Presentation Information
[15p-PB1-34]Laser-induced magnetization dynamics in ferrimagnetic Mn4N thin films
〇Yuma Ando1, Satoshi Iihama1, Woonjae Won2, Yuta Sasaki2, Shinji Isogami2, Yukiko Takahashi2, Kensuke Hayashi1, Takahiro Moriyama1 (1.Nagoya Univ., 2.NIMS)
Keywords:
ultrafast magnetization dynamics
We investigated the ultrafast magnetization dynamics of ferrimagnetic Mn4N thin films with low saturation magnetization and strong perpendicular magnetic anisotropy, using the time-resolved magneto-optical Kerr effect. Two oscillatory modes were observed upon optical excitation, with precession frequencies depending on the magnetic field direction and pump intensity. These results of angular dependence and frequency analysis provide fundamental insights into the excitation mechanisms and effective magnetic anisotropy influenced by the perpendicular magnetic anisotropy in Mn4N.