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MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.8: Poster
Mittwoch, 18. März 2020, 15:00–18:00, P3
Investigation of parallel parametric pumping processes in individual YIG nanostructures — •Akira Lentfert1, Björn Heinz1,2, Morteza Mohseni1, Michael Schneider1, Burkard Hillebrands1, Andrii V. Chumak3, and Philipp Pirro1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Mainz, Germany — 3Nanomagnetism and Magnonics, Faculty of Physics, University of Vienna, Vienna, Austria
Yttrium iron garnet (YIG) is a unique material with outstanding magnetic properties such as the lowest known spin-wave damping. It is therefore a promising candidate for the application in spin-wave based circuits and logic devices. Nevertheless, the ability to amplify the spin-wave amplitude and to increase the travel distance is crucial for the realization of such spin-wave logic networks. Parallel parametric pumping is a powerful tool in this regard, which allows for the generation and amplification of spin waves while conserving the phase. In this work, we investigate the parallel parametric generation in individual nanosized YIG conduits with lateral dimension down to 50 nm. Time resolved micro-focused Brillouin-Light-Scattering spectroscopy is used to measure the generated spin-wave spectrum directly below the pumping area, and the pumping threshold is extracted. This research has been supported by ERC starting Grant 678309 MagnonCircuits, DFG Grant DU 1427/2-1 and the Graduate School Material Science in Mainz (MAINZ).