%0 Journal Article
%@ 2469-9969
%A Abdurakhimov, L
%A Khan, S
%A Panjwani, NA
%A Breeze, D
%A Mochizuki, M
%A Seki, S
%A Tokura, Y
%A Morton, JJL
%A Kurebayashi, H
%D 2019
%F discovery:10072598
%I AMER PHYSICAL SOC
%J Physical Review B
%N 14
%T Magnon-photon coupling in the noncollinear magnetic insulator Cu2OSeO3
%U https://discovery.ucl.ac.uk/id/eprint/10072598/
%V 99
%X 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.
%Z This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. / This work received funding from the European Union (EU)’s Horizon 2020 research and innovation programme H2020-ICT-2015 under grant agreement No 688539.