Distant Excitation of Spin-Waves—How Electromagnetic Cross-Talk Impacts on Hybrid Magnonic Devices

This work uncovers the impact of electromagnetic cross-talk in hybrid magnonic devices using inductive spin-wave (SW) transducers. We present detailed electrical spin-wave spectroscopy measurements showing the important signal contributions to be considered in magnonic device design. Both the cross-talk and the distant SW excitation are modelled using the Hertzian dipole for a straightforward estimation of parasitic electromagnetic field components. Additionally, we visualize the distant SW excitation via time-resolved MOKE imaging in the forward-volume configuration in a 100nm Yttrium-Iron-Garnet (YIG) system. Our effective cross-talk estimation and in-depth understanding of distant SW excitation allows for a robust design of hybrid magnonic devices.