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MA: Fachverband Magnetismus
MA 10: Focus Session: Magnetic Phenomena from Phonon Chirality and Angular Momentum II (joint session MA/TT)
MA 10.6: Talk
Tuesday, March 18, 2025, 10:45–11:00, H16
Temperature dependent magnon-phonon coupling in YIG/GGG heterostructures — •J. Weber1, 2, M. Cherkasskii3, F. Engelhardt3, 4, 5, S.T.B. Goennenwein6, S.Viola Kusminskiy3, 5, S. Geprägs1, R. Gross1, 2, 7, M. Althammer1, 2, and H. Huebl1, 2, 7 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2School of Natural Sciences, Technical University of Munich, Munich, Germany — 3Institute for Theoretical Solid State Physics, RWTH Aachen University, Aachen, Germany — 4Department of Physics, University Erlangen-Nuremberg, Erlangen, Germany — 5Max Planck Institute for the Science of Light, Erlangen, Germany — 6Department of Physics, University of Konstanz, Konstanz, Germany — 7Munich Center for Quantum Science and Technology (MCQST), Munich, Germany
Magnon-phonon coupling in heterostructures has recently gained interest in the context of angular momentum conversion and angular momentum transport via phonons. A typical experimental setting is a bilayer system, where the magnetization dynamics of a magnetic thin film interacts with the elastic standing wave excitations of a non-magnetic bulk crystal. So far, bulk acoustic wave resonators consisting of a ferrimagnetic yttrium iron garnet (YIG) film deposited on a crystalline gadolinium gallium garnet (GGG) substrate have been studied at room temperature due to the favorable magnetic damping properties of YIG [1]. We present a temperature dependent analysis of the magnon-phonon coupling of a YIG/GGG bulk acoustic wave resonator.
[1] K. An et al., Phys. Rev. B 101, 060407, (2020).
Keywords: Magnon-phonon coupling; Magnetoelastic coupling; YIG; heterostructures; Bulk acoustic wave resonator