Characteristic high-field magnetization in a transuranium antiferromagnet NpRhGa5

Kiyohiro Sugiyama, Hiroshi Nakashima, Dai Aoki, Yoshinori Haga, Etsuji Yamamoto, Akio Nakamura, Yoshiya Homma, Yoshinobu Shiokawa, Koichi Kindo, Masayuki Hagiwara, Yoshichika Onuki

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6 Citations (Scopus)


We have measured the high-field magnetization for a transuranium antiferromagnet NpRhGa5 with two successive antiferromagnetic transition temperatures of TN1 = 36 and TN2 = 32 K and an ordered moment of 0.96 μB/Np. For the magnetic field along the easy-axis of the [100] direction of the tetragonal structure, the magnetization indicates a metamagnetic transition at Hc = 26 T with a sharp step and saturates above Hs = 38 T, with 0.43 μB/Np. On the other hand, the hard-axis magnetization for H ∥ [001] increases linearly and saturates above Hs = 28 T, with 0.44 μB/Np. These magnetization curves were discussed on the basis of reorientation and reduction of the magnetic moment.

Original languageEnglish
Article number094707
Journaljournal of the physical society of japan
Issue number9
Publication statusPublished - 2006 Sept


  • High field magnetization
  • Magnetic anisotropy
  • Metamagnetic magnetization
  • NpRhGa

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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