Phenomenology of chiral damping in noncentrosymmetric magnets

Collins Ashu Akosa, Ioan Mihai Miron, Gilles Gaudin, and Aurélien Manchon
Phys. Rev. B 93, 214429 – Published 21 June 2016
PDFHTMLExport Citation

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.

  • Figure
  • Figure
  • Figure
  • Received 28 July 2015

DOI:https://doi.org/10.1103/PhysRevB.93.214429

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Collins Ashu Akosa1, Ioan Mihai Miron2,3,4, Gilles Gaudin2,3,4, and Aurélien Manchon1,*

  • 1King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division (PSE), Thuwal 23955, Saudi Arabia
  • 2Université Grenoble Alpes, INAC-SPINTEC, F-38000 Grenoble, France
  • 3CNRS INAC-SPINTEC, F-38000 Grenoble, France
  • 4CEA INAC-SPINTEC, F-38000 Grenoble, France

  • *aurelien.manchon@kaust.edu.sa

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 93, Iss. 21 — 1 June 2016

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×