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Figure 8
(a) XMCD-PEEM at the Co L3 edge, showing the out of-plane magnetic domains in Gr/Co/Re; from left to right: room temperature, 195, 308 and 375 °C. (b) Selected hysteresis curves of the same sample at different temperatures, as indicated by the labels. MOKE was performed in polar geometry, with the polarizers at 45°, using the following acquisition parameters: AC gain = 10×, DC gain = 1×, PEM frequency f = 50.037 kHz, lock-in amplifier tuned on 2f and number of averaged loops = 5. Temperature dependence of (c) the coercive field and (d) the Kerr rotation angle at saturation, θK,sat.

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