Structural studies of tellurite glasses doped with erbium ions
| Autor: | Edmund Golis, Katarzyna Pach, El Sayed Yousef, Maciej Sitarz, Jacek Filipecki |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_element
02 engineering and technology Condensed Matter::Disordered Systems and Neural Networks 01 natural sciences Analytical Chemistry Inorganic Chemistry Erbium symbols.namesake Positron 0103 physical sciences Ceramic Spectroscopy 010302 applied physics chemistry.chemical_classification Organic Chemistry Doping Polymer 021001 nanoscience & nanotechnology Amorphous solid chemistry visual_art symbols visual_art.visual_art_medium Physical chemistry 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Molecular Structure. 1164:328-333 |
| ISSN: | 0022-2860 |
| DOI: | 10.1016/j.molstruc.2018.03.071 |
| Popis: | The materials under investigation were the tellurite glasses. Basic glasses and glasses doped with erbium Er3+ ions were examined. The positron lifetime measurement method PALS (Positron Annihilation Lifetime Spectroscopy) and the Raman spectroscopy were applied in order to analyse their structural properties. The proposed PALS method allows to identify structural defects in amorphous materials (glasses, ceramics and polymers) that are difficult to detect with the use of other traditional measuring methods. The conducted studies revealed two positron lifetime components τ1 and τ2. On the basis of the two-state model, positron capture parameters were calculated, which allowed to draw conclusions concerning the nature and degree of defects of the examined tellurite glasses. Application of the Raman spectroscopy resulted in assessment of the effect of Er3+ on the structure of the examined material. |
| Databáze: | OpenAIRE |
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