Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 31: Poster II
MA 31.28: Poster
Mittwoch, 19. März 2025, 17:00–19:30, P1
Towards Aharonov–Casher effect based nonreciprocal electrical control of the magnon phase in a perpendicularly magnetised YIG film — •Gabriel Schwöbel1, Alexander A. Serga1, Vitaliy I. Vasyuchka1, Rostyslav O. Serha2, and Burkard Hillebrands1 — 1Fachbereich Physik and Landesforschungszen- trum OPTIMAS, RPTU, 67663 Kaiserslautern — 2Faculty of Physics, University of Vienna, 1090 Vienna
Modulation of phase and amplitude of spin waves plays a crucial role in the realization of ultra-low power magnon-based computing. Therefore, we study the magnon phase change, induced by an applied electric field, in yttrium iron garnet (YIG), which has favourable magnetic properties such as a very low spin wave damping.
Recent studies [1] performed in in-plane magnetized single crystal YIG films have allowed us to evaluate different contributions to this phase change and to provide experimental evidence for the theoretically predicted magnonic Aharonov–Casher effect. This effect describes the accumulation of a geometric phase when a magnon passes through an electric field. In our new setup, which provides a more homogeneous and stable magnetic field, we investigate the non-reciprocal effects of magnon phase accumulation when a tangential electric field is applied to an out-of-plane magnetized YIG film.
[1] R.O. Serha et al., Towards an experimental proof of the magnonic Aharonov–Casher effect, Phys.Rev. B 108, L220404 (2023)
Keywords: Magnonics; Spin waves; Magnetoelectric effect; Aharonov--Casher effect