Fig. 3: Delay scans of time-resolved x-ray magnetic circular dichroism in reflectivity (XMCDR), reflectivity and resonant magnetic x-ray diffraction (RMXD).
(a) TR-XMCDR at 150 K; (b) TR-XMCDR at 250 K; (c) TR-reflectivity at 150 K; (d) TR-reflectivity at 250 K; (e) TR-RMXD at 150 K; (f) TR-RMXD at 250 K. All signals shown are normalized to the unpumped values. The curves are fittings of the data by Eq. (1). Before normalizing to the unpumped value, the RMXD in (e) is processed by first subtracting the reflectivity background and then taking the square root so that the signal is proportional to the antiferromagnetic order parameter. The reflectivity background is calculated from the 250 K curve in Fig. 2(d), which should contain no RMXD signal. The RMXD in (f) is only normalized to the unpumped signal without subtracting the reflectivity background and taking square root. TC and TAFM-FM indicate the Curie temperature and the antiferromagnetic-ferromagnetic transition temperature, respectively.
