X-Ray Magnetic Circular Dichroism Studies on CeNi4B

T. Toliński a, J.C. Cezar b, H. Wende c, A. Kowalczyk a and K. Baberschke d a Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland b E.S.R.F., 6 rue Jules Horowitz, 38043 Grenoble Cedex, France c Universität Duisburg-Essen Fachbereich Physik, Lotharstr. 1, 47048 Duisburg, Germany d Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany

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The CeNi4B compound is a mixed-valence system. It is a paramagnet with μeff= 0.52 μB/f.u. and the paramagnetic Curie temperature θ= -10.7 K. In the present research we complete our previous magnetic susceptibility and X-ray photoemission measurements with new studies by the X-ray magnetic circular dichroism method. The observation of the Ce M4,5 edges carried out with X-ray magnetic circular dichroism confirms the mixed-valence state deduced previously from X-ray photoemission spectroscopy. Moreover, we report on the measurements of the Ni L2,3 edges, which enable verification of the Ni contribution to the magnetism of this compound.

DOI: 10.12693/APhysPolA.115.129 PACS numbers: 71.20.Lp, 75.20.Hr, 78.70.Dm, 79.60.-i, 78.20.Ls