XPS study of RNi4B compounds, where R = Nd, Tb, Dy, Ho and Er

Autor(en): Lazar, C.
Burzo, E.
Neumann, M.
Stichwörter: CE; MAGNETIC-PROPERTIES; Materials Science; Materials Science, Multidisciplinary; Optics; Physics; Physics, Applied; PR; rare earth compounds; XPS studies
Erscheinungsdatum: 2008
Herausgeber: NATL INST OPTOELECTRONICS
Journal: JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS
Volumen: 10
Ausgabe: 4
Startseite: 780
Seitenende: 782
Zusammenfassung: 
The RNi4B compounds with R = Nd, Tb, Dy, Ho and Er crystallize in CeCo4B-type structure. XPS measurements were performed at room temperature. The Ni 2p(1/2) and Ni 2p(3/2) core level lines reproduce well those of pure nickel. In all samples, the presence of Ni 6 eV satellite line was shown. This indicates the presence of holes in Ni 3d band, in agreement with magnetic measurements. The R 4d core levels are similar to those evidenced in pure R metals. The 4f orbitals keep their localized character and therefore the XPS spectra show multiplet structures. The small energy shift of R4d and R4f core level lines, as compared to R metals, may be correlated with minor changes in shielding which result from modification of electron concentrations when compounds are formed.
Beschreibung: 
5th International Conference on New Research Trends in Materials Science, Sibiu, ROMANIA, SEP, 2007
ISSN: 14544164

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