Urbach's Rule in Undoped and Co Doped (80-x)Sb2O3-20Na2O-xWO3 Glasses
P. Petkovaa, M.T. Soltanib, S. Petkova and V. Nedkova
aShumen University "Konstantin Preslavsky", 115 Universitetska str., 9712 Shumen, Bulgaria
bDepartment of Physics, Faculty of Sciences and Engineering Sciences, University of Biskra, Algeria
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We have analyzed the Co influence on the absorption spectra of (80-x)Sb2O3-20Na2O-xWO3 glasses in the Urbach rule region at room temperature. We present the comparison between Co and WO3 manifestation in the spectral region 2.64-3.14 eV. The spectral characteristics of "crystalline" and "glassy" Urbach's rule are also calculated.
DOI: 10.12693/APhysPolA.121.152
PACS numbers: 42.70.Ce, 78.20.Ci, 78.30.-j