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$$^{31}$$P-NMR study of the neptunium-based filled-skutterudite NpFe$$_4$$P$$_{12}$$

Tokunaga, Yo; Aoki, Dai*; Homma, Yoshiya*; Sakai, Hironori; Chudo, Hiroyuki; Kambe, Shinsaku; Matsuda, Tatsuma; Ikeda, Shugo; Yamamoto, Etsuji; Nakamura, Akio; Haga, Yoshinori; Shiokawa, Yoshinobu*; Onuki, Yoshichika; Yasuoka, Hiroshi

$$^{31}$$P-NMR measurements have been performed on a single crystal of NpFe$$_4$$P$$_{12}$$ which is the first crystallized transuranium filled-skutterudite compound. The field-orientation dependence of the hyperfine interaction has been measured using the single crystal, and the results compared with those obtained previously in isostructural compounds UFe$$_4$$P$$_{12}$$ and PrFe$$_4$$P$$_{12}$$. We have also measured the field and temperature dependence of the nuclear spin-lattice relaxation rate in several fields between 1.8 and 8 T at temperatures between 4.2 and 300 K. The results are discussed on the basis of a localized picture for the 5f electrons.

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Category:Physics, Multidisciplinary

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