Magnetic structure study of antiferromagnet NpPtGa5 by neutron diffraction

S. Jonen, N. Metoki, E. Yamamoto, Y. Homma, D. Aoki, Y. Shiokawa, Y. Onuki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The magnetic structure of NpPtGa5was investigated by neutron diffraction. NpPtGa5 exhibits an A-type antiferromagnetic structure with propagation vector over(q, →) = (0, 0, 1 / 2) below TN = 26 K. The estimated Np magnetic moment is 0.38(5) μB, and it is oriented parallel to the 〈 1 0 0 〉 direction. This small moment would be consistent with the large γ = 123 mJ/(K2 mol), indicative of the heavy fermion nature. The field-induced anomaly in the magnetic susceptibility is clarified to be a signature for an antiferromagnetic domain change between multi-domains to single-domain states.

Original languageEnglish
Pages (from-to)84-88
Number of pages5
JournalJournal of Alloys and Compounds
Issue number1-2
Publication statusPublished - 2008 Jan 10


  • Actinide alloy and compounds
  • Heavy fermion
  • Magnetically ordered materials
  • Neutron diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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