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

Abstract

Large sized crystals of CdTeMoO₆ with dimensions up to 30 × 12 × 9 mm³ were successfully grown using the top-seeded solution growth technique with an 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 crystals exhibit 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 crystals are good potential candidates for piezoelectric applications.