Fig. 2: TR-MOKE measurements.
a Transient minor hysteresis loops at selected pump fluences. As guided by the dashed lines, Hup shows an obvious reduction at high pump fluences while Hdown remains unchanged. b Calculated Hex and HC values from the minor loops as a function of pump fluence F. Within experimental error bars they show the same trend after fs excitations. c Minor hysteresis loops probed at three different pump-probe delays under a fixed pump fluence of 5.60 mJ/cm2. d Extracted time-delayed Hex and HC from transient loops in (c), showing negligible variations within 10 ps. Error bars indicate the uncertainty in determining the displayed value from the experimentally measured data.
