Ga NMR/NQR study in UGa3

K. Ikushima, D. Aoki, Y. Haga, E. Yamamoto, Y. Onuki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Microscopic magnetic properties of a uraniun intermetallic compound, UGa3 (TN = 67 K), have been investigated by the 69Ga and 71Ga NMR/NQR measurements. We found a drastic temperature (T-) dependence of the NQR spectrum near TN, in which a single 69Ga NQR line of 19.8 MHz in the paramagnetic state rapidly vanishes at 70 K and a double peak appears at 17.2 and 16.55 MHz between 63 and 70 K. This result is significantly different from the case of the usual antiferromagnetic ordering, and suggests a transient modification of the electric field gradient at the Ga sites. The Ga nuclear spin-lattice relaxation rate T1-1 in the paramagnetic state shows local character for spin fluctuations of 5f-electrons rather than 5f-itinerant behavior.

Original languageEnglish
Pages (from-to)89-91
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume226-230
Issue numberPART I
DOIs
Publication statusPublished - 2001

Keywords

  • 5f-antiferromagnetism
  • NMR
  • NQR
  • Quadrupole splitting
  • Spin fluctuations

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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