e.g., magnetic field and spin current. First, the exploitation of ultrafast precessional motion of magnetization in antiferromagnetic oxide has been studied intensively. Regarding robustness, the so-called inertia-driven switching scenario has been generally accepted as the switching mechanism in antiferromagnet system. However, in order to understand the switching dynamics in a canted antiferromagnet, excited by magnetic field, accurate equation of motion and corresponding interpretation are necessary. Here, we re-investigate the inertia-driven switching process, triggered by the strict phase matching between effective driving field, dh/dt, and antiferromagnetic order parameters, l. Such theoretical approaches make it possible to observe the static parameters of an antiferromagnet, hosting Dzyaloshinskii–Moriya (DM) interaction. Indeed, we estimate successfully static parameters, such as DM, exchange, and anisotropy energies, from dynamical behaviour in YFeO3, studied using terahertz time-domain spectroscopy.
format	article
author	Tae Heon Kim Peter Grüenberg S. H. Han B. K. Cho
author_facet	Tae Heon Kim Peter Grüenberg S. H. Han B. K. Cho
author_sort	Tae Heon Kim
title	Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3
title_short	Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3
title_full	Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3
title_fullStr	Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3
title_full_unstemmed	Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3
title_sort	field-driven dynamics and time-resolved measurement of dzyaloshinskii-moriya torque in canted antiferromagnet yfeo3
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/20ef4ef289264c578fa7bfb962a9db7b
work_keys_str_mv	AT taeheonkim fielddrivendynamicsandtimeresolvedmeasurementofdzyaloshinskiimoriyatorqueincantedantiferromagnetyfeo3 AT petergruenberg fielddrivendynamicsandtimeresolvedmeasurementofdzyaloshinskiimoriyatorqueincantedantiferromagnetyfeo3 AT shhan fielddrivendynamicsandtimeresolvedmeasurementofdzyaloshinskiimoriyatorqueincantedantiferromagnetyfeo3 AT bkcho fielddrivendynamicsandtimeresolvedmeasurementofdzyaloshinskiimoriyatorqueincantedantiferromagnetyfeo3
_version_	1718393905728192512

Field-driven dynamics and time-resolved measurement of Dzyaloshinskii-Moriya torque in canted antiferromagnet YFeO3

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