Refractive index,band gap energy,dielectric constant and polarizability calculations of ferroelectric Ethylenediaminium Tetrachlorozincate crystal |
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| Institution: | 1. PG & Research Department of Physics, Sri Paramakalyani College, Alwarkurichi 627 412, India;2. Department of Physics, Sun College of Engineering and Technology, Nagercoil 629 902, India;1. Department of Physics, Saint-Petersburg State University, Ulianovskaja 3, 198504 St. Petersburg, Russia;2. Faculty of Chemistry, University of Wroclaw, Joliot Curie 14, 50-383 Wroclaw, Poland;1. Department of Physics, St. Petersburg State University, 199034 St. Petersburg, Russia;2. ITMO University, 197101 St. Petersburg, Russia;3. Institute of Modern Physics, 730000 Lanzhou, China;4. GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany;5. Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany;6. Helmholtz-Institut Jena, D-07743 Jena, Germany;7. IOQ, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany;8. Center for Advanced Studies, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia;1. Physics Department, Faculty of Arts and Sciences, Aksaray University, Campus 68100 Aksaray, Turkey;2. Physics Department, Faculty of Sciences, Selcuk University, Campus 42031 Konya, Turkey;1. Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK;2. Department of Physics, University of Warwick, Coventry CV4 7AL, UK;3. Paintbox Limited, 36-44 Melchett Road, Birmingham B30 3HS, UK;1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan, 430074, China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China |
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| Abstract: | Single crystal of Ethylenediaminium Tetrachlorozincate has been grown by slow evaporation method. The single crystal XRD study confirms the orthorhombic structure of the crystal. The presence of functional group vibrations are ascertained through FTIR and Raman studies. In optical studies, the insulating behaviour of the material is established by Tauc plot. The refractive index and the real dielectric constant of the crystal are calculated. The electronic polarizability in the high frequency optical region is also calculated from the dielectric constant values by using the Clausius–Mossotti equation. The large value of dielectric constant is identified through dielectric studies and it points to the ferroelectric behaviour of the material. Further an experimental study confirms the ferroelectric behaviour of the material. The total polarizability of the crystal owing to the space charge, dipole, ionic and electronic polarizability contributions is obtained experimentally, and it matches well with the theoretically obtained value from Penn analysis. Further, Plasmon energy and Fermi energy of the material are also calculated using Penn analysis. |
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| Keywords: | Crystal growth Dielectric properties Ferroelectricity Optical properties |
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