A Study on Structural, Optical, Electrical and Etching Characteristics of Pure and L-Alanine Doped Potassium Dihydrogen Phosphate Crystals
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Abstract
Pure potassium dihydrogen phosphate (KDP) crystals and KDP doped with L-alanine have been grown by slow evaporation technique at room temperature. Grown crystals have been characterized using powder X-ray diffraction, (XRD), Energy Dispersive X-ray spectroscopy (EDX) and Fourier Transform Infrared spectroscopy (FTIR). The presence of L-alanine into pure KDP crystal was confirmed by FTIR and EDX spectra. Crystal structure has been studied by XRD. Pure KDP and L-alanine doped KDP crystals both possessed tetragonal structure. The transparency is found to increase with the increase of doping concentrations of the grown crystals as observed by UV-Vis spectra. A.C. electrical conductivity of grown crystals along the growth axis was carried out at various temperatures ranging from 35?C - 400?C. Dielectric constant and dielectric losses are measured as a function of temperature and this study reveals the contribution of space charge polarization. Crystal defects and surface morphology are studied by dissolution solvent technique and reveals the step growth mechanism for both pure and doped crystals.
- X. Sun, X. Xu, Z. Gao, Y. Fu, S. Wang, H. Zeng and Y. Li, “Effect of EDTA on the Light Scatter in KDP Crys-tals,” Journal of Crystal Growth, Vol. 217, 2000, pp. 404-409.
- N. Zaitseva, L. Carman, and I. Smolsky, “Habit Control during Rapid Growth of KDP and DKDP Crystals,” Journal of Crystal Growth, Vol. 241, No. 3, 2002, pp. 363-373. doi:10.1016/S0022-0248(02)01244-7
- R. W. G. Wyckoff, “Crystal Structure,” 2nd Edition, In-terscience, New York, 1960.
- J. Podder, “The Study of Impurities Effect on the Growth and Nucleation Kinetics of Potassium Dihydrogen Phos-phate,” Journal of Crystal Growth, Vol. 237-239, 2002, pp. 70-75. doi:10.1016/S0022-0248(01)01854-1
- G. G. Muley, M. N. Rode and B. H. Pawar, “FT-IR, Thermal and NLO Studies on Amino Acid (L-Arginine and L-Alanine) Doped KDP Crystals,” Acta Physica Po-lonica A, Vol. 116, 2009, pp. 1033-1038.
- B. Suresh Kumar and K. Rajendra Babu, “Effect of L-Arginine, L-Histidine and Glycine on the Growth of KDP Single Crystals and Their Characterization,” Indian Journal of Pure and Applied Physics, Vol. 46, No. 2, 2008, pp. 123-126.
- S. Gunasekaran and G. R. Ramkumaar, “Analysis on Suitability of Pure and α-Histidine Doped KDP Crystals in High Speed Applications,” Indian Journal of Physics, Vol. 83, No. 11, 2009, pp. 1549-1555. doi:10.1007/s12648-009-0138-4
- K. D. Parikh, D. J. Dave, B. B. Parekh and M. J. Joshi, “Growth and Characterization of L-Alanine Doped KDP Crystals,” Crystal Research and Technology, Vol. 45, No. 6, 2010, pp. 603-610. doi:10.1002/crat.201000019
- M. Priya, C. M. Padma, T. H. Freeda, C. Mahadevan and C. Balasingh, “Electrical Conductivity Measurements on Gel Grown KDP Crystals Added with Urea and Thiou-rea,” Bulletin of Material Science, Vol. 24, No. 5, 2001, pp. 511-514. doi:10.1007/BF02706723
- P. Kumaresan, S. Moorthy Babu and P. M. Anbarasan “Influence of Dopants (L-Glutamic Acid, L-Histidine and L-Valine) on the Performance of KDP Crystals,” 4th DAE-BRNS Laser Symposium, Vol. 4, 2005, pp. 521-522.
- P. Kumaresan, B. S. Moorthy Babu and P. M. Anbarasan, “Thermal Dielectric Studies on Pure and Amino Acid (L-Glutamine, L-Histadine, L-Valine) Doped KDP Single Crystals,” Optical Materials, Vol. 30, No. 9, 2001-1368. doi:10.1016/j.optmat.2007.07.002
- K. D. Parikh, D. J. Dave, B. B. Parekh and M. J. Joshi, “Thermal, FT-IR and SHG Efficiency Studies of L-Arginine Doped KDP Crystals,” Bulletin of Material Science, Vol. 30, No. 2, 2007, pp. 105-112. doi:10.1007/s12034-007-0019-4