Magnomechanical backaction corrections due to coupling to higher-order Walker modes and Kerr nonlinearities

Bittencourt VA, Potts CA, Huang Y, Davis JP, Viola Kusminskiy S (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Physical Review B American Physical Society

Book Volume: 107

Article Number: 144411

Journal Issue: 14

DOI: 10.1103/PhysRevB.107.144411

Abstract

The radiation pressurelike coupling between magnons and phonons in magnets can modify the phonon frequency (magnomechanical spring effect) and decay rate (magnomechanical decay) via dynamical backaction. Such effects have been recently observed by coupling the uniform magnon mode of a magnetic sphere (the Kittel mode) to a microwave cavity. In particular, the ability to evade backaction effects was demonstrated [C. A. Potts, Phys. Rev. B 107, L140405 (2023)10.1103/PhysRevB.107.L140405], a requisite for applications such as magnomechanical-based thermometry. However, deviations were observed from the predicted magnomechanical decay rate within the standard theoretical model. In this work, we account for these deviations by considering corrections due to (i) magnetic Kerr nonlinearities and (ii) the coupling of phonons to additional magnon modes. Provided that such additional modes couple weakly to the driven cavity, our model yields a correction proportional to the average Kittel magnon mode occupation. We focus our results on magnetic spheres, where we show that the magnetostatic Walker modes couple to the relevant mechanical modes as efficiently as the Kittel mode. Our model yields excellent agreement with the experimental data.

Additional Organisation(s)

Sonderforschungsbereich/Transregio 306/1: Quantenkooperativität von Licht und Materie - QuCoLiMa

Related research project(s)

Optomagnomechanical arrays (B05) TRR 306: Quantenkooperativität von Licht und Materie – QuCoLiMa Jan. 1, 2021 - Dec. 31, 2024

Involved external institutions

Université de Strasbourg (UDS) FR France (FR) Kavli Institute of Nanoscience Delft NL Netherlands (NL) Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) University of Alberta CA Canada (CA)

How to cite

APA:

Bittencourt, V.A., Potts, C.A., Huang, Y., Davis, J.P., & Viola Kusminskiy, S. (2023). Magnomechanical backaction corrections due to coupling to higher-order Walker modes and Kerr nonlinearities. Physical Review B, 107(14). https://doi.org/10.1103/PhysRevB.107.144411

MLA:

Bittencourt, V. A.S.V., et al. "Magnomechanical backaction corrections due to coupling to higher-order Walker modes and Kerr nonlinearities." Physical Review B 107.14 (2023).

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