NMR observation of quadrupolar order parameter in NpO2

Y. Tokunaga, D. Aoki, Y. Homma, S. Kambe, H. Sakai, S. Ikeda, T. Fujimoto, R. E. Walstedt, H. Yasuoka, Y. Shiokawa, E. Yamamoto, A. Nakamura

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report 17O NMR measurements in a single crystal of NpO2. We have observed oscillatory spin-echo decay for certain O sites below T0 = 26 K. These spin-echo oscillations are well understood in terms of an axially symmetric electric field gradient created by a longitudinal triple-q antiferro-quadrupolar ordering. In the present work, we show that direct observation of the quadrupolar order parameters is possible by means of NMR.

Original languageEnglish
Pages (from-to)735-737
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number2 SUPPL. PART 1
Publication statusPublished - 2007 Mar


  • Multipolar order
  • NMR
  • NpO
  • Spin-echo oscillation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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