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Tunable magnon-photon coupling in a compensating ferrimagnet : from weak to strong coupling

Tunable magnon-photon coupling in a compensating ferrimagnet : from weak to strong coupling

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MAIER-FLAIG, Hannes, Michael HARDER, Stefan KLINGLER, Zhiyong QIU, Eiji SAITOH, Mathias WEILER, Stephan GEPRÄGS, Rudolf GROSS, Sebastian T. B. GÖNNENWEIN, Hans HUEBL, 2017. Tunable magnon-photon coupling in a compensating ferrimagnet : from weak to strong coupling. In: Applied Physics Letters. American Institute of Physics (AIP). 110(13), 132401. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4979409

@article{MaierFlaig2017-01-31T10:03:15ZTunab-51820, title={Tunable magnon-photon coupling in a compensating ferrimagnet : from weak to strong coupling}, year={2017}, doi={10.1063/1.4979409}, number={13}, volume={110}, issn={0003-6951}, journal={Applied Physics Letters}, author={Maier-Flaig, Hannes and Harder, Michael and Klingler, Stefan and Qiu, Zhiyong and Saitoh, Eiji and Weiler, Mathias and Geprägs, Stephan and Gross, Rudolf and Gönnenwein, Sebastian T. B. and Huebl, Hans}, note={Article Number: 132401} }

Geprägs, Stephan Saitoh, Eiji Gross, Rudolf Gross, Rudolf Klingler, Stefan 2020-11-17T10:46:49Z Klingler, Stefan Huebl, Hans We experimentally study the magnon-photon coupling in a system consisting of a compensating ferrimagnet gadolinium iron garnet (GdIG) and a three-dimensional microwave cavity. The temperature is varied in order to tune the GdIG magnetization and to observe the transition from the weak coupling regime to the strong coupling regime. By measuring and modelling the complex reflection parameter of the system, the effective coupling rate g<sub>eff</sub> and the magnetization M<sub>eff</sub> of the sample are extracted. Comparing g<sub>eff</sub> with the magnon and the cavity decay rate, we conclude that the strong coupling regime is easily accessible using GdIG. We show that the effective coupling strength follows the predicted square root dependence on the magnetization. Harder, Michael Weiler, Mathias Maier-Flaig, Hannes 2017-01-31T10:03:15Z Saitoh, Eiji Qiu, Zhiyong Geprägs, Stephan eng Gönnenwein, Sebastian T. B. terms-of-use 2020-11-17T10:46:49Z Weiler, Mathias Huebl, Hans Gönnenwein, Sebastian T. B. Tunable magnon-photon coupling in a compensating ferrimagnet : from weak to strong coupling Maier-Flaig, Hannes Qiu, Zhiyong Harder, Michael

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