Figure 1
XMCD spectra at the Ho L3 absorption edge (E0) of an HoFe2 sample obtained by switching the polarization helicity with a quarter-wave plate. (a) Spectrum obtained with a constant magnetic field parallel to the photon wavevector; (b) spectrum obtained with the magnetic field antiparallel to the photon wavevector; (c) pure XMCD signal without artifacts obtained as the half-difference of spectra (a) and (b); (d) pure residual spectrum R obtained as the half-sum of (a) and (b). |