Topologically protected dynamics of spin textures

O. A. Tretiakov, Ar Abanov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We study current-induced dynamics of spin textures in thin magnetic nanowires. We derive effective equations of motion describing the dynamics of the domain-wall soft modes associated with topological defects. Because the magnetic domain walls are topological objects, these equations are universal and depend only on a few parameters. We obtain spin spiral domain-wall structure in ferromagnetic wires with Dzyaloshinskii-Moriya interaction and critical current dependence on this interaction. We also find the most efficient way to move the domain walls by resonant current pulses and propose a procedure to determine their dynamics by measuring the voltage induced by a moving domain wall. Based on translationally non-invariant nanowires, we show how to make prospective magnetic memory nanodevices much more energy efficient.

Original languageEnglish
Pages (from-to)65-68
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume383
DOIs
Publication statusPublished - 2015 Jun 1

Keywords

  • Domain walls dynamics
  • Ferromagnetic and antiferromagnetic nanowires
  • Magnetic domain walls
  • Topological spin textures

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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