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Figure 14
First femtosecond time-resolved measurement of the pump-laser-induced changes in XAS and XMCD of a 30 nm Ni film (a), which was excited by a femtosecond laser pulse. The X-ray photon energy was set to half of the increasing flank and to the center of the L3 absorption edge for the XAS and XMCD measurements, respectively. The energy resolution was set to 1.5 eV for XAS and 3 eV for XMCD. A time-resolved XMCD measurement from 2010 of a 17 nm Ni film (b, top) and the respective XMCD sum rule analysis (b, bottom). The laser pump fluence was ∼12 mJ cm−2; the applied magnetic field was 0.24 T.

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