Optical and dielectric studies on pure and Ni²⁺, Co²⁺ doped single crystals of bis thiourea cadmium chloride

Abstract

Good quality single crystals of Ni 2+ , Co2+ ions doped Bisthiourea Cadmium Chloride (BTCC) are some of the excellent and efficient non-linear optical materials grown from aqueous solution by slow evaporation method. The lattice parameters of the grown crystals are determined by single crystal X-ray analysis. UV spectral analyses on these samples reveal the improved transparency of the doped crystals ascertaining the inclusion of metal ion in the lattice. FTIR spectral analysis carried out on the materials confirm the presence of functional groups. Dielectric measurements reveal that the dielectric constant of pure and doped crystals decreases with increase of frequency.

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

“…Nonlinear optical (NLO) materials play an important role in optical communication, laser technology, frequency conversion and data storage technology [1][2][3][4][5][6]. Zeiler [7] first determined the crystal structure of lithium sulphate monohydrate (LSMH) without localization of hydrogen atoms, which was later confirmed by Larson et al [8].…”

Melaminium iodide monohydrate

“…For ferroelectric materials, see: Fu et al (2009) ;Hang et al (2009). For impedance studies, see: Uthrakumar et al (2008). Table 1 Hydrogen-bond geometry (Å , ).…”

“…The ribbons are interconnected by other hydrogen bonds that involve I -as well as by π-electron ring -π-electron ring interactions with the distance between the centroids of the neighbour melaminium rings (1-x,1-y,1-z) equal to 3.6597 (17) Dielectric studies (capacitance and dielectric loss measurements) were performed on powder samples which have been pressed into tablets with conducting carbon glue deposited on their faces. The automatic impedance TongHui2828 Analyzer has been used (Uthrakumar et al, 2008). In the measured temperature range from 80 to 450 K (m.p.…”

Growth of cerium(III)-doped ADP crystals and characterization studies

“…Several foreign metallic cations existing in the parent compounds with high valency and small radii will affect the whole growth process and enhance physical properties. Their effects are related with ionic radius, electric charge, and frequency of solvent exchange [7][8][9]. Such additives can have a marked effect on the growth rate of the crystal faces and thus on the properties of the crystal [10].…”