Gutenberg Open Science: Identifying the origin of the nonmonotonic thickness dependence of spin-orbit torque and interfacial Dzyaloshinskii-Moriya interaction in a ferrimagnetic insulator heterostructure

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-5265

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DC Field	Value	Language
dc.contributor.author	Ding, Shilei	-
dc.contributor.author	Baldrati, Lorenzo	-
dc.contributor.author	Ross, Andrew	-
dc.contributor.author	Ren, Zengyao	-
dc.contributor.author	Wu, Rui	-
dc.contributor.author	Becker, Sven	-
dc.contributor.author	Yang, Jinbo	-
dc.contributor.author	Jakob, Gerhard	-
dc.contributor.author	Brataas, Arne	-
dc.contributor.author	Kläui, Mathias	-
dc.date.accessioned	2020-11-04T09:45:04Z	-
dc.date.available	2020-11-04T09:45:04Z	-
dc.date.issued	2020	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/5269	-
dc.description.abstract	Electrical manipulation of magnetism via spin-orbit torques (SOTs) promises efficient spintronic devices. In systems comprising magnetic insulators and heavy metals, SOTs have started to be investigated only recently, especially in systems with interfacial Dzyaloshinskii-Moriya interaction (iDMI). Here, we quantitatively study the SOT efficiency and iDMI in a series of gadolinium gallium garnet (GGG)/thulium iron garnet (TmIG)/platinum (Pt) heterostructures with varying TmIG and Pt thicknesses. We find that the nonmonotonic SOT efficiency as a function of the magnetic layer thickness is not consistent with the 1/thickness dependence expected from a simple interfacial SOT mechanism. Moreover, considering the insulating nature of TmIG, our results cannot be explained by the SOT mechanism established for metallic magnets where the transverse charge spin current can inject and dephase in the magnetic layers. Rather we can explain this nonmonotonic behavior by a model based on the interfacial spin mixing conductance that is affected by the thickness-dependent exchange splitting energy by determining the phase difference of the reflected spin-up and spin-down electrons at the TmIG/Pt interface. By studying the Pt thickness dependence, we find that the effective DMI for GGG/TmIG/Pt does not depend on the Pt thickness, which indicates that the GGG/TmIG interface is the source of the iDMI in this system. Our work demonstrates that SOT and DMI can originate from two different interfaces, which enables independent optimization of DMI and SOT for advanced chiral spintronics with low damping magnetic insulators.	en_GB
dc.language.iso	eng	de
dc.rights	InCopyright	*
dc.rights.uri	https://rightsstatements.org/vocab/InC/1.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	Identifying the origin of the nonmonotonic thickness dependence of spin-orbit torque and interfacial Dzyaloshinskii-Moriya interaction in a ferrimagnetic insulator heterostructure	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-5265	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Accepted 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	Physical review : B	de
jgu.journal.volume	102	de
jgu.journal.issue	5	de
jgu.pages.alternative	Art. 054425	de
jgu.publisher.year	2020	-
jgu.publisher.name	APS	de
jgu.publisher.place	Ridge, NY	de
jgu.publisher.uri	https://doi.org/10.1103/PhysRevB.102.054425	de
jgu.publisher.issn	2469-9950	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1103/PhysRevB.102.054425
jgu.organisation.ror	https://ror.org/023b0x485
Appears in collections:	JGU-Publikationen

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