X-Ray Photoemission Spectroscopic Study of Ce-Based Amorphous Alloys

Yoshiya Homma, Masaoki Oku, Kenji Sumiyama, Takehiko Hihara, Hitoshi Amano, Kenji Suzuki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Valence band and core level XPS spectra have been measured for the amorphous CexRu100-x (x = 18, 58, 81), CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys produced by sputtering. The coupling constant between the 4f and conduction electron levels, Δ, and the number of 4f electrons, nf, are estimated from the Ce-3d core level spectra. The amorphous CexCu100-x (x = 14, 33, 50) and Ce66Si34 alloys are heavy fermion systems with small Δ, while the amorphous CexRu100-x (x = 18, 58, 81) alloys are intermediate valence systems with large Δ. We also derive the zero temperature magnetic susceptibility, χ(0), and Kondo temperature, Tκ, from these spectroscopic data and compare with those estimated from several low temperature physical properties.

Original languageEnglish
Pages (from-to)1378-1386
Number of pages9
JournalJournal of the Physical Society of Japan
Volume66
Issue number5
DOIs
Publication statusPublished - 1997 Jan 1

Keywords

  • Amorphous alloy
  • Cerium-copper
  • Cerium-ruthenium
  • Cerium-silicon
  • Core-level
  • Heavy fermion
  • Intermediate valence
  • Kondo temperature
  • Magnetic susceptibility
  • Valence band
  • XPS

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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