Comparative study on BIS thiourea cadmium acetate crystals using HRXRD, etching, microhardness, UV–visible and dielectric characterizations

Effect of l-alanine, Mn(II) and glycine dopants on the structural, crystalline perfection, second harmonic generation (SHG), dielectric and mechanical properties of BTCA single crystals

“…The lower UV cut off wavelength at w230 nm was observed in all the crystals. From figure, it can be clearly seen that the crystal grown with Gly doping have higher transmittance than the other doped crystals as well as pure BTCA [7]. This may be due to the maximum crystalline perfection of BTCA crystal for this particular doping as observed by HRXRD analysis, which may also be the reasons for this specimen to become higher second harmonic generation efficient.…”

“…The crystallization perfection, etching, microhardness, UVeVis. and dielectric characterization on pure BTCA crystal is reported in our previous paper [7]. As per the authors knowledge there is no report available in the literature on the effect of L-alanine, Mn(II) and glycine (Gly) on the structural and physical properties of BTCA crystals.…”

“…The synthesis of BTCA was successfully done by using commercially available AR grade thiourea and cadmium acetate substances in the stoichiometric ratio 2:1 as per the previous reports [7,23] with the following reaction:…”

“…The lattice parameters for all the specimens remain almost same and contribute to the constant cell volume as given in Table 1. The lattice parameters for all the doped specimens were calculated using CHECKCELL software and are provided in Table 1 indicate that all the grown crystals belong to the same crystal structure [7] which clearly depict that doping does not affect the structure of the crystal but only morphology. All the peaks are present corresponding to the reported data and no other phase was present which is clearly observed from the PXRD patterns of the specimens where the intensity for the particular planes of (131) increased with doping which is maximum for Gly doped specimen.…”

“…For the metallic part, the focus is on group IIB materials (Zn, Cd, and Hg) as these compounds have a high SHG efficiency because the metal center is engaged in p-bonding with the organic ligating groups [4,5]. Metaleorganic complex crystals have over the years been subjected to extensive investigation by several researchers for their wide variety of properties [6,7]. Among these complexes, Bis thiourea cadmium acetate (BTCA) is the simplest NLO crystal whose SHG efficiency is superior to KDP crystal [8].…”