Experimental Measurement of Electric Conductivity and Activation Energy in Congruent Lithium Niobate Crystal
Bachir Chikh-Bled, Boumédiène Benyoucef and Michel Aillerie
Dielectric conductivity of congruent lithium niobate (LiNbO3, LN) crystals was characterized by the classical method using a guard electrode on one face of the sample. The dielectric characterizations of samples are performed by current-tension measurements in the 160–300ºC temperature range. The activation energy of LN crystals is deduced by calculation from the obtained characterization experimental results. The method presented in this paper doesn’t constitute a novelty itself but the overall process yielding to the determination of the activation energy of LN is originally presented, started from sample preparation to the final calculation and modeling.
Keywords: Lithium niobate, volumic resistivity, electrical conductivity, activation energy