Fig. 4: Spin polarized hot electron induced dynamics at the Gd M5 edge. | Nature Communications

Fig. 4: Spin polarized hot electron induced dynamics at the Gd M5 edge.

From: Tuning ultrafast demagnetization with ultrashort spin polarized currents in multi-sublattice ferrimagnets

Fig. 4

a Normalized experimental time-resolved measurements of Gd M5 XMCD were obtained from the transmission signal at a laser fluence of 40 mJ/cm2 (absorbed fluence Fabs = 1.2 mJ/cm2) and at T = 140 K working temperature. The measurements are done in two configurations: Magnetization of Co is parallel (P) (blue curve) and Antiparallel (AP) (red curve) to Fe magnetization. The estimated error bars are the standard deviation of the experimental data with respect to the fitting function. The solid black line represents the exponential fit with Gaussian convolution. We obtained the characteristic demagnetization time, τGd = 900 ± 100 fs. b Dynamics at a longer time scales showing similar dynamics for P and AP. Note that the statistics is not the same between 30 ps and 200 ps than at short time scales.

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