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<strong>Spectroscopic studies of Cu2+ spin probe in sodium niobium based tellurite glasses</strong>
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dc |
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| Title Statement |
<strong>Spectroscopic studies of Cu2+ spin probe in sodium niobium based tellurite glasses</strong> |
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| Added Entry - Uncontrolled Name |
Babu, Jogu chinna; Osmania University |
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| Uncontrolled Index Term |
Material science, Glasses Tellurite glasses, ESR, IR, Raman and Optical absorption spectra |
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| Summary, etc. |
Differential scanning calorimetry (DSC), electron spin resonance (ESR), Raman, infrared (IR) and optical absorption studies on<strong> </strong>10Na<sub>2</sub>O-xNb<sub>2</sub>O<sub>5</sub>-(89-x)TeO<sub>2</sub>-1CuO glasses (where x =0, 5, 10, 15 and 20 mol%) containing Cu<sup>2+</sup> spin probe have been carried out. Glass transition temperature (<em>T<sub>g</sub></em>) and thermal stability of glass samples have been estimated from the DSC measurements and it has been found that both increase with increasing the Nb<sub>2</sub>O<sub>5</sub><em> </em>content<em>. </em>From Raman and IR spectra, it is clear that present glass system consists of structural units of TeO<sub>3</sub> (tp) and TeO<sub>4 </sub>(tbp) and NbO<sub>6 </sub>octahedra. Also, TeO<sub>4</sub> units convert into TeO<sub>3</sub> units with change in Nb<sub>2</sub>O<sub>5</sub> content. The hyperfine splittings in the parallel features of ESR spectra of Cu<sup>2+</sup> are recorded for all compositions. ESR results show that g<sub>|| ></sub> g indicating that the Cu<sup>2+</sup> ion is in tetragonal distorted octahedral site and its ground state is d<sub>x2- y2.</sub> There is considerable variation in Hamiltonian parameters for the different compositions. The observed optical absorption peak of Cu<sup>2+</sup> is found to be maximum at 780 nm for 10 mol% of Nb<sub>2</sub>O<sub>5</sub> content. Bonding parameters and % bonding symmetry are calculated from both optical and ESR data changing with increasing Nb<sub>2</sub>O<sub>5</sub> content. |
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| Publication, Distribution, Etc. |
Indian Journal of Pure & Applied Physics (IJPAP) 2016-05-20 09:07:56 |
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| Electronic Location and Access |
binary/octet-stream http://op.niscair.res.in/index.php/IJPAP/article/view/4398 |
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| Data Source Entry |
Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 54, ##issue.no## 5 (2016): Indian Journal of Pure & Applied Physics |
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| Language Note |
en |
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| Nonspecific Relationship Entry |
http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9368 http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9369 http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9370 http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9371 http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9372 http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9373 http://op.niscair.res.in/index.php/IJPAP/article/download/4398/9374 |
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