Dresden 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 9: Magnonics I

MA 9.8: Vortrag

Montag, 9. März 2026, 17:00–17:15, HSZ/0004

Surface acoustic wave driven magnetization dynamics in transferred YIG microstructures — •Rouven Dreyer¹, Philip Trempler¹, Seth Kurfman¹, Mathias Küß², Georg Schmidt¹, and Georg Woltersdorf¹ — ¹Martin Luther University Halle-Wittenberg, Institute of Physics, 06120 Halle, Germany — ²Experimental Physics IV, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany

Surface acoustic wave (SAW) devices allow to combine spin-wave based functionality with state-of-the-art radio-frequency technology. However, one of the ongoing challenges on the path towards energy efficient SAW-based spintronic applications is the combination of SAWs as excitation mechanism with micro and nanostructures fabricated from low damping yttrium- iron-garnet (YIG).

Here, we utilize SAWs to mechanically excite spin waves at GHz frequencies in micron-sized crystalline YIG elements. For this, epitaxially grown YIG platelets are transferred and anchored on piezoelectric LiNbO3 substrates [1].

We experimentally demonstrate that the nanoscale coupling between the piezoelectric substrate and the YIG elements results in the excitation of standing spin-wave modes. By utilizing SNS-MOKE [2], we map the mechanical strain profile of the propagating SAW and directly image the excited magnon modes. Our results demonstrate that SAW-induced magnetic excitation is possible over a broad range of wavevectors beyond the conventional symmetry of magneto-elastic coupling.

[1] P. Trempler, et al., Appl. Phys. Lett. 117, 232401 (2020)

[2] R. Dreyer, et al., Nat. Commun. 13, 4939 (2022)

Keywords: Magnonics; Spin wave; SNS-MOKE; Chiral Magnonic Resonator; Magnonic Crystal