کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1620465 | 1005735 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
EPR and optical absorption studies of Cu2+ ions doped magnesium citrate decahydrate single crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
X-band electron paramagnetic resonance (EPR) studies of Cu2+ ions in magnesium citrate decahydrate single crystals are done at room temperature. Detailed EPR analysis indicates the presence of only one Cu2+ site. Cu2+ is found to take up substitutional position at Mg site. The angular variation of the EPR spectra in three planes a*b, bc and ca* are used to determine principal g and A tensors. The spin Hamiltonian parameters are: gx = 2.0346, gy = 2.1400, gz = 2.3874, Ax = 57, Ay = 76, Az = 99 (Ã10â4) cmâ1. The optical absorption study is also carried out at room temperature and absorption bands are assigned to various transitions. The theoretical band positions are estimated using energy expressions and a good agreement is obtained with the experimental values. By correlating EPR and optical data, different molecular orbital coefficients are evaluated and the nature of bonding in the complex is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 499, Issue 1, 4 June 2010, Pages 17-22
Journal: Journal of Alloys and Compounds - Volume 499, Issue 1, 4 June 2010, Pages 17-22
نویسندگان
Prashant Dwivedi, Ram Kripal, Madan Gopal Misra,