Magnon-photon coupling in the noncollinear magnetic insulator Cu2 OSeO3

L. V. Abdurakhimov, S. Khan, N. A. Panjwani, J. D. Breeze, M. Mochizuki, S. Seki, Y. Tokura, J. J.L. Morton, H. Kurebayashi

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4 Citations (Scopus)

Abstract

Anticrossing behavior between magnons in the noncollinear chiral magnet Cu2OSeO3 and a two-mode X-band microwave resonator was studied in the temperature range 5-100 K. In the field-induced ferrimagnetic phase, we observed a strong-coupling regime between magnons and two microwave cavity modes with a cooperativity reaching 3600. In the conical phase, cavity modes are dispersively coupled to a fundamental helimagnon mode, and we demonstrate that the magnetic phase diagram of Cu2OSeO3 can be reconstructed from the measurements of the cavity resonance frequency. In the helical phase, a hybridized state of a higher-order helimagnon mode and a cavity mode - a helimagnon polariton - was found. Our results reveal a class of magnetic systems where strong coupling of microwave photons to nontrivial spin textures can be observed.

Original languageEnglish
Article number140401
JournalPhysical Review B
Volume99
Issue number14
DOIs
Publication statusPublished - 2019 Apr 3

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Abdurakhimov, L. V., Khan, S., Panjwani, N. A., Breeze, J. D., Mochizuki, M., Seki, S., Tokura, Y., Morton, J. J. L., & Kurebayashi, H. (2019). Magnon-photon coupling in the noncollinear magnetic insulator Cu2 OSeO3. Physical Review B, 99(14), [140401]. https://doi.org/10.1103/PhysRevB.99.140401