Investigation of the dielectric and piezoelectric properties of ReCa4O(BO3)3 crystals
RIS ID
107474
Abstract
Piezoelectric ReCa4O(BO3)3 (ReCOB, Re: rare earth) crystals, including ErCOB, SmCOB, PrCOB and LaCOB, were successfully grown by the Czochralski (Cz) method. The dielectric constants were determined to be ε11 T/ε0 = 9.50, ε22 T/ε0 = 11.8 and ε33 T/ε0 =9.80 for ErCOB, ε11 T/ε0 = 9.70, ε 22 T/ε0 = 13.9 and ε33 T/ε0 = 9.90 for SmCOB, ε11 T/ε0 = 9.60, ε22 T/ ε0 = 15.3 and ε33 T/ε0 = 10.0 for PrCOB, ε11 T/ε0 = 9.40, ε22 T/ε0 = 15.0 and ε33 T/ε0 = 9.60 for LaCOB, respectively. The electromechanical coupling factors k26 and piezoelectric coefficients d26 were found to be 18.5% (7.6 pC N -1), 27.0% (12.7 pC N-1), 31.5% (15.8 pC N-1) and 25.0% (11.8 pC N-1) for ErCOB, SmCOB, PrCOB and LaCOB crystals, respectively. The dielectric and piezoelectric properties as a function of Re3+ ion radius were studied, with maximum values being observed in the PrCOB crystals, due to the similar ion radius of Pr3+ and Ca 2+. The relationship between the structure and dielectric/ piezoelectric properties of ReCOB crystals was explored, to further optimize the dielectric and piezoelectric properties in ReCOB series crystals. 2011 IOP Publishing Ltd.
Publication Details
Yu, F., Zhang, S., Zhao, X., Guo, S., Duan, X., Yuan, D. & Shrout, T. R. (2011). Investigation of the dielectric and piezoelectric properties of ReCa4O(BO3)3 crystals. Journal of Physics D: Applied Physics, 44 (13), 135405-1-135405-6.