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：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

来源：Review of Scientific Instruments, 2015, 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.

• 出版日期2015-8