Enhanced Spin-Orbit Torque via Modulation of Spin Current Absorption

Handle URI:
http://hdl.handle.net/10754/621917
Title:
Enhanced Spin-Orbit Torque via Modulation of Spin Current Absorption
Authors:
Qiu, Xuepeng; Legrand, William; He, Pan; Wu, Yang; Yu, Jiawei; Ramaswamy, Rajagopalan; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Yang, Hyunsoo
Abstract:
The magnitude of spin-orbit torque (SOT), exerted to a ferromagnet (FM) from an adjacent heavy metal (HM), strongly depends on the amount of spin current absorbed in the FM. We exploit the large spin absorption at the Ru interface to manipulate the SOTs in HM/FM/Ru multilayers. While the FM thickness is smaller than its spin dephasing length of 1.2 nm, the top Ru layer largely boosts the absorption of spin currents into the FM layer and substantially enhances the strength of SOT acting on the FM. Spin-pumping experiments induced by ferromagnetic resonance support our conclusions that the observed increase in the SOT efficiency can be attributed to an enhancement of the spin-current absorption. A theoretical model that considers both reflected and transmitted mixing conductances at the two interfaces of FM is developed to explain the results.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Qiu X, Legrand W, He P, Wu Y, Yu J, et al. (2016) Enhanced Spin-Orbit Torque via Modulation of Spin Current Absorption. Physical Review Letters 117. Available: http://dx.doi.org/10.1103/PhysRevLett.117.217206.
Publisher:
American Physical Society (APS)
Journal:
Physical Review Letters
Issue Date:
18-Nov-2016
DOI:
10.1103/PhysRevLett.117.217206
Type:
Article
ISSN:
0031-9007; 1079-7114
Sponsors:
This research is supported by the National Research Foundation (NRF), Prime Minister’s Office, Singapore, under its Competitive Research Programme (CRP Award No. NRFCRP12-2013-01). H. Y. is a member of the Singapore Spintronics Consortium (SG-SPIN). A. M. acknowledges support from King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.217206
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorQiu, Xuepengen
dc.contributor.authorLegrand, Williamen
dc.contributor.authorHe, Panen
dc.contributor.authorWu, Yangen
dc.contributor.authorYu, Jiaweien
dc.contributor.authorRamaswamy, Rajagopalanen
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorYang, Hyunsooen
dc.date.accessioned2016-12-01T14:12:43Z-
dc.date.available2016-12-01T14:12:43Z-
dc.date.issued2016-11-18en
dc.identifier.citationQiu X, Legrand W, He P, Wu Y, Yu J, et al. (2016) Enhanced Spin-Orbit Torque via Modulation of Spin Current Absorption. Physical Review Letters 117. Available: http://dx.doi.org/10.1103/PhysRevLett.117.217206.en
dc.identifier.issn0031-9007en
dc.identifier.issn1079-7114en
dc.identifier.doi10.1103/PhysRevLett.117.217206en
dc.identifier.urihttp://hdl.handle.net/10754/621917-
dc.description.abstractThe magnitude of spin-orbit torque (SOT), exerted to a ferromagnet (FM) from an adjacent heavy metal (HM), strongly depends on the amount of spin current absorbed in the FM. We exploit the large spin absorption at the Ru interface to manipulate the SOTs in HM/FM/Ru multilayers. While the FM thickness is smaller than its spin dephasing length of 1.2 nm, the top Ru layer largely boosts the absorption of spin currents into the FM layer and substantially enhances the strength of SOT acting on the FM. Spin-pumping experiments induced by ferromagnetic resonance support our conclusions that the observed increase in the SOT efficiency can be attributed to an enhancement of the spin-current absorption. A theoretical model that considers both reflected and transmitted mixing conductances at the two interfaces of FM is developed to explain the results.en
dc.description.sponsorshipThis research is supported by the National Research Foundation (NRF), Prime Minister’s Office, Singapore, under its Competitive Research Programme (CRP Award No. NRFCRP12-2013-01). H. Y. is a member of the Singapore Spintronics Consortium (SG-SPIN). A. M. acknowledges support from King Abdullah University of Science and Technology (KAUST).en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.217206en
dc.rightsArchived with thanks to Physical Review Lettersen
dc.titleEnhanced Spin-Orbit Torque via Modulation of Spin Current Absorptionen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, and NUSNNI, National University of Singapore, Singapore 117576, Singaporeen
dc.contributor.institutionShanghai Key Laboratory of Special Artificial Microstructure Materials & School of Physics Science and Engineering, Tongji University, Shanghai 200092, Chinaen
kaust.authorManchon, Aurelienen
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