利用种子自由电子激光通过共振磁光克尔效应追踪室温下亚铁磁合金的超快自旋切换。
Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effect using a seeded free electron laser.
作者信息
Yamamoto Sh, Taguchi M, Someya T, Kubota Y, Ito S, Wadati H, Fujisawa M, Capotondi F, Pedersoli E, Manfredda M, Raimondi L, Kiskinova M, Fujii J, Moras P, Tsuyama T, Nakamura T, Kato T, Higashide T, Iwata S, Yamamoto S, Shin S, Matsuda I
机构信息
Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.
Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan.
出版信息
Rev Sci Instrum. 2015 Aug;86(8):083901. doi: 10.1063/1.4927828.
Ultrafast magnetization reversal of a ferrimagnetic metallic alloy GdFeCo was investigated by time-resolved resonant magneto-optical Kerr effect measurements using a seeded free electron laser. The GdFeCo alloy was pumped by a linearly polarized optical laser pulse, and the following temporal evolution of the magnetization of Fe in GdFeCo was element-selectively traced by a probe free electron laser pulse with a photon energy tuned to the Fe M-edge. The results have been measured using rotating analyzer ellipsometry method and confirmed magnetization switching caused by ultrafast heating.
利用种子自由电子激光通过时间分辨共振磁光克尔效应测量研究了亚铁磁性金属合金GdFeCo的超快磁化反转。GdFeCo合金由线偏振光激光脉冲泵浦，随后通过光子能量调谐到Fe M边的探测自由电子激光脉冲对GdFeCo中Fe的磁化随时间的演化进行元素选择性追踪。结果采用旋转分析器椭圆偏振法测量，并证实了由超快加热引起的磁化翻转。
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