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Ferroelectric material with high dielectric constant of Ba0.5Sr0.5TiO3 is synthesized through Solid State Reaction and fraction of Lanthanum is substituted to introduce hole concentration. XRay Diffraction shows all the samples are stabilized in cubic crystal structure. With La doped samples the Cole-Cole plot is modified and AC conductivity increases at higher temperatures as well as higher frequencies compared to undoped sample. [ABSTRACT FROM AUTHOR]

Single crystals of mercury cadmium chloride thiocyanate [Hg3CdCl2(SCN)6; (MCCTC)] were grown from ethanol solvent using slow solvent evaporation technique for the first time. The cell parameters of the grown crystals of MCCTC were confirmed by single crystal X-ray diffraction technique. The various functional groups of resulting compound were well-identified using FT-IR analysis. The UV-Vis-NIR studies revealed that the ultra violet cut off wavelength lies at 270 nm. It is also interesting to note that the sample exhibited wide range of optical transparency from 270 to 2000 nm in ethanol solution, which might be due to the incorporation of the halogen ion (Cl-) in the grown crystal of MCCTC. The second harmonic generation efficiency of MCCTC is found to be superior (about seventeen times) to KDP and (about three times) urea. TGA-DTA and DSC analysis showed that the thermal stability of the sample is retained up to 171.3°C above which phase change occurred from HgCdCl2(SCN)6 to CdHg(SCN)4 with other fragments. The latent heat of the sample is found to be 0.7652 J/Kg. [ABSTRACT FROM AUTHOR]

Combining the optical transparency together with greater nonlinearity and thermal stability is a challenge to people who have thirst to design new category NLO materials. In the present work, an optically transparent prism shaped Urea-L-tartaric acid (ULTA) single crystals were grown using simple slow evaporation technique. The cell parameters of the grown crystals were determined by SXRD. The crystalline samples of ULTA were subjected to UV-Vis-NIR and thermal analysis. The optical studies established the transparency range of the ULTA crystal from 250 nm to 2000 nm except a predominant peak observed at 1989 nm. The melting point of the sample is found to be 209.38 °C, which is far greater than Urea (132°C), UDTA (96.3°C). The refractive index calculation was also made and reported. [ABSTRACT FROM AUTHOR]

Ferroelectric material with high dielectric constant of Ba0.5Sr0.5TiO3 is synthesized through Solid State Reaction and fraction of Lanthanum is substituted to introduce hole concentration. XRay Diffraction shows all the samples are stabilized in cubic crystal structure. With La doped samples the Cole-Cole plot is modified and AC conductivity increases at higher temperatures as well as higher frequencies compared to undoped sample. [ABSTRACT FROM AUTHOR]