S. Aruna

Study of Optical, Electrical, and Magnetic Properties of Tetrakis Thiourea Nickel Chloride Single Crystals

Dark green transparent crystals of nickel thiourea chloride of dimension 8 × 4 × 3 mm3 are grown in a period of 45 days. Single crystal X-ray diffractometer (XRD) shows that the crystal belongs to body centered tetragonal symmetry class I4. The UV-Vis-NIR spectrum establishes the transmission range to be 300 nm to 2500 nm, with a sharp absorption peak at the red end of the visible region. Photoconductivity and dielectric studies are carried out and reported for the first time. The sample exhibits negative photoconductivity. The dielectric constant and dielectric loss decrease with increase in frequency. The magnetic moment was measured to be 2.9941 μ B .