کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1525842 | 1511847 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Valence-electron structure and spontaneous polarization of KNbO3 in tetragonal ferroelectric phase
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
The valence-electron structure (VES) of potassium niobate (KNbO3) in tetragonal phase was calculated based on the empirical electron theory (EET). The mixture of ionicity and covalency is embodied by the number of valence electrons. This property is very common for perovskite ferroelectrics. Using the VES obtained, the spontaneous polarization was investigated in the ferroelectric phase after the determination of the atomic effective valence electrons. The value of the spontaneous polarization is 31 C m−2, which was compared with other theoretical and experimental values. All of above results demonstrate that the EET is an alternative method for studying the ferroelectric properties of materials, which is effective and simple.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 114, Issues 2–3, 15 April 2009, Pages 728–731
Journal: Materials Chemistry and Physics - Volume 114, Issues 2–3, 15 April 2009, Pages 728–731
نویسندگان
Xinjian Yang, Shichun Li, Hong Li,