Synthesis and Electric Properties of Alminum Substituted Langasite-type La3Nb0.5Ga5.5O14 Single Crystals

Abstract

Al-substituted La₃Nb_0.5Ga_5.5O₁₄ (La₃Nb_0.5Ga_5.5-xAl_xO₁₄; LNGA_x) single crystals were synthesized by the conventional Czochralski technique. The solubility limit of x=0.2 have been grown The electric properties of the LNGAx crystals were investigated and compared with those of LNG. By Al substitution, the electromechanical coupling factors (k₁₂) became slightly larger. The LNGAx crystals showed a lower temperature dependence of d₁₁ and a higher electric resistivity rho than those of the LNG crystals.