Phase Transformation of the Monochalcogenides SmX (X = S, Se, Te)
Phase Transformation of the Monochalcogenides SmX (X = S, Se, Te)
复制标题
DOI：
10.1016/0925-8388(95)01629-5
复制
发表时间：
1995-08
影响因子：
4.6
通讯作者：
O. Vogt;L. Tristan;Darracq Stephane;S. Heathman;Benedict Ulrich gottfried;K. Mattenberger
中科院分区：
文献类型：
--
作者：
O. Vogt;L. Tristan;Darracq Stephane;S. Heathman;Benedict Ulrich gottfried;K. Mattenberger
利用能量色散x射线衍射技术和同步辐射研究了钐单硫族化合物（SmS、SmSe和SmTe）在55 GPa压力下的高压行为。SmTe和SmSe分别在5 GPa和7 GPa附近表现出异常的体积变化。SmS在低压下（小于1.8 GPa）表现出相变，保留了相同的立方结构，但经历了相当大的体积崩塌和颜色变化。SmS和SmSe在高压下都表现出从NaCl-型到cscl型的相变，这是以前没有观察到的。
The high-pressure behaviour of the monochalcogenides of samarium (SmS, SmSe and SmTe) was investigated up to pressures of 55 GPa using the energy dispersive X-ray diffraction technique and synchrotron radiation. SmTe and SmSe show abnormal volume changes around 5 and 7 GPa respectively. SmS shows a phase transformation at low pressure (less than 1.8 GPa), retaining the same cubic structure, but undergoing a considerable volume collapse and a change of colour. SmS and SmSe both exhibit a phase transition from NaCl- to CsCl-type structure at high pressure, which has not been observed previously.