Phonon anomalies in the intermediate-valence compound Ce0.9Pr0.1Ni5

W. Bührer, P. A. Alekseev, V. N. Lazukov, K. A. Kikoin, A. S. Mishchenko, I. P. Sadikov, R. Hempelmann

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The phonon dispersion curves of the intermediate valence alloy Ce0.9Pr0.1Ni5 and the integral valence reference alloys LaNi5 and PrNi5 have been investigated by coherent inelastic neutron scattering on a triple-axis spectrometer. The lowest zone-center optic mode in Ce0.9Pr0.1Ni5 is distinctly softer than in the reference alloys. Despite the smaller lattice volume of the Ce-based alloy there is no hardening of acoustic and optic phonon branches with respect to the reference systems. The observed effects are interpreted as features of the f-d-hybridisation due to the intermediate valence state of the cerium ion.

Original languageEnglish
Pages (from-to)329-334
Number of pages6
JournalSolid State Communications
Issue number5
StatePublished - 1 Jan 1995
Externally publishedYes


  • A. metals
  • D. phonons
  • D. valence fluctuations
  • E. neutron scattering

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


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