Pressure-Temperature Phase Diagram of Golden SmS

Keiichiro Imura; Kazuyuki Matsubayashi; Hiroyuki S. Suzuki; Noriyuki Kabeya; Kazuhiko Deguchi; Noriaki K. Sato

doi:10.1143/JPSJ.78.104602

Pressure-Temperature Phase Diagram of Golden SmS

Strongly Correlated Electrons 2015-05-14 v1

Authors: Keiichiro Imura , Kazuyuki Matsubayashi , Hiroyuki S. Suzuki , Noriyuki Kabeya , Kazuhiko Deguchi , Noriaki K. Sato

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Abstract

We measured the thermal expansion of the valence fluctuating phase of SmS (golden SmS) to construct a pressure vs temperature phase diagram. The obtained phase diagram is characterized by three lines. One is a crossover line that divides the paramagnetic phase into two regions. The other two lines correspond to a second-order Neel transition and a first-order Neel transition. The crossover line appears to emerge from a tricritical point that separates the first-order Neel transition from the second-order one. We argue that a valence jump occurs at the border of antiferromagnetism.

Keywords

golden SmS pressure-temperature phase diagram valence fluctuation Neel transition tricritical point antiferromagnetism

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@article{arxiv.0910.2297,
  title  = {Pressure-Temperature Phase Diagram of Golden SmS},
  author = {Keiichiro Imura and Kazuyuki Matsubayashi and Hiroyuki S. Suzuki and Noriyuki Kabeya and Kazuhiko Deguchi and Noriaki K. Sato},
  journal= {arXiv preprint arXiv:0910.2297},
  year   = {2015}
}

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5 pages, 5 figures

Pressure-Temperature Phase Diagram of Golden SmS

Abstract

Keywords

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