Spin-wave transduction at the submicrometer scale: Experiment and modeling

We report a complete study of spin-wave transduction combining microwave measurements performed over a frequency range of [1--15] GHz on Permalloy strips (thickness=10--20 nm, width=2--8 μm) and an accurate modeling of the experiment. This technique has been used recently to assess the spin polarization of the electrical current by measuring a current-induced spin-wave Doppler shift. We present here an electromagnetism calculation based on the magnetostatic wave theory combined with the Gilbert form of the damping that can be used directly as an optimization tool for future spin-wave experiments.