[19a-331-1~6] 10.2 Fundamental and exploratory device technologies for spin

▼ [19a-331-2] Element-specific observation of photo-induced magnetization dynamics in FePt thin films

〇(D)Kohei Yamamoto^1,2, Yuya Kubota³, Yasuyuki Hirata^1,2, Kou Takubo¹, Yohei Uemura⁴, Ryo Fukaya⁵, Kenta Tanaka⁶, Wataru Nishimura⁶, Takuo Ohkochi³, Motohiro Suzuki³, Tetsuo Katayama³, Tadashi Togashi³, Kenji Tamasaku⁷, Makina Yabashi^3,7, Yoshihito Tanaka⁶, Takeshi Seki⁸, Koki Takanashi⁸, Hiroki Wadati^1,2 (1.ISSP, Univ. of Tokyo, 2.Dept. of Phys., Univ. of Tokyo, 3.JASRI, 4.IMS, 5.IMSS, KEK, 6.Dept. of Mater. Sci., Univ. of Hyogo, 7.RIKEN, 8.IMR, Tohoku Univ.)

Keywords:magnetization dynamics

We studied photo-induced transient state of perpendicularly magnetized FePt thin films from the point of view of element dependence by time-resolved measurements. We reported the results of Pt L edge time-resolved X-ray mangetic circular dichroism (XMCD) in the last JSAP meeting. In addition to XMCD, we cariied out time resolved Kerr effect measurement under the same experimental condition. We will discuss element dependence of magnetization dynamics by comparison of these experiments.