Ultrafast spin-switching of a ferrimagnetic alloy at room temperature traced by resonant magneto-optical Kerr effect using a seeded free electron laser.

Authors :: 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.
Source :: Review of Scientific Instruments; Aug2015, Vol. 86 Issue 8, p1-5, 5p, 2 Diagrams, 2 Graphs
Publication Year :: 2015
Abstract: 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. [ABSTRACT FROM AUTHOR]

Subjects :: FERRIMAGNETIC materials
IRON alloys
KERR magneto-optical effect
MAGNETOOPTICS
FREE electron lasers

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