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MA: Fachverband Magnetismus

MA 11: Posters Magnetism III

MA 11.10: Poster

Mittwoch, 29. September 2021, 13:30–16:30, P

Electric phase control of magnon currents — •Rostyslav O. Serha, Vitaliy I. Vasyuchka, Alexander A. Serga, and Burkard Hillebrands — Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany

New findings of interactions between electric fields and magnons are promising for novel magnonic applications. They would allow the control of the phase of magnon currents by applying a voltage to the magnetic waveguides. In our work, we investigated the influence of a strong electric field on the phase of propagating spin waves in yttrium iron garnet (YIG) films. The experiment was performed in different spin-wave excitation geometries when volume and surface magnetostatic spin waves were excited. With the help of a vector network analyzer, the phase shift of the transmitted wave, which is sensitive to different external influences, was precisely measured. It was found that the phase shift owing to the electric field influence is relatively strong in the case of magnetostatic surface spin waves but is also observable for backward volume magnetostatic waves. By comparing results obtained for different spin-wave geometries, we discuss the physical nature of the observed phase shift, including possible contributions from the magnetoelectric effect in YIG and from the Aharonov-Casher effect. Funding by the ERC Advanced Grant 694709 SuperMagnonics is gratefully acknowledged.