Effect of simultaneous organic and inorganic dopants on the characteristics of triglycine sulfate (TGS) crystals

Effects of L-alanine+nickel and L-alanine+chromium are investigated on the dielectric and pyroelectric properties of TGS crystals. The crystals were grown by temperature lowering technique. Dielectric constant and pyroelectric coefficient measurements of these crystals are reported and compared with pure and L-alanine doped crystals. TGS crystals doped with chromium plus L-alanine and nickel plus L-alanine exhibit two to three times better materials figures of merit for pyroelectric infrared detectors over pure TGS crystals and L-alanine doped crystal. The Vicker's hardness of CrLATGS crystal was found to be two times of pure TGS crystals. Growth characteristics of these crystals are also presented.