کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10653590 | 1002894 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electronic structures and ferroelectric properties of ABi2Ta2O9 (A=Ca, Sr, and Ba)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electronic structures and ferroelectric properties of ABi2Ta2O9 (A=Ca, Sr, and Ba) Electronic structures and ferroelectric properties of ABi2Ta2O9 (A=Ca, Sr, and Ba)](/preview/png/10653590.png)
چکیده انگلیسی
The electronic structures of ABi2Ta2O9 (A=Ca, Sr, and Ba) were calculated by using first-principles under optimized structure. As the size of A-site cation decreases from that of Ba2+ to Ca2+, the band-gap between O 2p and Ta 5d increases from 2.0 to 2.9Â eV, which responses to the stronger orbital hybridizations between Ta 5d and O 2p orbits favoring improvement of the ferroelectric property, decrease in leakage current, and increase in both spontaneous polarization and Curie temperature by the structural distortion. In contrast to CaBi2Ta2O9 and SrBi2Ta2O9, the hybridization between Ba 5p orbits and O 2p orbits in BaBi2Ta2O9 has better structural stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 133, Issue 10, March 2005, Pages 663-666
Journal: Solid State Communications - Volume 133, Issue 10, March 2005, Pages 663-666
نویسندگان
Meng-Qiu Cai, Zhen Yin, Ming-Sheng Zhang,