Journalartikel

Jahr der Veröffentlichung: 1997

Seiten: 177-185

Zeitschrift: Journal of Alloys and Compounds

Bandnummer: 246

Heftnummer: 1-2

ISSN: 0925-8388

DOI Link: https://doi.org/10.1016/S0925-8388(96)02474-7

Verlag: Elsevier

Abstract: 
The series of tetravalent lanthanide (Ln) fluorides, M(3)LnF(7) (M=Cs, Rb; Ln=Ce, Pr, Nd, Tb, Dy), was investigated by X-ray absorption near-edge-structure (XANES) spectroscopy at the Ln-L(III), Ln-M(IV,V), and F-K absorption thresholds as well as by 3d core-level and valence-band photoemission. This systematic study includes all five Ln elements for which the tetravalent state has been stabilized so far. The observed multi-peaked spectra reflect the correlated electronic structure of these materials, which is characterized by strong 4f/ligand-p hybridization. A description of the Ln core-level spectra on the basis of a simplified Anderson single-impurity model reveals that the strength of the 4f/ligand-p hybridization increases in the sequence Cs2RbTbF7-->Cs2RbDyF7-->Cs2RbCeF7-->Cs2RbPrF7-->Cs2RbNdF7. XANES spectra at the F-K threshold were also studied as a direct monitor of holes in the ligand-p shell caused by covalent hybridization.

Harvard-Zitierstil: Hu, Z., Kaindl, G. and Muller, B. (1997) Core-level spectroscopy of the tetravalent lanthanide compounds M(3)LnF(7) (with M=Cs, Rb; Ln=Ce, Pr, Nd, Tb, Dy), Journal of Alloys and Compounds, 246(1-2), pp. 177-185. https://doi.org/10.1016/S0925-8388(96)02474-7

APA-Zitierstil: Hu, Z., Kaindl, G., & Muller, B. (1997). Core-level spectroscopy of the tetravalent lanthanide compounds M(3)LnF(7) (with M=Cs, Rb; Ln=Ce, Pr, Nd, Tb, Dy). Journal of Alloys and Compounds. 246(1-2), 177-185. https://doi.org/10.1016/S0925-8388(96)02474-7