Single crystal growth of large-size and high-quality NpCoGa5 and its electrical and magnetic properties

Dai Aoki, Yoshiya Homma, Yoshinobu Shiokawa, Etsuji Yamamoto, Akio Nakamura, Yoshinori Haga, Rikio Settai, Tetsuya Takeuchi, Yoshichika Onuki

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


We succeeded in growing a high-quality NpCoGa5 single crystal by the Ga-flux method and measured its electrical resistivity, specific heat, magnetic susceptibility and magnetization. NpCoGa5 is an antiferromagnet with a Néel temperature of 47 K. The magnetic moment of Np is directed along the [001] direction of a tetragonal crystal structure. A sharp metamagnetic transition was observed at Hm = 43 kOe for H ∥ [001], where the antiferromagnetic state is changed to the paramagnetic state above Hm. The ordered moment was determined to be 0.74 μB/Np. The magnetic properties were discussed on the basis of the crystalline electric field scheme of the 5f4 configuration.

Original languageEnglish
Pages (from-to)1665-1668
Number of pages4
Journaljournal of the physical society of japan
Issue number7
Publication statusPublished - 2004 Jul 1


  • CEF
  • Metamagnetism
  • NpCoGa
  • Transuranium compound

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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