Observation of charge fluctuations in skutterudite compounds through an Sb-NQR measurement

H. Kotegawa, Y. Irie, H. Hidaka, T. C. Kobayashi, D. Kikuchi, H. Sugawara, H. Sato

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report that the nuclear spin-spin relaxation rate 1 / T2 shows characteristic peaks in the skutterudite compounds of ROs4 Sb12 (R = La, Pr, Nd, and Sm) and PrRu4 Sb12. The broadening of Sb-NQR spectrum accompanied with the peak in 1 / T2 suggests that some charge fluctuation exists in these systems and slows down around the peak in 1 / T2. The peaks in 1 / T2 appear around 120 K in all the systems we measured, while the other peaks around 20 K are observed in ROs4 Sb12 (R = Pr, Nd, and Sm). The 12 Sb sites are not equivalent at low temperatures in these compounds.

Original languageEnglish
Pages (from-to)772-774
Number of pages3
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - Apr 1 2008

Keywords

  • Charge fluctuation
  • Heavy fermion
  • NQR
  • Skutterudite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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