Dynamics of domain-wall motion driven by spin-orbit torque in antiferromagnets

Luis Sánchez-Tejerina, Vito Puliafito, Pedram Khalili Amiri, Mario Carpentieri, Giovanni Finocchio

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The excitation of ultrafast dynamics in antiferromagnetic materials is an appealing feature for the realization of spintronic devices. Several experiments have shown that static and dynamic behaviors of the antiferromagnetic order are strictly related to the stabilization of multidomain states and the manipulation of their domain walls (DWs). Hence, a full micromagnetic framework should be used as a comprehensive theoretical tool for a quantitative understanding of those experimental findings. This model is used to perform numerical experiments to study the antiferromagnetic DW motion driven by the spin-orbit torque. We have derived simplified expressions for the DW width and velocity that exhibit a very good agreement with the numerical calculations in a wide range of parameters. Additionally, we have found that a mechanism limiting the maximum applicable current in an antiferromagnetic racetrack memory is the continuous domain nucleation from its edges, which is qualitatively different from what observed in the ferromagnetic case.

Original languageEnglish (US)
Article number014433
JournalPhysical Review B
Volume101
Issue number1
DOIs
StatePublished - Jan 22 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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