کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1480450 | 991462 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Calculations of the local structure and EPR parameters for Cu2 + ions in xMgO-(30 â x)Na2O-69B2O3 glasses at different composition x
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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: Calculations of the local structure and EPR parameters for Cu2 + ions in xMgO-(30 â x)Na2O-69B2O3 glasses at different composition x Calculations of the local structure and EPR parameters for Cu2 + ions in xMgO-(30 â x)Na2O-69B2O3 glasses at different composition x](/preview/png/1480450.png)
چکیده انگلیسی
The local structures and electron paramagnetic resonance (EPR) parameters as well as their composition (x) dependences for Cu2 + in xMgO·(30 â x)·Na2O·69B2O3(5 â¤Â x â¤Â 17 mol%) glasses are theoretically studied by analyzing these parameters for tetragonally elongated 3d9 complexes. The nonlinear variations of the EPR spectra with modifier MgO composition x can be ascribed to the approximately parabolic relationships between cubic field parameter Dq, orbital reduction factor k, local relative tetragonal elongation ratio Ï, core polarization constant κ and reduction factor H with x. The [CuO6]10 â complexes may experience the slight relative elongations of about 0.4% due to the Jahn-Teller effect. The theoretical d-d transition bands and EPR parameters for the various composition x are in good agreement with the observed results. The above composition dependences of the relevant quantities are illustrated as the modifications of the local crystal-fields and electronic states in the vicinity of the Cu2 + dopants with x.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 432, Part B, 15 January 2016, Pages 535-539
Journal: Journal of Non-Crystalline Solids - Volume 432, Part B, 15 January 2016, Pages 535-539
نویسندگان
Yong-Qiang Xu, Shao-Yi Wu, Min-Quan Kuang, Xian-Fen Hu, Chang-Chun Ding,