NMR studies of actinide dioxides

Y. Tokunaga, H. Sakai, T. Fujimoto, S. Kambe, R. E. Walstedt, K. Ikushima, H. Yasuoka, D. Aoki, Y. Homma, Y. Haga, T. D. Matsuda, S. Ikeda, E. Yamamoto, A. Nakamura, Y. Shiokawa, K. Nakajima, Y. Arai, Y. Onuki

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

17O NMR measurements have been performed on a series of the actinide dioxides, UO2, NpO2 and PuO2. Although the 17O NMR spectra in these materials are similar at higher temperatures, the low-temperature spectra present are significantly different. In UO2 we have observed a wide spectrum, forming a rectangular shape below TN = 30 K. In NpO2, on the other hand, the spectra broaden rather gradually and exhibit a two-peak structure below T0 = 26 K. In PuO2, neither spectrum broadening nor splitting has been observed. We show that these NMR spectra clearly indicate the different nature of the low-temperature magnetic ground states in these actinide compounds.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalJournal of Alloys and Compounds
Volume444-445
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2007 Nov

Keywords

  • Actinide dioxides
  • NMR
  • NpO
  • PuO
  • UO

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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