Spin fluctuation and crystal field excitation of heavy-fermion compound YbAgGe studied by inelastic neutron scattering

Takeshi Matsumura, Hideaki Ishida, Taku J. Sato, Kenichi Katoh, Yuzuru Niide, Akira Ochiai

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10 Citations (Scopus)

Abstract

An inelastic neutron scattering experiment has been performed on a new heavy-fermion compound, YbAgGe, for a polycrystalline sample at zero magnetic field. A quasielastic scattering and a crystal field excitation at 12 meV are observed. Both are broadened due to the Kondo effect with an intrinsic width of 0.9 meV at 1.5 K, which increases to about 3 meV at 300 K. The temperature dependence follows Γ0 + A√T typically observed in Kondo systems. Crystal field parameters are also deduced. To explain the result that only one excitation is observed at 12 meV, the B22 term is assumed as the main component.

Original languageEnglish
Pages (from-to)2967-2970
Number of pages4
Journaljournal of the physical society of japan
Volume73
Issue number11
DOIs
Publication statusPublished - 2004 Nov

Keywords

  • Crystal field
  • Heavy fermion
  • Inelastic neutron scattering
  • Spin fluctuation
  • YbAgGe

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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