Magnetic excitation in totally symmetric staggered ordered phase of PrFe 4P 12

Kazuaki Iwasa, Lijie Hao, Masahumi Kohgi, Keitaro Kuwahara, Jean Michel Mignot, Hitoshi Sugawara, Yuji Aoki, Tatsuma D. Matsuda, Hideyuki Sato

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We report inelastic neutron scattering results for single-crystalline samples of PrFe4P12, which undergoes a transition from the heavy-electron phase to the antiferro-type nonmagnetic ordered phase. In contrast to the quasielastic magnetic response observed in the heavy electron phase, the well-defined inelastic peaks located at 1.5 and 3meV are superimposed in the ordered phase. The maximum spectral intensity appears at the Brillouin zone center for the original Im3̄ structure, and the minimum spectral intensity appears at the zone boundaries including the ordering vector q 0 = (1,0.0). The evolution of the 1.5 meV peak with an applied magnetic field in the ordered phase is in agreement with excitations between 4f-electron crystalline-field- splitting levels, while the 3 meV peak is smeared out rapidly. The spectra are consistent with the recently proposed staggered ordering of a Pr site with well-localized f-electrons and that with a Kondo-singlet-like state, which are represented as the totally symmetric state accompanied by the charge modulation of carriers.

Original languageEnglish
Article number094711
Journaljournal of the physical society of japan
Volume81
Issue number9
DOIs
Publication statusPublished - 2012 Sep

Keywords

  • Crystal-field splitting
  • Heavy electron
  • Kondo effect
  • Magnetic excitation
  • Neutron scattering
  • Rare-earth-filled skutterudite

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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