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    Phenomenology of chiral damping in noncentrosymmetric magnets

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    PhysRevB.93.214429.pdf
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    Type
    Article
    Authors
    Akosa, Collins Ashu cc
    Miron, Ioan Mihai
    Gaudin, Gilles
    Manchon, Aurelien cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Spintronics Theory Group
    KAUST Grant Number
    OSR-CRG URF/1/1693-01
    Date
    2016-06-21
    Permanent link to this record
    http://hdl.handle.net/10754/617305
    
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    Abstract
    A phenomenology of magnetic chiral damping is proposed in the context of magnetic materials lacking inversion symmetry. We show that the magnetic damping tensor acquires a component linear in magnetization gradient in the form of Lifshitz invariants. We propose different microscopic mechanisms that can produce such a damping in ferromagnetic metals, among which local spin pumping in the presence of an anomalous Hall effect and an effective “s-d” Dzyaloshinskii-Moriya antisymmetric exchange. The implication of this chiral damping in terms of domain-wall motion is investigated in the flow and creep regimes.
    Citation
    Phenomenology of chiral damping in noncentrosymmetric magnets 2016, 93 (21) Physical Review B
    Sponsors
    This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) through Award No. OSR-CRG URF/1/1693-01 from the Office of Sponsored Research (OSR).
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.93.214429
    arXiv
    1507.07762
    Additional Links
    http://link.aps.org/doi/10.1103/PhysRevB.93.214429
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.93.214429
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Spintronics Theory Group; Material Science and Engineering Program

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