Multipolar ordering in NpO 2 probed by NMR

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We have initiated the first 17O-NMR measurements in the ordered state of NpO 2. From the 17O-NMR spectrum, we have confirmed the occurrence of two inequivalent oxygen sites below T0 = 26 K. It has also been shown that the 17O-NMR spectrum in the ordered state can be understood by considering an unconventional hyperfine interaction between the 17O nuclear spins and field-induced antiferromagnetic moments arising from the longitudinal triple- q antiferro-quadrupolar order. These NMR results give strong evidence for the occurrence of the longitudinal triple- q multipole structure in NpO 2.

Original languageEnglish
Pages (from-to)929-930
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - 2006 May 1


  • NMR
  • NpO
  • Quadrupolar/octupolar ordering


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