Growth and dielectric properties of L-arginine acetate and L-arginine oxalate single crystals

摘要

Single crystals of L-arginine acetate (LAA) and L-arginine oxalate (LAO), potential nonlinear optical materials, have been grown from respective aqueous solutions by using the slow cooling method. X-ray diffraction measurements confirmed the material of the grown crystals. Dielectric measurements were carried out at various temperatures ranging from 40-140℃ and with various frequencies ranging from 100 Hz-1 MHz along a- and c-directions by using the parallel plate capacitor method. Results indicate an increase of AC electrical parameters with the increase of temperature. The low ε_r values observed (around 4 at 40℃) indicate that both LAA and LAO are promising low ε_r value dielectric materials.