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dc.contributor.authorOrtiz Pauyac, Christian
dc.contributor.authorKalitsov, Alan
dc.contributor.authorManchon, Aurelien
dc.contributor.authorChshiev, Mairbek
dc.date.accessioned2015-03-17T06:10:16Z
dc.date.available2015-03-17T06:10:16Z
dc.date.issued2014-12-08
dc.identifier.citationSpin-transfer torque in spin filter tunnel junctions 2014, 90 (23) Physical Review B
dc.identifier.issn1098-0121
dc.identifier.issn1550-235X
dc.identifier.doi10.1103/PhysRevB.90.235417
dc.identifier.urihttp://hdl.handle.net/10754/346730
dc.description.abstractSpin-transfer torque in a class of magnetic tunnel junctions with noncollinear magnetizations, referred to as spin filter tunnel junctions, is studied within the tight-binding model using the nonequilibrium Green's function technique within Keldysh formalism. These junctions consist of one ferromagnet (FM) adjacent to a magnetic insulator (MI) or two FM separated by a MI. We find that the presence of the magnetic insulator dramatically enhances the magnitude of the spin-torque components compared to conventional magnetic tunnel junctions. The fieldlike torque is driven by the spin-dependent reflection at the MI/FM interface, which results in a small reduction of its amplitude when an insulating spacer (S) is inserted to decouple MI and FM layers. Meanwhile, the dampinglike torque is dominated by the tunneling electrons that experience the lowest barrier height. We propose a device of the form FM/(S)/MI/(S)/FM that takes advantage of these characteristics and allows for tuning the spin-torque magnitudes over a wide range just by rotation of the magnetization of the insulating layer.
dc.publisherAmerican Physical Society (APS)
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.90.235417
dc.rightsArchived with thanks to Physical Review B
dc.titleSpin-transfer torque in spin filter tunnel junctions
dc.typeArticle
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalPhysical Review B
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionSPINTEC, UMR CEA/CNRS/UJF-Grenoble 1/Grenoble-INP, INAC, Grenoble, F-38054, France
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personManchon, Aurelien
kaust.personOrtiz Pauyac, Christian
refterms.dateFOA2018-06-13T16:16:23Z


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