کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10714021 | 1025564 | 2012 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectral studies on Cu2+ ions in sodium-lead borophosphate glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Electron Paramagnetic Resonance (EPR) and optical absorption spectra of Cu2+ ions in sodium-lead borophosphate glasses doped with different concentrations of Cu2+ ions have been studied. EPR spectra of all the glass samples exhibit resonance signals characteristic of Cu2+ ions. The values of spin-Hamiltonian parameters indicate that the Cu2+ ions in sodium-lead borophosphate glasses are present in octahedral sites with tetragonal distortion. The optical absorption spectra of all the glass samples show a single broad band, which has been assigned to the 2B1gâ2B2g transition of Cu2+ ions. The optical band gap energy (Eopt) and Urbach energy (ÎE) are calculated from their ultraviolet absorption edges. The emission bands observed in the ultraviolet and blue region are attributed to 3d94sâ3d10 triplet transition in Cu+ ion. The FT-IR spectra show that the glass system contains BO3, BO4 and PO4 structural units.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 407, Issue 24, 15 December 2012, Pages 4741-4748
Journal: Physica B: Condensed Matter - Volume 407, Issue 24, 15 December 2012, Pages 4741-4748
نویسندگان
K. Srinivasulu, I. Omkaram, H. Obeid, A.Suresh Kumar, J.L. Rao,