Effect of added impurities on the electrical properties of L-arginine acetate single crystals

By M. Meena and C.K. Mahadevan 


L-arginine acetate (LAA) single crystal is an interesting nonlinear optical and dielectric material.  In order to understand the effect of some impurities (both inorganic and organic) on the electrical properties of LAA, we have grown from aqueous solutions pure and impurity (NaC/KCl/glycine/urea) added single crystals and electrically characterized.  DC and AC (with five different frequencies, viz. 100 Hz, 1 kHz, 10 kHz, 100 kHz and 1 MHz) electrical measurements were carried out at various temperatures ranging from 40-150oC along both a- and c- directions.  Results indicate an increase of the electrical parameters, viz. sac, er, tand and sdc with the increase of temperature. The results also indicate that the organic impurities decrease the er value < 4.0 for a wide temperature range, 40-150oC. 

Keywords :  Crystallization, doping effects, electrical measurements  

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