Electrical and magnetic properties of an ising-type ferromagnet NpSb 2

Yoshiya Homma, Dai Aoki, Yoshinori Haga, Hironori Sakai, Shugo Ikeda, Etsuji Yamamoto, Akio Nakamura, Yoshinobu Shiokawa, Yoshichika Onuki

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1 Citation (Scopus)


We succeeded in growing a single crystal of NpSb 2 with the SmSb 2-type orthorhombic structure by the Sb-flux method and measured the electrical resistivity, specific heat, magnetic susceptibility and magnetization. NpSb 2 is found to be an Ising-type ferromagnet with the Curie temperature T C = 47 K, where the ordered moment of 1.6μ B/Np is oriented along the [001] direction. The electronic specific heat coefficient is estimated to be 22 mJ/(K 2·mol). The electrical resistivity for the current J ∥ [001] is by two orders of magnitude larger than that for J ⊥ [001], suggesting the quasi-two-dimensional electronic state.

Original languageEnglish
Article number074715
Journaljournal of the physical society of japan
Issue number7
Publication statusPublished - 2007 Jul


  • Ising-type ferromagnet
  • NpSb
  • Quasi-two-dimensional electronic state
  • Transuranium compound

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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