کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10714151 | 1025571 | 2012 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural relative stabilities and pressure-induced phase transitions for lanthanide trihydrides REH3 (RE=Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu)
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The structures, structural relative stabilities, pressure-induced phase transitions, and equations of state for lanthanide trihydrides REH3 (RE=Sm, Gd, Tb, Dy, Ho, Er, Tm, and Lu) are systematically studied using ab initio calculations under a core state model (CSM). The obtained ground-state parameters, such as lattice constants and bulk modulus, agree well with the available data. Among the P63/mm, P3Ìc1, and P63cm structures, the P63cm structure is found to be the most stable structure for lanthanide trihydride via the comparison of the calculated total energies. With the help of Birch-Murnaghan equation of state, the structural transitions from hexagonal to cubic for REH3 (RE=Sm, Gd, Ho, Er, and Lu) under pressure are affirmed; especially, the similar behavior of REH3 (RE= Tb, Dy, and Tm) is reasonably predicted for the first time by this means. For the transitions, the repulsive interactions of H-H atoms may play an important role in terms of the analysis of the structures in the vicinity of the theoretical phase transition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 407, Issue 12, 15 June 2012, Pages 2050-2057
Journal: Physica B: Condensed Matter - Volume 407, Issue 12, 15 June 2012, Pages 2050-2057
نویسندگان
Bo Kong, Lin Zhang, Xiang-Rong Chen, Ti-Xian Zeng, Ling-Cang Cai,