Optical, dielectric and ferroelectric behaviour on doped lithium sulphate crystals
| Autor: | Sreenath Krishnan, V. Joseph, P. S. Latha Mageshwari, S. Jerome Das, R. Priya |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Dopant Analytical chemistry Physics::Optics Crystal growth Dielectric Ferroelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Crystal Condensed Matter::Materials Science Condensed Matter::Superconductivity X-ray crystallography Electrical and Electronic Engineering Fourier transform infrared spectroscopy Single crystal |
| Zdroj: | Optik. 125:2289-2294 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2013.10.121 |
| Popis: | Optically transparent single crystals of urea doped with lithium sulphate (ULS), thiourea doped with lithium sulphate (TLS) and cupric chloride doped with lithium sulphate (CuLS) were grown in aqueous solution by slow evaporation technique at room temperature. Single crystal X-ray diffraction analysis confirmed the changes in the lattice parameters of the ULS, TLS and CuLS. The lattice parameters and the quality of doped crystals were confirmed by powder X-ray diffraction studies. The functional groups present in the ULS, TLS and CuLS crystals were determined qualitatively by using Fourier transform infrared (FTIR) spectroscopy. Optical absorption studies revealed that doped crystals acquire very low absorption in the entire visible region. The energy dispersive X-ray analysis (EDAX) gives the chemical composition of the grown crystal. CHN analysis confirmed the presence of carbon, hydrogen and nitrogen in the added dopants. The dielectric constant and dielectric loss of the doped crystal were studied as a function of frequency and temperature and the ferroelectric property of the crystal was confirmed by dielectric studies. |
| Databáze: | OpenAIRE |
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