Polarization dependence of resonant magneto-optical Kerr effect measured by two types of figure-8 undulators

The resonant magneto-optical Kerr effect of an Fe nanofilm at the L-edge was investigated by theoretically and experimentally using the polarization controlled undulator. Large values of the Kerr rotation angle (θK) were measured at the L2 and L3 absorption edges for both of s- and p-polarized incident lights. Furthermore, the sign changes of θK depending on the photon energy and the polarization of incident light were also observed.