Multiscale simulations of topological transformations in magnetic-skyrmion spin structures

Andrea De Lucia, Kai Litzius, Benjamin Krüger, Oleg A. Tretiakov, Mathias Kläui

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Magnetic skyrmions belong to the most interesting spin structures for the development of future information technology as they have been predicted to be topologically protected. To quantify their stability, we use an innovative multiscale approach to simulating spin dynamics based on the Landau-Lifshitz-Gilbert equation. The multiscale approach overcomes the micromagnetic limitations that have hindered realistic studies using conventional techniques. We first demonstrate how the stability of a skyrmion is influenced by the refinement of the computational mesh and reveal that conventionally employed traditional micromagnetic simulations are inadequate for this task. Furthermore, we determine the stability quantitatively using our multiscale approach. As a key operation for devices, the process of annihilating a skyrmion by exciting it with a spin polarized current pulse is analyzed, showing that skyrmions can be reliably deleted by designing the pulse shape.

Original languageEnglish
Article number020405
JournalPhysical Review B
Volume96
Issue number2
DOIs
Publication statusPublished - 2017 Jul 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Multiscale simulations of topological transformations in magnetic-skyrmion spin structures'. Together they form a unique fingerprint.

Cite this