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MA: Fachverband Magnetismus

MA 3: Magnonics I

MA 3.13: Vortrag

Montag, 17. März 2025, 12:45–13:00, H18

Spatial control of hybridization-induced spin-wave transmission stop band — •Franz Vilsmeier^1,2, Christian Riedel¹, and Christian Back¹ — ¹Technische Universität München — ²Universität Wien

Spin-wave (SW) propagation close to the hybridization-induced transmission stop band is investigated within a trapezoid-shaped 200 nm thick yttrium iron garnet film using time-resolved magneto-optic Kerr effect microscopy. The gradual reduction of the effective field within the structure leads to local variations of the SW dispersion relation and results in a SW hybridization at a fixed position in the trapezoid, where the propagation vanishes since the SW group velocity approaches zero. By tuning the external field or frequency, spatial control of the spatial stop band position and spin-wave propagation is demonstrated.

Keywords: magnonics; spin waves; time-resolved magneto-optical Kerr microscopy