Resonant valence-band photoemission spectroscopy on the Fe62Ni20Cr18 alloy

V. Formoso (), G. Chiarello, R. G. Agostino, L. Papagno, E. Colavita, L. Floreano, R. Gotter, A. Morgante, A. Santaniello and A. Verdini

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 43, issue 4, 463-470

Abstract: The Fe62Ni20Cr18 valence band was studied by scanning the photon energy across the 2p3/2 core-level threshold of each element of the alloy. A resonant enhancement of the weak 3d-like features was observed. In pure transition metals, similar valence band resonances are explained by a radiation-less Raman de-excitation emission, which is active at threshold and degenerate with the two-hole satellite of direct photoemission. Present structures are associated to satellite features occurring in Fe62Ni20Cr18, and their intensities and binding energies are compared to those of the pure metal components. The alloy satellite resonant behaviour reveals some peculiar modifications of: a) the crossover between the radiation-less Raman scattering and the Auger emission regimes; b) the ratio of the relative intensities of the main and satellite peaks. We mainly assign these differences to the hetero-nuclear bonds in the alloy. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
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DOI: 10.1140/epjb/e2005-00079-5

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