Hyperfine interactions of NpFeGa5 observed by237Np and57Fe Mössbauer spectroscopy

Yoshiya Homma, Saburo Nasu, Akio Nakamura, Masami Nakada, Dai Aoki, Naoto Metoki, Etsuji Yamamoto, Hironori Sakai, Shugo Ikeda, Yoshinori Haga, Yoshichika Onuki, Yoshinobu Shiokawa

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


237Np and57Fe Mössbauer spectroscopy have been applied for the antiferromagnet NpFeGa5 (Tn = 118 K). Hyperfine magnetic field Hhf at Fe nucleus of the NpFeGa5 reaches 20.0±0.5 kOe at 4.2 K. The existence of small quadrupole interaction at Fe sites just below Tn was verified by a measurement of the spectrum in the applied field of 10 kOe. A correlation between the magnetic state and the electric field gradient implies that the origin of Hhf is not only due to the dipole field from magnetic Np atoms, but also from magnetic Fe atoms. Magnetic moment at Np atom is determined to be μnp = 0.94 μb by the237Np Mössbauer spectrum at 10 K.

Original languageEnglish
Pages (from-to)44-46
Number of pages3
Journaljournal of the physical society of japan
Issue numberSUPPL.
Publication statusPublished - 2006 Dec 1


  • Fe
  • Hyperfine interaction
  • Mössbauer spectroscopy
  • Np
  • NpFeGa

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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