Phenomenological interpretation of MCXD in L2,3 XAS of trivalent cerium compound

K. Fukui, H. Matsuyama, I. Harada, J. C. Parlebas, A. Kotani

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Abstract

We use a model interpretation for the observed MCXD (Magnetic Circular X-ray Dichroism) in L2,3 XAS (X-ray Absorption Spectra) of CeRu2Ge2 as a typical example of normal trivalent cerium compounds. Even in this simplest case of Ce compounds, our analysis needs detailed information on the 4f states, which affect indirectly the electric-dipole transition (2p-5d) through the 4f-5d exchange interaction. We find that the tetragonal crystal field in addition to the spin-orbit coupling for the 4f states is a key interaction to reproduce the MCXD spectra based on an atomic model, in which the polarization effect on the 5d ground state as well as an enhancement of the transition dipole matrix element due to a contraction in the radial part of the 5d orbitals are phenomenologically included.

Original languageEnglish
Pages (from-to)67-72
Number of pages6
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume104
Issue number1-3
Publication statusPublished - 1999

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Keywords

  • Crystal fields
  • L edges
  • MCXD
  • Trivalent cerium compounds

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Fukui, K., Matsuyama, H., Harada, I., Parlebas, J. C., & Kotani, A. (1999). Phenomenological interpretation of MCXD in L2,3 XAS of trivalent cerium compound. Journal of Electron Spectroscopy and Related Phenomena, 104(1-3), 67-72.