Abstract
31P-NMR experiments have been performed on a single crystal of NpFe4P12 with applied fields parallel to the 〈111〉 direction for the cubic crystal axis. From K-χ plot above 20 K, the isotropic and anisotropic components of the hyperfine coupling constants between Np-5f electrons and P nuclei have been estimated. A relatively large value of the isotropic component suggests the importance of a transferred hyperfine mechanism through the 3s orbitals of P atoms. In the ferromagnetic ordered state, an additional NMR line splitting associated with the reorientation of the Np moments has been observed below T* = 19 K. Analysis of the NMR line splitting reveals that the Np-5f moments are ferromagnetically aligned along the applied field above T*, while they are reoriented along the ferromagnetic easy-axis of the 〈100〉 direction below T*.
Original language | English |
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Pages (from-to) | 211-213 |
Number of pages | 3 |
Journal | journal of the physical society of japan |
Volume | 77 |
Issue number | SUPPL.A |
DOIs | |
Publication status | Published - 2008 |
Keywords
- Filled-skutterudite
- NMR
- Transuranium
ASJC Scopus subject areas
- Physics and Astronomy(all)