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MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.9: Poster
Mittwoch, 18. März 2020, 15:00–18:00, P3
Magnon condensation in the presence of magnetoelastic interaction — •Vitaliy I. Vasyuchka1, Pascal Frey1, Mio Ishibashi2, Alexander A. Serga1, and Burkard Hillebrands1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany — 2Institute for Chemical Research, Kyoto University, Kyoto, Japan
We report on the investigation of the magnon condensation in the presence of the magnetoelastic interaction in different areas of the magnon phase space. Energy spectra of an overpopulated magnon-phonon gas were studied at room temperature in an yttrium iron garnet (YIG, Y3Fe5O12) film by frequency-, time- and wavevector-resolved Brillouin light scattering (BLS) spectroscopy under different pumping and bias magnetic field conditions. The population of magnon-phonon spectra and its time evolution demonstrate a strong interaction between condensed magnons and accumulated magnetoelastic quasiparticles, when they are located close to each other in the phase space.
Financial support by the European Research Council (ERC) within the Advanced Grant "SuperMagnonics" (Grant agreement No. 694709) is gratefully acknowledged.