کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1497547 | 1510800 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigations on the local structures of Cr3+(3d3) and Nd3+(4f3) ions at the trigonal Bi3+ sites in Bi4Ge3O12
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigations on the local structures of Cr3+(3d3) and Nd3+(4f3) ions at the trigonal Bi3+ sites in Bi4Ge3O12 Investigations on the local structures of Cr3+(3d3) and Nd3+(4f3) ions at the trigonal Bi3+ sites in Bi4Ge3O12](/preview/png/1497547.png)
چکیده انگلیسی
The local structures of Cr3+(3d3) and Nd3+(4f3) ions at the trigonal Bi3+ sites in Bi4Ge3O12 (BGO) are theoretically studied by using the perturbation formulas of the EPR parameters for a 3d3 or 4f3 ion in trigonally-distorted octahedra. Based on the studies, we find that the impurity Cr3+ does not occupy exactly the host Bi3+ site but undergoes an off-center displacement ΔZCr (≈0.17 Å) towards the center of the oxygen octahedron along the C3 axis, whereas the Nd3+ suffers another outward shift ΔZNd (≈−0.08 Å) away from the center of the octahedron. The calculated EPR parameters based on the above displacements show reasonable agreement with the observed values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 28, Issues 8–9, June 2006, Pages 1095–1100
Journal: Optical Materials - Volume 28, Issues 8–9, June 2006, Pages 1095–1100
نویسندگان
Shao-Yi Wu, Hui-Ning Dong,