Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.29: Poster
Wednesday, March 18, 2020, 15:00–18:00, P3
Magnetization dynamics in yttrium-iron-garnet/spin-cross-over bilayer systems — •Rostyslav Serha1, Michael Schneider1, Tim Hochdörfer1, Juliusz Wolny1, Björn Heinz1, Carsten Dubs2, Volker Schünemann1, Burkard Hillebrands1, and Philipp Pirro1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany. — 2INNOVENT e.V. Technologieentwicklung, D-07745 Jena, Germany
Spin-Cross-Over (SCO) materials are a promising approach to introduce an additional degree of freedom to the field of magnonics. The temperature induced, hysteretic switching of such materials between their diamagnetic and paramagnetic state potentially allows for a temperature-controlled manipulation of the magnetization dynamics in future magnonic devices. Here we investigate the influence of a SCO-layer coated on top of a thin film of yttrium-iron-garnet (YIG) on the magnetic parameters of the bilayer system. Using Vector-Network-Analyzer Ferromagnetic Resonance (FMR) spectroscopy the magnetic parameters, such as the effective saturation magnetization, the Gilbert damping and the linewidth of the FMR are derived at different temperatures. The phase transition of the SCO-material is found to be accompanied by an increased linewidth. The results obtained provide new insight into the behaviour of spin waves in YIG/SCO-systems and open up new avenues in the development of new magnonic logic gates. This research has been supported by: DFG SFB/TRR 173 Spin+X, Project B01, A04.