Magnetic excitations in heavy electron state of filled skutterudite Pr xLa1-xFe4P12 (x = 1.00 and 0.85)

Kazuaki Iwasa, Lijie Hao, Tomoo Hasegawa, Kenji Horiuchi, Youichi Murakami, Junya Otsuki, Yoshio Kuramoto, Masahumi Kohgi, Keitaro Kuwahara, Hitoshi Sugawara, Yuji Aoki, Hideyuki Sato

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10 Citations (Scopus)

Abstract

PrFe4P12 exhibits clear heavy electron behaviors as well as the phase transition to an antiferro-type ordering of 4f electron state. In this paper, we report on inelastic neutron scattering results for powdered samples of PrxLa1-xFe4P12 (x = 1.00 and 0.85). A clear quasielastic magnetic response is observed, and no distinct signal is seen for crystal-field (CF) excitations in the heavy electron state. A model with strong hybridization between conduction electrons and Pr 3+ 4f2 electrons [J. Otsuki et al.: J. Phys. Soc. Jpn. 74 (2005) 200 and 2082] is consistent with the observed magnetic response. This result shows that the heavy electron behavior of PrxLa 1-xFe4P12 (x = 1.00 and 0.85) originates from the Kondo effect associated with low-lying singlet-triplet CF states.

Original languageEnglish
Article number063706
Journaljournal of the physical society of japan
Volume77
Issue number6
DOIs
Publication statusPublished - 2008 Jun

Keywords

  • Dynamical magnetic susceptibility
  • Heavy electron
  • Neutron scattering
  • Rare-earth filled skutterudite

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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