کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5376357 | 1504324 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Theoretical study of local structure of tetragonal Fe3+ center in layered perovskite Rb2ZnF4 and Rb2CdF4
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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: Theoretical study of local structure of tetragonal Fe3+ center in layered perovskite Rb2ZnF4 and Rb2CdF4 Theoretical study of local structure of tetragonal Fe3+ center in layered perovskite Rb2ZnF4 and Rb2CdF4](/preview/png/5376357.png)
چکیده انگلیسی
The electron paramagnetic resonance spectra of layered perovskite Rb2ZnF4 and Rb2CdF4 doped with Fe3+ are studied by means of a 252 Ã 252 complete energy matrix for a 3d5 configuration ion in a tetragonal ligand-field. The local structure parameters R⥠and R⥠for Rb2ZnF4:Fe3+ and Rb2CdF4:Fe3+ systems are determined. The calculations show that the local lattice of the Rb2ZnF4:Fe3+ and Rb2CdF4:Fe3+ systems display a compression distortion relative to the regular octahedron. Besides, the value of R⥠in Rb2ZnF4 and Rb2CdF4 crystals is, respectively, larger than that in Rb2ZnF4:Fe3+ and Rb2CdF4:Fe3+ systems. This may be ascribed to the fact that Fe3+ ions have the smaller ionic radius and larger charge in comparison to Zn2+ and Cd2+ ions. In the end, the relative curves of 104b20 vs. ÎR (ÎR = Râ¥Â â Râ¥) for these two systems are plotted which satisfy an approximately linear relation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 334, Issues 1â3, 20 April 2007, Pages 175-179
Journal: Chemical Physics - Volume 334, Issues 1â3, 20 April 2007, Pages 175-179
نویسندگان
Duan Mei-Ling, Kuang Xiao-Yu, Li Jin-Hong, Jiao Zhao-Yong, Xiong Yang,