کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1233754 | 968816 | 2011 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spin-Hamiltonian parameters and defect structure for the rhombic Dy3+ center in AgCl crystal
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Spin-Hamiltonian parameters and defect structure for the rhombic Dy3+ center in AgCl crystal Spin-Hamiltonian parameters and defect structure for the rhombic Dy3+ center in AgCl crystal](/preview/png/1233754.png)
چکیده انگلیسی
Based on the defect model that the rhombic Dy3+ center in AgCl crystal is formed by substitutional Dy3+ ion associated with two nearest Ag+ vacancies (VAg) along the ã1 1 0ã and ã1¯1¯0ã axes owing to charge compensation, the spin-Hamiltonian parameters (g factors gi and hyperfine structure constants 161Ai and 163Ai, where i = x, y, z) of this rhombic Dy3+ center are calculated from a diagonalization (of energy matrix) method. In the method, the Zeeman (or magnetic) and hyperfine interaction terms are attached to the classical Hamiltonian used in the calculation of crystal-field energy levels and a 66 Ã 66 energy matrix concerning this Hamiltonian is constructed by taking all the ground-term multiplets 6HJ (J = 15/2, 13/2, 11/2, 9/2, 7/2, 5/2) into account. The calculated results (g factors gi and average |A¯(161Dy3+)| and |A¯(163Dy3+)|) are in reasonable agreement with the experimental values. From the calculations, the above defect model of rhombic Dy3+ center is confirmed, the defect structure of this Dy3+ center (characterized by the displacement of Clâ ligand caused by VAg) is obtained and the components of hyperfine structure constants Ai(161Dy3+) and Ai(163Dy3+) are predicted. The results are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 78, Issue 1, January 2011, Pages 343-346
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 78, Issue 1, January 2011, Pages 343-346
نویسندگان
Zheng Wen-Chen, Yang Wei-Qing, Liu Hong-Gang, Su Ping,