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          Institute: MPI für Chemische Physik fester Stoffe     Collection: publications 2002     Display Documents



ID: 17901.0, MPI für Chemische Physik fester Stoffe / publications 2002
XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, MnL2.3 and N-K thresholds
Authors:Niewa, R.; Hu, Z.; Grazioli, C.; Rößler, U.; Golden, M. S.; Knupfer, M.; Fink, J.; Giefers, H.; Wortmann, G.; de Groot, F. M. F.; DiSalvo, F. J.
Language:English
Date of Publication (YYYY-MM-DD):2002-11-18
Title of Journal:Journal of Alloys and Compounds
Journal Abbrev.:J. Alloy. Compd.
Volume:346
Issue / Number:1-2
Start Page:129
End Page:133
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The X-ray absorption spectroscopy at the Ce-M-4.5, Ce-L-3, Mn- L-2,L-3 and N-K thresholds was used to study the electronic and magnetic structure of the recently obtained Ce-2[MnN3]. Manganese is found to be in a state similar to that in eta- Mn3N2, with strong covalency between Mn and N. The multiple peaked structure in the Ce-M-4.5 and Ce-L-3 XAS spectra indicates that the valence state of cerium in Ce-2[MnN3] is only slightly lower than that found in CeO2 containing Ce-IV with a strong covalent mixture between Ce 4f and ligand 2p states. By simulating the Ce-L-3 XAS spectrum using a simplified Anderson impurity model the 4f occupancy was found to be 0.52 for Ce-2 [MnN3] compared to 0.49 for CeO2 in the ground state. (C) 2002 Elsevier Science B.V. All rights reserved.
Free Keywords:ternary nitrides; nitridomanganates; XAS; rare earth; electronic state
Comment of the Author/Creator:Date: 2002, NOV 18
External Publication Status:published
Document Type:Article
Communicated by:Ina Wanschura
Affiliations:MPI für chemische Physik fester Stoffe
External Affiliations:Max Planck Inst Chem Phys Fester Stoffe, Nothnitzer Str 40, D-; 01187 Dresden, Germany; Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany; Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany; Univ Gesamthsch Paderborn, Fachbereich Phys 6, D-33095 Paderborn, Germany; Univ Groningen, NL-9747 AG Groningen, Netherlands; Cornell Univ, Dept Chem, Ithaca, NY 14853 USA
Identifiers:ISI:000179172500023 [ID No:1]
ISSN:0925-8388 [ID No:2]
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