کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5376880 | 1504331 | 2006 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on the local structures of the substitutional and interstitial Ni3+ centers in rutile
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Studies on the local structures of the substitutional and interstitial Ni3+ centers in rutile Studies on the local structures of the substitutional and interstitial Ni3+ centers in rutile](/preview/png/5376880.png)
چکیده انگلیسی
The local structures of the two rhombic Ni3+ centers (on the substitutional and interstitial sites) in rutile (TiO2) are theoretically studied from the perturbation formulas of the g factors for a 3d7 ion of low spin (S = 1/2) in rhombically distorted octahedra. In these formulas, the contributions to the g factors from the low symmetrical parts of the crystal-fields as well as the spin-orbit coupling interaction and orbitals of the ligands are taken into account. From the investigations, the ligand octahedron in the substitutional Ni3+ center may suffer a slightly larger axial elongation (characterized by the axial distortion angle Îαs â â 1.09°) than that (ÎαsHâ-0.73°) in the host and the much smaller perpendicular distortion (characterized by the rhombic distortion angle Îθs â â 0.75°) than that (ÎθsHâ-9.0°) in the host due to the Jahn-Teller effect. For the interstitial Ni3+ center, the ligand octahedron is found to undergo a smaller compression (characterized by the axial distortion angle Îαi â 1.48°) than that (ÎαiHâ8.17°) in the host and a slighter rhombic distortion (Îθi â 0.1°) than that (ÎθiHâ7.0°) in the host due to the Jahn-Teller effect. The calculated g factors based on the above structural parameters show better agreement than those based on the host structural parameters and those in absence of the spin-orbit coupling and the orbitals of the ligands with the experimentally observed values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 328, Issues 1â3, 29 September 2006, Pages 26-32
Journal: Chemical Physics - Volume 328, Issues 1â3, 29 September 2006, Pages 26-32
نویسندگان
Shao-Yi Wu, Xiu-Ying Gao, Ji-Zi Lin, Qiang Fu, Guang-Duo Lu,