ON THE DEVELOPING OF NET CE MAGNETIC-MOMENT UPON H2 ABSORPTION IN CE2FE14B - AN XCMD INVESTIGATION

We present a combined X-ray Absorption Spectroscopy (XAS) and X-Ray Ci rcular Magnetic Dichroism (XCMD) investigation performed at the Ce L-e dges in the case of Ce2Fe14B and its hydride derivatives. Both XAS and XCMD data do not show any modification of the mixed-valence electroni c state of cerium upon hydriding. In fact, our results rule out the hy pothesis of the presence of a pure Ce3+ configuration in the hydride d erivative and the resulting induction of a localized 4f magnetic momen t on the Ce sites upon hydriding.