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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46437819 |
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Table of Contents:
- Effect of Nd3+ Concentration on the Physical and Absorption Properties of Sodium-Lead-Borate Glasses S. Mohan K. S. Thind G. Sharma Física, Astronomía y Matemáticas Judd Glasses Ofelt theory Optical materials Optical properties The effect of increasing the rare earth ion concentration on the physical and spectroscopic properties ofNd3+ doped sodium-lead-borate glasses have been studied for the compositions (10-x) Na2O30PbO60B2O3xNd2O3, where x = 1.00, 1.25, 1.50, 1.75 and 2.00 mol %. Optical band gaps, cut-off wavelengths and variousspectroscopic parameters (E1, E2, E3, F2, F4, F6 and x4 f ) have been determined from the room temperatureabsorption spectra. Judd-Ofelt theory has been employed to determine the intensity parameters W2, W4 andW6which in turn are used to evaluate radiative transition probability (A), branching ratio (b) and radiative lifetime(tR) for the fluorescent level 4F3=2. The W2 parameter and hence the non-symmetric component of electricfield acting on Nd3+ ion is found to be highest for glass with 1.75 mol% of Nd2O3. Because of the poor resolutionof hypersensitive transition, the covalency of the Nd-O bond has been characterized by the relative intensityof 4I9=2 !4F7=2, 4S3=2. The highest covalency has been predicted for glass with 2 mol% Nd2O3. The radiativeproperties are found to improve with an increase in concentration of Nd2O3 for the present study 2007 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46437819 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4 Vol.37