Pressure-Temperature Phase Diagram of Golden SmS
Pressure-Temperature Phase Diagram of Golden SmS
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DOI：
10.1143/jpsj.78.104602
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发表时间：
2009-10-01
影响因子：
1.7
通讯作者：
Sato, Noriaki K.
中科院分区：
文献类型：
--
作者：
Imura, Keiichiro;Matsubayashi, Kazuyuki;Sato, Noriaki K.
我们测量了 SmS（金 SmS）价态波动相的热膨胀，以构建压力与温度相图。获得的相图由三条线来表征。一种是将顺磁相分为两个区域的交叉线。另外两条线对应于二阶尼尔跃迁和一阶尼尔跃迁。交叉线似乎从将一阶尼尔跃迁与二阶尼尔跃迁分开的三临界点出现。我们认为价态跃迁发生在反铁磁性的边界。
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 anti ferromagnetism.