X-RAY RESONANCE EXCHANGE SCATTERING STUDY OF ND2FE14B

The X-ray resonance exchange scattering (XRES) has been measured at th e Nd L2,3-edges on the 330, 440 and 550 Bragg reflections in a ferroma gnetic Nd2Fe14B single crystal. The XRES results at the L2-edge reflec t the spin polarization of unoccupied 5d-bands of Nd due to electric d ipole transitions. Those at the L3-edge show the possibility of electr ic quadrupole transitions to the highly localized 4f-states. The tempe rature dependence of XRES confirms the sensitivity to the local magnet ic moment of specific site. The magnetic moments of Nd 4f and 4g sites rotate from