Neutron scattering study on commensurate and incommensurate antiferromagnetic phases in UPd2Si2 under uniaxial stress

Takahiro Nakada, Makoto Yokoyama, Chihiro Tabata, Hideki Igarashi, Hiroyuki Hidaka, Hiroshi Amitsuka, Kenichi Tenya, Taku J. Sato

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1 Citation (Scopus)


The nature of competition between incommensurate (IC) and commensurate (C) antiferromagnetic (AF) orders in UPd2Si2 was investigated by performing elastic neutron scattering experiments under uniaxial stress σ. It is found that applying σ along tetragonal [010] direction reduces the IC-AF order, and then stabilizes the C-AF order. The transition temperature from IC- to C-AF phases TNl is enhanced from 109 K (σ = 0) to 112.5 K at (0.8 GPa), while the onset of IC-AF transition TNh is unchanged from 132 K under σ. In addition, c-axis component qz of the IC-AF modulation at 115 K also increases from 0.736 (σ = 0) to 0.747 (0.8 GPa). The magnitude of C-AF moment at 5 K is estimated to be 2.2 μB/U in the entire σ range presently investigated (σ ≤ 0.8 GPa). These features are similar to those obtained from the investigations using hydrostatic pressure p, indicating that applications of p and σ∥ [010] commonly induce the crystal strains which inherently affect a delicate balance of frustrated magnetic interactions between uranium 5f moments.

Original languageEnglish
Article numberSB020
Journaljournal of the physical society of japan
Issue numberSUPPL.B
Publication statusPublished - 2012 Sep
Externally publishedYes


  • Antiferromagnetism
  • Neutron scattering
  • Uniaxial stress

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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