13:30 〜 15:30
▲ [14p-PA1-54] Spin wave transport in different metallic and ferromagnetic YIG bilayer system
キーワード：Spin wave, YIG, spin pumping
We present the experimental observation of the effect of different metal stripe on the spin wave (SW) propagation path in one dimensional magnonic crystal of yittrium iron garnet (YIG). Propagating magnetostatic surface spin wave (MSSW) was excited and detected by metallic co-planner wave guide (CPW) and vector network analyzer (VNA). Detected SW signal shows that insertion of metallic stipe can suppress the spin wave propagation, which is different for different metal interfaces. Our experimental observation is quite different than the previous mathematical prediction. Because, in their prediction they have considered the spin pumping dependent enhancement of damping constant in the magnonic layer only. However, another crucial phenomenon named as spin backflow and two magnon scattering plays significant role in the material with weaker spin orbit interactions (SOI).