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    Current-induced torques and interfacial spin-orbit coupling

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    PhysRevB.88.214417.pdf
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    1.993Mb
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    Description:
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    Type
    Article
    Authors
    Haney, Paul M.
    Lee, Hyun-Woo
    Lee, Kyung-Jin cc
    Manchon, Aurelien cc
    Stiles, M. D.
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Spintronics Theory Group
    Date
    2013-12-19
    Permanent link to this record
    http://hdl.handle.net/10754/552861
    
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    Abstract
    In bilayer systems consisting of an ultrathin ferromagnetic layer adjacent to a metal with strong spin-orbit coupling, an applied in-plane current induces torques on the magnetization. The torques that arise from spin-orbit coupling are of particular interest. Here we use first-principles methods to calculate the current-induced torque in a Pt-Co bilayer to help determine the underlying mechanism. We focus exclusively on the analog to the Rashba torque, and do not consider the spin Hall effect. The details of the torque depend strongly on the layer thicknesses and the interface structure, providing an explanation for the wide variation in results found by different groups. The torque depends on the magnetization direction in a way similar to that found for a simple Rashba model. Artificially turning off the exchange spin splitting and separately the spin-orbit coupling potential in the Pt shows that the primary source of the “fieldlike” torque is a proximate spin-orbit effect on the Co layer induced by the strong spin-orbit coupling in the Pt.
    Citation
    Current-induced torques and interfacial spin-orbit coupling 2013, 88 (21) Physical Review B
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.88.214417
    arXiv
    1309.1356
    Additional Links
    http://link.aps.org/doi/10.1103/PhysRevB.88.214417
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.88.214417
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Spintronics Theory Group; Material Science and Engineering Program

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