[18p-PB1-1~84] 10 Spintronics and Magnetics (Poster)

▲ [18p-PB1-23] Magnetization dynamics in yttrium iron garnet single crystal thin films
induced by slot line waveguides

〇Tetsunori Koda¹, Muroga Sho², Endo Yasushi³ (1.NIT., Oshima College, 2.Akita Univ., 3.Tohoku Univ.)

Keywords:magnetization dynamics, spin waves

We investigated the magnetization dynamics induced by slot line waveguides. The slot line waveguide is one of high frequency waveguides, which consists of two electrodes with the same width. We prepared the waveguides with systematically varied width of electrodes and distance between the electrodes on a 10 µm thick YIG (111) single crystal thin film. We evaluated the reflected power of the input microwave from the waveguide. All the spectrum showed multiple peaks and the peaks shifted higher magnetic field with increasing the input frequency, indicating that the peaks were related with the ferromagnetic resonance (FMR). To understand the origin of multiple peaks, we simulated the dependence of the number of locally applied areas for RF magnetic field. The simulation showed that the multiple local areas’ case only appeared multiple peaks. Our further analysis revealed that the origin of the multiple peaks is due to the magnetical interaction between spin waves created from the local magnetization dynamics in one area and the local magnetization dynamics in the other.