کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7904266 | 1510661 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ab initio study of fundamental properties of XAlO3 (XÂ =Â Cs, Rb and K) compounds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The structural, electronic, magnetic and optical properties of suggested XAlO3 (XÂ =Â Cs, Rb and K) perovskites under pressure effects are investigated by means of the first-principles calculations with the technique of the Full Potential Linearly Augmented Plane Wave (FP-LAPW) implemented within Wien2k computer package. The electronic exchange correlation energy is determined by using Generalized Gradient Approximation together with Spin-Orbit Interaction (GGAÂ +Â SOI). The lattice constant, bulk modulus and its pressure derivative are calculated. Half-metallicity was preserved at ranges of 4.03-4.19Â Ã
, 4.03-4.18Â Ã
and 3.74-4.09Â Ã
for the CsAlO3, RbAlO3 and KAlO3 compounds, respectively. The largest spin-flip gaps are found in the spin up channel, corresponding to a magnetic moment of 2 μB/f.u. Optical properties are also studied. Dielectric function, refractive index, and loss energy are calculated and discussed. The present work presents the first theoretical study of the perovskites of interest and still awaits experimental confirmations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Science: Advanced Materials and Devices - Volume 3, Issue 2, June 2018, Pages 254-261
Journal: Journal of Science: Advanced Materials and Devices - Volume 3, Issue 2, June 2018, Pages 254-261
نویسندگان
Saadi Berri,