Magnetic hyperfine fields on 140Ce probes substituting for the rare earth in RCo2 laves phases

The magnetic hyperfine fields (MHF) acting on 140Ce probes substituting for the rare-earth sites in RCo2 Laves phases (R = Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm) were determined by perturbed angular correlation spectroscopy. The MHF scales very well with the Co magnetic moment throughout the series as alre...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.631-632
Main Authors: Saitovitch, H, Silva, P.R.J, Carbonari, A.W, Mestnik-Filho, J, Lalic, M.V
Format: Article
Language:English
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Summary:The magnetic hyperfine fields (MHF) acting on 140Ce probes substituting for the rare-earth sites in RCo2 Laves phases (R = Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm) were determined by perturbed angular correlation spectroscopy. The MHF scales very well with the Co magnetic moment throughout the series as already observed with 181Ta, and to a lesser extent, with 111Cd probes. It is shown that the orbital contribution to the MHF is about one order of magnitude smaller than in the free Ce+3 ion. The decrease was attributed to the de-localization of the Ce 4f electrons.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.12.1001