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    Current induced torques and interfacial spin-orbit coupling: Semiclassical modeling

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    PhysRevB.87.174411.pdf
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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
    Core Labs
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Spintronics Theory Group
    Date
    2013-05-07
    Preprint Posting Date
    2013-01-18
    Permanent link to this record
    http://hdl.handle.net/10754/552865
    
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    Abstract
    In bilayer nanowires consisting of a ferromagnetic layer and a nonmagnetic layer with strong spin-orbit coupling, currents create torques on the magnetization beyond those found in simple ferromagnetic nanowires. The resulting magnetic dynamics appear to require torques that can be separated into two terms, dampinglike and fieldlike. The dampinglike torque is typically derived from models describing the bulk spin Hall effect and the spin transfer torque, and the fieldlike torque is typically derived from a Rashba model describing interfacial spin-orbit coupling. We derive a model based on the Boltzmann equation that unifies these approaches. We also consider an approximation to the Boltzmann equation, the drift-diffusion model, that qualitatively reproduces the behavior, but quantitatively differs in some regimes. We show that the Boltzmann equation with physically reasonable parameters can match the torques for any particular sample, but in some cases, it fails to describe the experimentally observed thickness dependencies.
    Citation
    Current induced torques and interfacial spin-orbit coupling: Semiclassical modeling 2013, 87 (17) Physical Review B
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.87.174411
    arXiv
    1301.4513
    Additional Links
    http://link.aps.org/doi/10.1103/PhysRevB.87.174411
    http://arxiv.org/abs/1301.4513
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.87.174411
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Spintronics Theory Group; Material Science and Engineering Program

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