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 |