Research Update - Towards quantum magnonics with long-propagating magnons скачать в хорошем качестве

Research Update - Towards quantum magnonics with long-propagating magnons

In this video we report about our research providing direct experimental evidence of the inhomogeneous GGG stray field as the origin for the observed asymmetric broadening of the FMR linewidth. Furthermore, microstructuring the YIG film allowed to successfully avoid the parasitic broadening and significantly decrease the linewidth to temperatures down to 10K. In our second article, we provide clear experimental evidence that the dipolar coupling of the YIG film and the magnetized GGG substrate at cryogenic temperatures leads to a wavenumber-dependent dissipation rate. After an initial increase of the dissipation at low wavenumbers, the theoretical model predicted a dramatic decrease of the dissipation rate at high wavenumbers as the dipolar coupling decreases exponentially. We suggest that short wavelength exchange-dominated magnons could serve as promising candidates for quantum magnonics in YIG/GGG platforms. In this video, David Schmoll discusses investigations around this topic and the exciting results published on Physical Review B and Low Temperature Physics. Read the articles: Schmoll, D., Serha, R.O., Panda, J., Voronov, A.A., Dubs, C., Urbánek, M. and Chumak, A.V., 2025. Elimination of substrate-induced ferromagnetic resonance linewidth broadening in the epitaxial system YIG–GGG by microstructuring. Low Temperature Physics, 51(6), pp.724-730. https://doi.org/10.1063/10.0036749 Schmoll, D., Voronov, A.A., Serha, R.O., Slobodianiuk, D., Levchenko, K.O., Abert, C., Knauer, S., Suess, D., Verba, R. and Chumak, A.V., 2025. Wavenumber-dependent magnetic losses in yttrium iron garnet–gadolinium gallium garnet heterostructures at millikelvin temperatures. Physical Review B, 111(13), p.134428. 10.1103/PhysRevB.111.134428 Want to learn more about our work and our group? Visit our website: https://nanomag.univie.ac.at/ Follow us on Instagram:   / nanomagvie   #physics #science #materials #magnonics #astronomy #education #mathematics #engineering #maths #mathc #physicsfun #quantumphysics #universe #scientist #cosmos #technology #physicsclass #aiims #jee #physicsfacts #sciencefacts #cosmology #vienna #univie