[23a-A205-1~13] 10.2 Fundamental and exploratory device technologies for spin

△ [23a-A205-3] Dynamics of Elliptical skyrmions

〇Kazuto Takahashi¹, Takahiko Naruse¹, Kenji Kondo¹ (1.RIES, Hokkaido Univ.)

Keywords:elliptical skyrmions, ferromagnets, Micromagnetic simulations

Magnetic skyrmions have been expected to be applied to the spintronics devices due to their stability against the external perturbations. Recently, the elliptical skyrmions have been discovered and have attracted much attention. In this study, we investigate the dynamics of the elliptical skyrmions using the spin transfer torque (STT) and the spin Hall torque (SHT). Then, we show the dependences of the velocities and the skyrmion Hall angles on the elliptical ratio under STT and SHT, respectively. Moreover, we propose the reason why the different dependence on the elliptical ratio happens and we also show the phase diagrams of chiral magnets, using which we propose the regions where the elliptical skyrmions appear.