Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 42: Posters Magnetism I
MA 42.42: Poster
Mittwoch, 18. März 2020, 15:00–18:00, P3
Investigation of phonon interference for acoustically driven spin waves — •Felix Kohl1, Moritz Geilen1, Tobias Böttcher1, Alexandra Nicoloiu2, Florin Ciubotaru3, Christoph Adelmann3, Alexandru Müller2, Burkard Hillebrands1, and Philipp Pirro1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany — 2IMT, Bucharest, Romania — 3IMEC, Leuven, Belgium
We present the investigation of two interfering phonon modes using Brillouin light scattering spectroscopy. For the spin wave excitation by surface acoustic waves it is of great importance to have a valid understanding of the exciting acoustic waves. For this work the surface acoustic waves are generated by interdigital transducers at GHz frequencies, which are commonly used in telecommunication technology. An investigation using BLS microscopy allows for measurements with a high spatial resolution at GHz frequencies. We could observe a characteristic interference pattern of phonon intensity behind the IDT. Wave-vector resolved BLS-measurements allow an explanation of the observed pattern with the interference of the Rayleigh mode and the first Sezawa mode. We acknowledge the support of the EU under H2020 FET Open Project CHIRON (grant agreement no 692519 2018 - 2021).