Magnon dispersion shift in the induced ferromagnetic phase of noncentrosymmetric MnSi

Taku J. Sato, Daisuke Okuyama, Tao Hong, Akiko Kikkawa, Yasujiro Taguchi, Taka Hisa Arima, Yoshinori Tokura

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

A small angle neutron inelastic scattering measurement has been performed to study the magnon dispersion relation in the field-induced ferromagnetic phase of the noncentrosymmetric binary compound MnSi. For the magnons propagating parallel or antiparallel to the external magnetic field, we experimentally confirmed that the dispersion relation is asymmetrically shifted along the magnetic field direction. This magnon dispersion shift is attributed to the relativistic Dzyaloshinskii-Moriya interaction, which is finite in noncentrosymmetric magnets, such as MnSi. The shift direction is found to be switchable by reversing the external magnetic field direction.

Original languageEnglish
Article number144420
JournalPhysical Review B
Volume94
Issue number14
DOIs
Publication statusPublished - 2016 Oct 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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