Gutenberg Open Science: Tuning spin-orbit torques across the phase transition in VO2/NiFe heterostructure

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-7331

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DC Field	Value	Language
dc.contributor.author	Kim, Jun-young	-
dc.contributor.author	Cramer, Joel	-
dc.contributor.author	Lee, Kyujoon	-
dc.contributor.author	Han, Dong-Soo	-
dc.contributor.author	Go, Dongwook	-
dc.contributor.author	Salev, Pavel	-
dc.contributor.author	Lapa, Pavel N.	-
dc.contributor.author	Vargas, Nicolas M.	-
dc.contributor.author	Schuller, Ivan K.	-
dc.contributor.author	Mokrousov, Yuriy	-
dc.contributor.author	Jakob, Gerhard	-
dc.contributor.author	Kläui, Mathias	-
dc.date.accessioned	2022-08-01T07:52:35Z	-
dc.date.available	2022-08-01T07:52:35Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/7345	-
dc.description.abstract	The emergence of spin-orbit torques as a promising approach to energy-efficient magnetic switching has generated large interest in material systems with easily and fully tunable spin-orbit torques. Here, current-induced spin-orbit torques in VO2/NiFe heterostructures are investigated using spin-torque ferromagnetic resonance, where the VO2 layer undergoes a prominent insulator-metal transition. A roughly twofold increase in the Gilbert damping parameter, alpha, with temperature is attributed to the change in the VO2/NiFe interface spin absorption across the VO2 phase transition. More remarkably, a large modulation (+/- 100%) and a sign change of the current-induced spin-orbit torque across the VO2 phase transition suggest two competing spin-orbit torque generating mechanisms. The bulk spin Hall effect in metallic VO2, corroborated by the first-principles calculation of the spin Hall conductivity sigma SH approximate to-104PLANCK CONSTANT OVER TWO PIe omega-1 m-1, is verified as the main source of the spin-orbit torque in the metallic phase. The self-induced/anomalous torque in NiFe, with opposite sign and a similar magnitude to the bulk spin Hall effect in metallic VO2, can be the other competing mechanism that dominates as temperature decreases. For applications, the strong tunability of the torque strength and direction opens a new route to tailor spin-orbit torques of materials that undergo phase transitions for new device functionalities.	en_GB
dc.description.sponsorship	Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 491381577	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	Tuning spin-orbit torques across the phase transition in VO2/NiFe heterostructure	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-7331	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 08 Physik, Mathematik u. Informatik	de
jgu.organisation.number	7940	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Advanced functional materials	de
jgu.journal.volume	32	de
jgu.journal.issue	17	de
jgu.pages.alternative	2111555	de
jgu.publisher.year	2022	-
jgu.publisher.name	Wiley-VCH	de
jgu.publisher.place	Weinheim	de
jgu.publisher.issn	1616-301X	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1002/adfm.202111555	de
jgu.organisation.ror	https://ror.org/023b0x485	-
Appears in collections:	DFG-491381577-H

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