2024/03/23 by Franz Vilsmeier, Vilsmeier, Franz, Christian U. Riedel +3 · 1 citation
Computer Science · Physics and Astronomy · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Magnetic properties of thin films #Nonlinear Dynamics and Pattern Formation
paper · pdf · doi:10.48550/arxiv.2403.15840
openalex publication_date 2024/03/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Spin-wave (SW) propagation close to the hybridization-induced transmission stop band is investigated within a trapezoid-shaped 200 nm thick yttrium iron garnet (YIG) film using time-resolved magneto-optic Kerr effect (TR-MOKE) microscopy and broadband spin wave spectroscopy, supported by micromagnetic simulations. 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 external field or frequency, spatial control of the spatial stop band position and spin-wave propagation is demonstrated and utilized to gain transmission control over several microstrip lines.