講演情報
[7a-N302-3]Ultrafast spin dynamics characterization of ferromagnetic YIG/GGG and spin-glass YIG/YAG measured by time-resolved magneto-optic Faraday effect(TR-MOFE)
〇(P)Dongxun Yang1, Md Shamim Sarker1, Hiroyasu Yamahara1, Munetoshi Seki1, Hitoshi Tabata1 (1.Univ. of Tokyo)
キーワード：
YIG、time resolved magneto-optic Faraday effect、spin glass
YIG thin films can exhibit spin glass behavior at room temperature, making them promising candidates for future neuromorphic computing devices. To gain deeper insight into its ultrafast magnetization behavior, a rapid and sensitive characterization method is required. In this work, we implemented a time-resolved magneto-optic Faraday effect (TR-MOFE) system to investigate the spin dynamics of YIG thin films grown on GGG and YAG substrates under varying external magnetic fields.We successfully detected spin precession signals and analyzed the mechanism underlying their observation using tr-MOFE. Finally, key dynamic parameters of YIG were extracted and discussed.