کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1527457 | 1511859 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electron paramagnetic resonance and optical absorption studies of Cu2+ ion doped polyvinyl alcohol films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Electron paramagnetic resonance (EPR) and optical absorption studies have been carried out on Cu2+ ions doped in polyvinyl alcohol films (PVA). EPR spectrum at room temperature exhibits hyperfine structure characteristic of Cu2+ ions in tetragonal symmetry. The EPR spectra have also been recorded at various temperatures. The number of spins participating in the resonance is measured as a function of temperature and the activation energy is calculated. The paramagnetic susceptibility (Ï) is calculated from the EPR data at various temperatures and the Curie constant is evaluated from 1/Ï versus T graph. The optical absorption spectrum exhibits a broad band which has been assigned to the transition 2B1g â 2B2g.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 101, Issues 2â3, 15 February 2007, Pages 423-427
Journal: Materials Chemistry and Physics - Volume 101, Issues 2â3, 15 February 2007, Pages 423-427
نویسندگان
Ch. Linga Raju, J.L. Rao, N.O. Gopal, B.C.V. Reddy,