We review our recent 17O NMR results on NpO 2. The compound is suggested to exhibit a magnetic octupolar phase transition at T 0=26 K. From the temperature dependence of 17O- NMR spectrum, the occurrence of two inequivalent oxygen sites has been confirmed below T 0. Furthermore, a dramatic dependence of nuclear spin-lattice relaxation rates on applied field has been observed above and below T 0. These NMR results contrast sharply with those for the antiferromagnet UO 2 and thus highlight the exotic nature of the phase transition in NpO 2.
|Number of pages||3|
|Journal||journal of the physical society of japan|
|Publication status||Published - 2006 Dec 1|
- Multipolar ordering
- Nuclear spin-lattice relaxation rate
ASJC Scopus subject areas
- Physics and Astronomy(all)