Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 16: Magnonics I
MA 16.1: Vortrag
Dienstag, 19. März 2024, 09:30–09:45, EB 107
Propagating spin-wave spectroscopy in a liquid-phase epitaxial nanometer-thick YIG film at millikelvin temperatures — •Sebastian Knauer1, Kristýna Davídková2, David Schmoll1,3, Rostyslav O. Serha1,3, Andrey Voronov1,3, Qi Wang1, Roman Verba4, Oleksandr V. Dobrovolskiy1, Morris Lindner5, Timmy Reimann5, Carsten Dubs5, Michal Urbánek2, and Andrii V. Chumak1 — 1Faculty of Physics, University of Vienna, A-1090 Vienna, Austria — 2CEITEC BUT, Brno University of Technology, 612 00 Brno, Czech Republic — 3Vienna Doctoral School in Physics, University of Vienna, A-1090 Vienna, Austria — 4Institute of Magnetism, Kyiv 03142, Ukraine — 5INNOVENT e.V. Technologieentwicklung, Prüssingstraße 27B, 07745 Jena, Germany
Realising large-scale integrated magnonic circuits for quantum applications requires propagating spin-wave spectroscopy in nanostructures at low temperatures. In this work, we demonstrate all-electrical spin-wave propagation in a 100 nm-thick yttrium-iron-garnet (YIG) film at temperatures down to 45mK. The extracted spin-wave group velocity and the YIG saturation magnetisation agree well with the theoretical values. We show that the gadolinium-gallium-garnet (GGG) substrate influences the spin-wave propagation characteristics only for the applied magnetic fields beyond 75mT, originating from a GGG magnetisation up to 62kA/m (45mK). Our results demonstrate that the developed fabrication and measurement methodologies enable the realisation of integrated magnonic quantum nanotechnologies at millikelvin temperatures.
Keywords: Millikelvin Temperature Magnonics; All-Electrical Spin-wave Propagation; Nanomagnonics; Quantum Magnonics