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Nucleation kinetics, optical, dielectric, piezoelectric and NLO properties of KADP (85:15) mixed crystals

G. IYAPPAN1, P. RAJESH1,* , P. RAMASAMY1

Affiliation

  1. Department of Physics, SSN College of Engineering, Kalavakkam, Tamil Nadu, India

Abstract

In the present work, mixed crystals of KADP (85:15) have been grown at 45 ºC using solution growth. The growth parameters such as solubility, metastable zone width and induction period are determined experimentally. Nucleation parameters such as critical radius, interfacial tension and critical free energy of the mixed crystals are calculated. The UV-Visible spectrum shows that the mixed crystal has good optical transmission in the entire visible and near IR region. The dielectric measurements are used to analyse dielectric constant and dielectric loss of the mixed crystal. The nonlinear optical property of the grown crystal has been confirmed by the Kurtz powder technique and second harmonic generation efficiency is found to be 1.5 times that of potassium dihydrogen phosphate (KDP) crystal. Photoconductivity study shows the positive photo conducting nature of the crystal. Higher piezoelectric coefficient has been observed in mixed crystals..

Keywords

Solubility, Solution growth, NLO materials.

Citation

G. IYAPPAN, P. RAJESH, P. RAMASAMY, Nucleation kinetics, optical, dielectric, piezoelectric and NLO properties of KADP (85:15) mixed crystals, Optoelectronics and Advanced Materials - Rapid Communications, 13, 3-4, March-April 2019, pp.217-223 (2019).

Submitted at: June 16, 2018

Accepted at: April 8, 2019