NMR study of ordered states in NpFe Ga5: Orbitally related ordering below 78 K

S. Kambe, H. Sakai, Y. Tokunaga, R. E. Walstedt, D. Aoki, Y. Homma, Y. Shiokawa

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We report NMR studies on a single crystal of NpFe Ga5, which has the tetragonal HoCo Ga5 (115) structure and exhibits two antiferromagnetically ordered states. In the antiferromagnetic I phase below 118 K, the observed internal field at the Ga(2) (4i) site is consistent with the ordered structure revealed by neutron diffraction measurements. Below 78 K in the antiferromagnetic II phase, two different Ga(2) sites with different electric field gradient tensors appear, which indicates an orbitally related ordering. A possible quadrupolar ordering in the antiferromagnetic II phase is discussed.

Original languageEnglish
Article number144433
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number14
DOIs
Publication statusPublished - 2007 Oct 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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