Effect of substrate temperature on the structure and the metal insulator transition in pulsed laser deposed V0_(2) films on soda lime glass

摘要

In this paper, we report the effect of soda lime substrate deposition temperature (T_s) on the crystal structure and the metal insulator transition of VO_2 thin films. Samples were deposited at substrate deposition temperature ranging from 450 to 600 ℃ by pulsed-laser deposition and characterized by x-ray diffraction and UV-VIS spectrophotometer. At a substrate temperature of 550 ℃, the VO_2 (100) reflection dominate the spectrum showing a change in crystalline grains orientation. The highest transition temperatures of 74 ℃ with the lowest hysteresis width of 11 ℃ were obtained on the same sample grown at a substrate deposition temperature of 500 ℃ and also corresponding to the largest grains size of a value of 350 nm.