Fig. 4: SCARF of ultrafast demagnetization of a GdFeCo thin film.

a Schematic of the experimental setup. The probe pulse passes through an object (see inset) to probe two different areas of the sample simultaneously. b Stack-ups of normalized intensity of s- and p-polarization in the two selected areas. c Time-resolved normalized intensity difference between the s- and p-polarization light for Bar 1 (top) and Bar 2 (bottom). The marker center and the error bar in c represent the mean value and the standard deviation, respectively.