Electric-elastic properties of a novel high-quality CdTeMoO₆ piezoelectric crystal

Conggang Li, Zeliang Gao*, Xiangxin Tian, Qian Wu, Weiqun Lu, Youxuan Sun and Xutang Tao*

CrystEngComm, 2018, 20, 5602-5608

Abstract

Large sized crystals of CdTeMoO₆ with dimensions up to 30 × 12 × 9 mm³ were successfully grown using top-seeded solution growth technique with optimized flux system. High resolution X-ray diffraction rocking curve measurements revealed that the full-width at half-maximum (FWHM) of the rocking curve was 36 arcsec from the (001) reflection, which indicated high crystal quality. A complete set of room temperature elastic, dielectric, and piezoelectric constants of CdTeMoO₆ single crystals was obtained using both resonance techniques and impedance analysis. The results demonstrate that the CdTeMoO₆ crystal possesses intriguing piezoelectric and elastic properties. The piezoelectric coefficients d₁₄ and d₃₆ reached 20.14 pC·N^-1 and 7.58 pC·N^-1, respectively, and the corresponding electromechanical coupling coefficients k₁₄ and k₃₆ were up to 22.78% and 19.48%, respectively. Furthermore, the relationship between the crystal structure and piezoelectric properties is also investigated. Our observations indicate that CdTeMoO₆ crystal is a good potential candidate for piezoelectric applications.