Microscopic and Spectroscopic Studies of Light-Induced Magnetization Switching of GdFeCo Facilitated by Photoemission Electron Microscopy

作者：Ohkochi Takuo^*; Fujiwara Hidenori; Kotsugi Masato; Tsukamoto Arata; Arai Kuniaki; Isogami Shinji; Sekiyama Akira; Yamaguchi Jun' ichi; Fukushima Kazuaki; Adam Roman; Schneider Claus M; Nakamura Tetsuya; Kodama Kenji; Tsunoda Masakiyo; Kinoshita Toyohiko; Suga Shigemasa

来源：Japanese Journal of Applied Physics, 2012, 51(7): 073001.

DOI：10.1143/JJAP.51.073001

By means of soft X-ray photoemission electron microscopy (PEEM), we have for the first time observed spatially and temporally resolved element-specific magnetization switching driven by circularly polarized femtosecond laser pulses. We have confirmed that the magnetization switching depending on the helicity of the circularly polarized laser occurs in the region where the spin temperature is raised appropriately. It is also found that the electronic states in the irradiated region remain unchanged even after millions magnetization reversal cycles.

• 出版日期2012-7