X-RAY RESONANCE EXCHANGE SCATTERING AT THE ND L2,3-EDGES IN ND2FE14B

X-ray resonance exchange scattering has been measured at the Nd L2,3 absorption edges on the (440) Bragg reflection in a ferromagnetic Nd2Fe14B single crystal. The magnetic spectrum at the L2-edge reflects the spin polarization of unoccupied 5d-bands of Nd due to electric dipole transitions. The magnetic spectrum at the L3-edge shows a more complicated structure than that at the L2-edge. The difference in magnetic spectra between the L2- and L3-edges is discussed from the viewpoints of LS coupling in 5d-bands and the contribution of electric quadrupole transitions to the highly localized and partially vacant 4f-states.