Ru-NQR studies on filled skutterudite compounds R Ru4 P12 (R = La, Nd, Sm)

S. Masaki, T. Mito, M. Takemura, S. Wada, H. Harima, D. Kikuchi, H. Sato, H. Sugawara, N. Takeda, G. q. Zheng

Research output: Contribution to journalArticle

Abstract

We report nuclear quadrupole resonance (NQR) studies on Ru-sites of filled skutterudite compounds R Ru4 P12 (R = La, Nd, Sm) in zero magnetic field. For NdRu4 P12, the 101Ru-NQR signal disappears below TC = 1.6 K, which is indicative of the transformation into the ferromagnetically ordered ground state. For SmRu4 P12, a single 101Ru-NQR line splits into two lines below the metal-insulator transition temperature TMI = 16.5 K with the intensity ratio of 3 : 1. This result gives evidence that there are two inequivalent Ru-sites with different electric field gradient. The intensity ratio leads to a conclusion that the symmetry is lowered below TMI from a cubic Im over(3, -) space group to a trigonal R over(3, -) one.

Original languageEnglish
Pages (from-to)1630-1632
Number of pages3
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - Apr 1 2008

Keywords

  • Filled skutterudite
  • Metal-insulator transition
  • NQR
  • SmRu P

ASJC Scopus subject areas

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

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    Masaki, S., Mito, T., Takemura, M., Wada, S., Harima, H., Kikuchi, D., Sato, H., Sugawara, H., Takeda, N., & Zheng, G. Q. (2008). Ru-NQR studies on filled skutterudite compounds R Ru4 P12 (R = La, Nd, Sm). Physica B: Condensed Matter, 403(5-9), 1630-1632. https://doi.org/10.1016/j.physb.2007.10.205