Hard and soft X-ray photoemission spectroscopies of ferromagnetic Sm 4As3

A. Yamasaki, A. Sekiyama, M. Tsunekawa, S. Imada, A. Ochiai, C. Dallera, L. Braicovich, T. L. Lee, S. Suga

Research output: Contribution to journalArticlepeer-review


We have investigated the bulk and surface electronic structures of Sm 4As3 by using hard and soft X-ray photoemission spectroscopies (PESs). The valence band spectral shape changes much with photon energies (hν s) due to the variation of both photoionization cross sections and bulk sensitivity. PES with the wide range of hν s between 220 and 2450 eV demonstrates that the valence of the Sm ions is definitely trivalent in the bulk and divalent at the surface.

Original languageEnglish
Pages (from-to)617-619
Number of pages3
JournalJournal of Electron Spectroscopy and Related Phenomena
Publication statusPublished - 2005 Jun
Externally publishedYes


  • Bulk sensitive
  • Hard X-ray
  • Photoemission
  • SmAs
  • Soft X-ray

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry


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