Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Magnonics 2
MA 28.7: Vortrag
Donnerstag, 8. September 2022, 11:00–11:15, H43
Symmetry of the magnetoelastic interaction of Rayleigh- and shear horizontal-magnetoacoustic waves — •Matthias Küss1, Michael Heigl1, Luis Flacke2,3, Andreas Hefele1, Andreas Hörner1, Mathias Weiler2,3,4, Manfred Albrecht1, and Achim Wixforth1 — 1University of Augsburg, Experimental Physics I and IV — 2Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften — 3Physics-Department, Technical University Munich, 85748 Garching, Germany — 4Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern
Surface acoustic waves (SAWs) have made their way into many everyday devices. These "nano earthquakes" can be efficiently launched and detected on piezoelectric substrates with periodic metallic gratings. Resonant coupling of SAWs with spin waves (SWs) is the basis for an energy-efficient approach towards SW manipulation. In addition, magnetoacoustic interaction affects the properties of the SAW, which in turn can be used to devise new types of microwave devices. However, SAW-SW coupling is limited to certain experimental geometries, defined by the orientation of the static magnetization with respect to the SW wave vector. This orientation dependence is caused by the SAW mode-specific symmetry of the magnetoelastic driving fields. In this contribution, we demonstrate how the SAW mode-shape determines the symmetry of the magnetoelastic interaction and its nonreciprocal behavior, caused by the SAW-SW helicity mismatch effect [M. Küß et al., Phys. Rev. Applied 15, 034046 (2021)].