XAS spectra of Ce2[MnN3] at the Ce-M4,5, Ce-L3, Mn-L2,3 and N-K thresholds

R. Niewa, Z. Hu, C. Grazioli, U. Rößler, M. S. Golden, M. Knupfer, J. Fink, H. Giefers, G. Wortmann, F. M.F. De Groot, F. J. DiSalvo

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Abstract

The X-ray absorption spectroscopy at the Ce-M4,5, Ce-L3, Mn-L2,3 and N-K thresholds was used to study the electronic and magnetic structure of the recently obtained Ce2[MnN3]. Manganese is found to be in a state similar to that in η-Mn3N2, with strong covalency between Mn and N. The multiple peaked structure in the Ce-M4,5 and Ce-L3 XAS spectra indicates that the valence state of cerium in Ce2[MnN3] is only slightly lower than that found in CeO2 containing CeIV with a strong covalent mixture between Ce 4f and ligand 2p states. By simulating the Ce-L3 XAS spectrum using a simplified Anderson impurity model the 4f occupancy was found to be 0.52 for Ce2[MnN3] compared to 0.49 for CeO2 in the ground state.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalJournal of Alloys and Compounds
Volume346
Issue number1-2
DOIs
StatePublished - 18 Nov 2002
Externally publishedYes

Keywords

  • Electronic state
  • Nitridomanganates
  • Rare earth
  • Ternary nitrides
  • XAS

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