کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7920337 | 1511489 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Vibrational and elastic properties of silicate spinels A2SiO4 (A = Mg, Fe, Ni, and Co)
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
A six-parameter bond-bending force constant model is used to calculate the zone-center (Îâ¯=â¯0) Raman and infrared phonon mode frequencies, elastic constants and related properties, the Debye temperatures, and sound velocities along high-symmetry directions for A2SiO4 (Aâ¯=â¯Mg, Fe, Ni, and Co) spinels. The main outcomes of the calculations are that the interactions between Si and O atoms (first-neighbor interaction) are stronger than those between A and Oatoms (Aâ¯=â¯Mg, Fe, Ni, and Co) (second-neighbor interaction). The elastic constants C11, C12, and C44 decrease in the order Mgâ¯>â¯Feâ¯>â¯Niâ¯>â¯Co. The calculated bulk modulus, Poisson's ratio, and anisotropy decrease in the sequence Fe2SiO4 â Ni2SiO4 â Co2SiO4 â Mg2SiO4. On comparison, we find overall good agreement with the available experimental and previously calculated data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 117, June 2018, Pages 167-172
Journal: Journal of Physics and Chemistry of Solids - Volume 117, June 2018, Pages 167-172
نویسندگان
A.K. Kushwaha, C.-G. Ma, M.G. Brik, S. Akbudak,