Enhancement of spin Hall effect induced torques for current-driven magnetic domain wall motion: Inner interface effect

Handle URI:
http://hdl.handle.net/10754/611200
Title:
Enhancement of spin Hall effect induced torques for current-driven magnetic domain wall motion: Inner interface effect
Authors:
Bang, Do; Yu, Jiawei; Qiu, Xuepeng; Wang, Yi; Awano, Hiroyuki; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Yang, Hyunsoo
Abstract:
We investigate the current-induced domain wall motion in perpendicular magnetized Tb/Co wires with structure inversion asymmetry and different layered structures. We find that the critical current density to drive domain wall motion strongly depends on the layered structure. The lowest critical current density ∼15MA/cm2 and the highest slope of domain wall velocity curve are obtained for the wire having thin Co sublayers and more inner Tb/Co interfaces, while the largest critical current density ∼26MA/cm2 required to drive domain walls is observed in the Tb-Co alloy magnetic wire. It is found that the Co/Tb interface contributes negligibly to Dzyaloshinskii-Moriya interaction, while the effective spin-orbit torque strongly depends on the number of Tb/Co inner interfaces (n). An enhancement of the antidamping torques by extrinsic spin Hall effect due to Tb rare-earth impurity-induced skew scattering is suggested to explain the high efficiency of current-induced domain wall motion.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Enhancement of spin Hall effect induced torques for current-driven magnetic domain wall motion: Inner interface effect 2016, 93 (17) Physical Review B
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
23-May-2016
DOI:
10.1103/PhysRevB.93.174424
Type:
Article
ISSN:
2469-9950; 2469-9969
Sponsors:
This work was partially supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan - Supported Program for Strategic Research Foundation at Private University (2014–2020) and KAKENHI No. 26630137, and the National Research Foundation (NRF), Prime Minister's Office, Singapore, under its Competitive Research Programme (CRP Award No. NRFCRP12-2013-01). H.Y. thanks the Singapore Spintronics Consortium (SG-SPIN) for support. A.M. acknowledges support from the King Abdullah University of Science and Technology (KAUST).
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.93.174424
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBang, Doen
dc.contributor.authorYu, Jiaweien
dc.contributor.authorQiu, Xuepengen
dc.contributor.authorWang, Yien
dc.contributor.authorAwano, Hiroyukien
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorYang, Hyunsooen
dc.date.accessioned2016-05-30T13:28:27Z-
dc.date.available2016-05-30T13:28:27Z-
dc.date.issued2016-05-23-
dc.identifier.citationEnhancement of spin Hall effect induced torques for current-driven magnetic domain wall motion: Inner interface effect 2016, 93 (17) Physical Review Ben
dc.identifier.issn2469-9950-
dc.identifier.issn2469-9969-
dc.identifier.doi10.1103/PhysRevB.93.174424-
dc.identifier.urihttp://hdl.handle.net/10754/611200-
dc.description.abstractWe investigate the current-induced domain wall motion in perpendicular magnetized Tb/Co wires with structure inversion asymmetry and different layered structures. We find that the critical current density to drive domain wall motion strongly depends on the layered structure. The lowest critical current density ∼15MA/cm2 and the highest slope of domain wall velocity curve are obtained for the wire having thin Co sublayers and more inner Tb/Co interfaces, while the largest critical current density ∼26MA/cm2 required to drive domain walls is observed in the Tb-Co alloy magnetic wire. It is found that the Co/Tb interface contributes negligibly to Dzyaloshinskii-Moriya interaction, while the effective spin-orbit torque strongly depends on the number of Tb/Co inner interfaces (n). An enhancement of the antidamping torques by extrinsic spin Hall effect due to Tb rare-earth impurity-induced skew scattering is suggested to explain the high efficiency of current-induced domain wall motion.en
dc.description.sponsorshipThis work was partially supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan - Supported Program for Strategic Research Foundation at Private University (2014–2020) and KAKENHI No. 26630137, and the National Research Foundation (NRF), Prime Minister's Office, Singapore, under its Competitive Research Programme (CRP Award No. NRFCRP12-2013-01). H.Y. thanks the Singapore Spintronics Consortium (SG-SPIN) for support. A.M. acknowledges support from the King Abdullah University of Science and Technology (KAUST).en
dc.language.isoenen
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.93.174424en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleEnhancement of spin Hall effect induced torques for current-driven magnetic domain wall motion: Inner interface effecten
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionToyota Technological Institute, Tempaku, Nagoya 468-8511, Japanen
dc.contributor.institutionInstitute of Material Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnamen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, National University of Singapore, 117576, Singaporeen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorManchon, Aurelienen
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