^<151>Eu Nuclear Resonant Inelastic Scattering of Eu_4As_3 around Charge Ordering Temperature

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Author(s)

Abstract

<SUP>151</SUP>Eu nuclear resonant inelastic scattering (NRIS) experiments have been performed on the charge ordering Eu<SUB>4</SUB>As<SUB>3</SUB> compound from 301 to 406 K 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 4<I>f</I> states and the conduction or valence bands in Eu<SUB>4</SUB>As<SUB>3</SUB> plays a role around the charge ordering temperature and in the valence fluctuating state.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 75(3), "34602-1"-"34602-6", 2006-03-15

    The Physical Society of Japan (JPS)

References:  24

Codes

  • NII Article ID (NAID)
    110004704680
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    7852499
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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