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Pure Appl. Chem., 2000, Vol. 72, No. 11, pp. 2149-2157

Localization and bandwidth of the 3d-orbitals in magnetic Ni and Co clusters

J. Morenzin, H. Kietzmann, P. S. Bechthold*, G. Ganteför and W. Eberhardt

Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany

Abstract: Photoelectron spectra of negatively charged Nin- , Cun-, and Con- clusters are presented. The spectra of the Nin- clusters contain information about the degree of localization of the 3d valence orbitals, which is strongly related to the magnetic properties. In the clusters with less than 7 atoms, the 3d orbitals seem to be almost totally localized. For Co13- we find indications of a narrowing of the 3d-derived valence "bandwidth" corresponding to a presumed high symmetry and a high degree of degeneracy of the 3d electronic states.