Discretized topological Hall effect emerging from skyrmions in constricted geometry

N. Kanazawa, M. Kubota, A. Tsukazaki, Y. Kozuka, K. S. Takahashi, M. Kawasaki, M. Ichikawa, F. Kagawa, Y. Tokura

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

We investigate the skyrmion formation process in nanostructured FeGe Hall-bar devices by measurements of the topological Hall effect, which extracts the winding number of a spin texture as an emergent magnetic field. Stepwise profiles of the topological Hall resistivity are observed in the course of varying the applied magnetic field, which arise from instantaneous changes in the magnetic nanostructure such as the creation, annihilation, and jittering motion of skyrmions. The discrete changes in the topological Hall resistivity demonstrate the quantized nature of an emergent magnetic flux inherent in each skyrmion, which had been indistinguishable in many-skyrmion systems on a macroscopic scale.

Original languageEnglish
Article number041122
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number4
DOIs
Publication statusPublished - 2015 Jan 28

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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