NMR study of β-pyrochlore oxide superconductor KOs2 O6

M. Yoshida, K. Arai, R. Kaido, M. Takigawa, S. Yonezawa, Y. Muraoka, Z. Hiroi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We report results of NMR measurements on the 39, 41K and 17O nuclei in KOs2 O6. We found that the relaxation rate divided by temperature 1 / (T1 T) at the K sites is strongly enhanced compared with the values expected from the Knight shift and the Korringa relation. By comparing the results at the 39K and 41K sites, we conclude that the relaxation at the K sites is caused entirely by phonons via the electric quadrupole interaction. Consequently, our results provide information about the dynamics of isolated anharmonic vibration associated with the rattling of K ions.

Original languageEnglish
Pages (from-to)698-699
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 1
DOIs
Publication statusPublished - Mar 1 2007
Externally publishedYes

Keywords

  • KOs O
  • NMR
  • Rattring
  • Superconductivity
  • β-Pyrochlore oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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