Theory of Magnetic Circular Dichroism of the Ce L2,3 X-ray Absorption Spectra in Mixed Valence Vompound CeFe2

Kaname Asakura, Isao Harada, Keiji Fukui, Haruhiko Ogasawara, J. C. Parlebas, Akio Kotani

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Magnetic circular dichroism (MCD) of x-ray absorption spectroscopy (XAS) at Ce L2,3 edges in the typical mixed valence compound CeFe2 is theoretically studied by using the impurity Anderson model combined with a cluster approach. It is found that the energy-dependent polarization of Ce 5d states due to mixing with spin-polarized Fe 3d states is indispensable for explaining the spectra. Our calculations reproduce well the two-peak structure observed in XAS and MCD experiments, especially their energy position, spectral width and energy separation of the two peaks. For a detailed analysis of these, the Coulomb interactions — Udc (between a 5d electron and a core hole) and Ufa (between a 4f electron and a 5d electron) play a special role.

Original languageEnglish
Pages (from-to)2008-2013
Number of pages6
Journaljournal of the physical society of japan
Volume73
Issue number7
DOIs
Publication statusPublished - Jan 1 2004

Keywords

  • L absorption edges
  • cluster model
  • magnetic circular dichroism
  • mixed valence compound

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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