151Eu nuclear resonant inelastic scattering of Eu 4As3 around charge ordering temperature

Hisao Kobayashi, Yoshitaka Yoda, Makoto Shirakawa, Akira Ochiai

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7 Citations (Scopus)

Abstract

151Eu nuclear resonant inelastic scattering (NRIS) experiments have been performed on the charge ordering Eu4As3 compound from 301 to 406K and the Eu partial phonon densities of states were extracted from the observed spectra. We derived the thermodynamic parameters from inelastic components in the observed NRIS spectra using the sum rules. The mean recoilless fraction shows the softening in the lattice vibration of the Eu ion around the charge ordering temperature in spite of no anomaly in the temperature dependence of average sound velocity. We present by the temperature dependence of mean force constant that the hybridization between the 4f states and the conduction or valence bands in Eu4As3 plays a role around the charge ordering temperature and in the valence fluctuating state.

Original languageEnglish
Article number034602
Journaljournal of the physical society of japan
Volume75
Issue number3
DOIs
Publication statusPublished - 2006 Mar 1

Keywords

  • Charge ordering
  • EuAs
  • Force constant
  • Nuclear resonant inelastic scattering
  • Phonon
  • Valence fluctuation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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