کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1402869 | 1501762 | 2013 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: High pressure phase transition in samarium monochalcogenides SmX (X = S, Se, Te) and their alloy SmS1−xSex High pressure phase transition in samarium monochalcogenides SmX (X = S, Se, Te) and their alloy SmS1−xSex](/preview/png/1402869.png)
• We have investigated the high pressure structural phase transition of SmS and its SmS1−xSex alloy.
• A modified model IIPM (including the polarizability effect) has been developed.
• Phase transition pressures are associated with a sudden collapse in volume.
• Our model is able to explain Cauchy violations.
• We have extended our study to elastic and mechanical properties of SmX (X = S, Se, Te).
Phase transition pressures, relative volume changes, elastic and thermophysical properties of Samarium monochalcogenides SmX (X = S, Se, Te) have been studied. An improved interaction potential model has been developed which includes Coulomb, three-body interaction, polarizability effect and overlap repulsive interaction operative up to second neighbor ions. In addition, we have investigated the phase transition pressure and associated volume collapse in SmS1−xSex alloy (0 ⩽ x ⩽ 1) which shows transition from discontinuous to continuous as x is reduces. The present results are in general in good agreement with experimental data available for the end point members (x = 0 and x = 1). The results for the alloy counter parts are also in fair agreement with experimental data generated from the vegard’s law.
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Journal: Journal of Molecular Structure - Volume 1052, 25 November 2013, Pages 204–213