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 Circular Magnetic Dichroism (XCMD) investigation performed at the Ce L-edges in the case of Ce2Fe14B and its hydride derivantives. Both XAS and XCMD data do not show any modification of the mixed-valence electronic state of cerium upon hydriding. In fact, our results rule out the hypothesis of the presence of a pure Ce3+ configuration in the hydride derivative and the resulting induction of a localized 4f magnetic moment on the Ce sites upon hydriding.