Nonequilibrium Antiferromagnetic State in the Heavy Electron Compound URu_2Si_2

M. Yokoyama; J. Nozaki; H. Amitsuka; K. Watanabe; S. Kawarazaki; H. Yoshizawa; J. A. Mydosh

Nonequilibrium Antiferromagnetic State in the Heavy Electron Compound URu_2Si_2

Strongly Correlated Electrons 2007-05-23 v1

Authors: M. Yokoyama , J. Nozaki , H. Amitsuka , K. Watanabe , S. Kawarazaki , H. Yoshizawa , J. A. Mydosh

Abstract

We have investigated the nature of the antiferromagnetic (AF) phase induced by uniaxial stress sigma in URu2Si2, by performing elastic neutron scattering measurements up to 0.4 GPa. We have found that the AF Bragg-peak intensity shows a clear hysteresis loop with sigma under the zero-stress cooling condition. The result strongly suggests that the sigma-induced AF phase is metastable and separated from the coexisting "hidden ordered" phase by a first-order phase transition. We also present the analyses of the crystalline strain effects, and suggest that the c/a ratio plays an important role in the competition between these two phases.

Keywords

nonequilibrium antiferromagnetic state heavy electron compound URu2Si2 uniaxial stress hidden order elastic neutron scattering

Cite

@article{arxiv.cond-mat/0207589,
  title  = {Nonequilibrium Antiferromagnetic State in the Heavy Electron Compound URu_2Si_2},
  author = {M. Yokoyama and J. Nozaki and H. Amitsuka and K. Watanabe and S. Kawarazaki and H. Yoshizawa and J. A. Mydosh},
  journal= {arXiv preprint arXiv:cond-mat/0207589},
  year   = {2007}
}

Comments

4 pages, 2 eps figures, To appear in proceedings of SCES 2002 (Krakow)

Nonequilibrium Antiferromagnetic State in the Heavy Electron Compound URu_2Si_2

Abstract

Keywords

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