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Magnon-photon coupling in the noncollinear magnetic insulator Cu2OSeO3

Abdurakhimov, L; Khan, S; Panjwani, NA; Breeze, D; Mochizuki, M; Seki, S; Tokura, Y; ... Kurebayashi, H; + view all (2019) Magnon-photon coupling in the noncollinear magnetic insulator Cu2OSeO3. Physical Review B , 99 (14) , Article 140401(R). 10.1103/PhysRevB.99.140401. Green open access

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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.

Type: Article
Title: Magnon-photon coupling in the noncollinear magnetic insulator Cu2OSeO3
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.99.140401
Publisher version: https://doi.org/10.1103/PhysRevB.99.140401
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10072598
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