Speaker
Description
A parametric excitation is an effective way to excite short waved spin waves. We demonstrate an all electrical approach to measure the parametrically excited spin waves in yttrium iron garnet (YIG) films in that we exploited the frequency offset mode of vector network analyzer. The magnon spectra show a very narrow linewidth for the YIG LPE films close to the reported linewidth due to the intrinsic damping in YIG single crystals. In addition, the spectra show complex dependence on the source power. The results provides better understanding on the propagating parametrically excited spin waves. The research was funded by the EPFL COFUND project No. 665667 (EU Framework Programme for Research & Innovation (2014-2020)) and by the Deutsche Forschungsgemeinschaft (DU 1427/2-1).
