Spin transfer torque in antiferromagnetic spin valves: From clean to disordered regimes

Handle URI:
http://hdl.handle.net/10754/552794
Title:
Spin transfer torque in antiferromagnetic spin valves: From clean to disordered regimes
Authors:
Saidaoui, Hamed Ben Mohamed ( 0000-0003-3110-0912 ) ; Manchon, Aurelien ( 0000-0002-4768-293X ) ; Waintal, Xavier
Abstract:
Current-driven spin torques in metallic spin valves composed of antiferromagnets are theoretically studied using the nonequilibrium Green's function method implemented on a tight-binding model. We focus our attention on G-type and L-type antiferromagnets in both clean and disordered regimes. In such structures, spin torques can either rotate the magnetic order parameter coherently (coherent torque) or compete with the internal antiferromagnetic exchange (exchange torque). We show that, depending on the symmetry of the spin valve, the coherent and exchange torques can either be in the plane, ∝n×(q×n) or out of the plane ∝n×q, where q and n are the directions of the order parameter of the polarizer and the free antiferromagnetic layers, respectively. Although disorder conserves the symmetry of the torques, it strongly reduces the torque magnitude, pointing out the need for momentum conservation to ensure strong spin torque in antiferromagnetic spin valves.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Spin transfer torque in antiferromagnetic spin valves: From clean to disordered regimes 2014, 89 (17) Physical Review B
Publisher:
American Physical Society (APS)
Journal:
Physical Review B
Issue Date:
28-May-2014
DOI:
10.1103/PhysRevB.89.174430
ARXIV:
arXiv:1403.6383
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.89.174430; http://arxiv.org/abs/1403.6383
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorSaidaoui, Hamed Ben Mohameden
dc.contributor.authorManchon, Aurelienen
dc.contributor.authorWaintal, Xavieren
dc.date.accessioned2015-05-14T08:28:01Zen
dc.date.available2015-05-14T08:28:01Zen
dc.date.issued2014-05-28en
dc.identifier.citationSpin transfer torque in antiferromagnetic spin valves: From clean to disordered regimes 2014, 89 (17) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.89.174430en
dc.identifier.urihttp://hdl.handle.net/10754/552794en
dc.description.abstractCurrent-driven spin torques in metallic spin valves composed of antiferromagnets are theoretically studied using the nonequilibrium Green's function method implemented on a tight-binding model. We focus our attention on G-type and L-type antiferromagnets in both clean and disordered regimes. In such structures, spin torques can either rotate the magnetic order parameter coherently (coherent torque) or compete with the internal antiferromagnetic exchange (exchange torque). We show that, depending on the symmetry of the spin valve, the coherent and exchange torques can either be in the plane, ∝n×(q×n) or out of the plane ∝n×q, where q and n are the directions of the order parameter of the polarizer and the free antiferromagnetic layers, respectively. Although disorder conserves the symmetry of the torques, it strongly reduces the torque magnitude, pointing out the need for momentum conservation to ensure strong spin torque in antiferromagnetic spin valves.en
dc.publisherAmerican Physical Society (APS)en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.89.174430en
dc.relation.urlhttp://arxiv.org/abs/1403.6383en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleSpin transfer torque in antiferromagnetic spin valves: From clean to disordered regimesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCEA-INAC/UJF Grenoble 1, SPSMS UMR-E 9001, Grenoble F-38054, Franceen
dc.identifier.arxividarXiv:1403.6383en
kaust.authorManchon, Aurelienen
kaust.authorSaidaoui, Hamed Ben Mohameden
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