Low spin wave damping in the insulating chiral magnet Cu2OSeO3

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • I. Stasinopoulos - , Technical University of Munich (Author)
  • S. Weichselbaumer - , Technical University of Munich (Author)
  • A. Bauer - , Technical University of Munich (Author)
  • J. Waizner - , University of Cologne (Author)
  • H. Berger - , Swiss Federal Institute of Technology Lausanne (EPFL) (Author)
  • S. Maendl - , Technical University of Munich (Author)
  • M. Garst - , Chair of Theoretical Solid State Physics, University of Cologne, TUD Dresden University of Technology (Author)
  • C. Pfleiderer - , Technical University of Munich (Author)
  • D. Grundler - , Swiss Federal Institute of Technology Lausanne (EPFL) (Author)

Abstract

Chiral magnets with topologically nontrivial spin order such as Skyrmions have generated enormous interest in both fundamental and applied sciences. We report broadband microwave spectroscopy performed on the insulating chiral ferrimagnet Cu2OSeO3. For the damping of magnetization dynamics, we find a remarkably small Gilbert damping parameter of about 1×10-4 at 5 K. This value is only a factor of 4 larger than the one reported for the best insulating ferrimagnet yttrium iron garnet at room temperature. We detect a series of sharp resonances and attribute them to confined spin waves in the mm-sized samples. Considering the small damping, insulating chiral magnets turn out to be promising candidates when exploring non-collinear spin structures for high frequency applications.

Details

Original languageEnglish
Article number032408
JournalApplied physics letters
Volume111
Issue number3
Publication statusPublished - 17 Jul 2017
Peer-reviewedYes

Keywords

ASJC Scopus subject areas