Composition and poling process dependence of phase and piezoelectric activity of Er:PMN-PT crystals

• Published in: Journal of materials science. Materials in electronics Vol. 33; no. 16; pp. 13418 - 13425
• Main Authors: Long, Wei, Fang, Pinyang, Guo, Feifei, He, Aiguo, Xi, Zengzhe
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2022; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Composition; Crystal structure; Dielectric properties; Electric fields; Electric properties; Erbium; High temperature; Materials Science; Optical and Electronic Materials; Phase transitions; Piezoelectricity; Single crystals
• DOI: 10.1007/s10854-022-08278-7
• ISSN: 0957-4522

Piezoelectric response of erbium-doped (1- x )Pb(Mg 1/3 Nb 2/3 )O 3 - x PbTiO 3 (Er:PMN-PT) single crystals with various compositions and phases was studied using Rayleigh analysis. High temperature poling process was introduced to optimize the piezoelectric properties of the [001]-oriented Er:PMN-PT crystals. The Rayleigh analysis results show that the intrinsic contribution was dominated to the piezoelectric properties for the Er:PMN-PT crystals. The intrinsic and extrinsic piezoelectric responses of the Er:PMN- x PT, 0.29 ≤  x  ≤ 0.33, showed the larger values (~ 2000 pC/N) for the composition near the R-M phase boundary. The maximum piezoelectric coefficient was 2200 pC/N for the Er:PMN-0.33PT crystals. The piezoelectric response can be significantly enhanced by the high-temperature poling process, and the maximum was 2800 pC/N for the Er:PMN-0.29PT crystal. This ultra-high piezoelectric response was attributed to easing in the polarization rotation of the rhombohedral phase at high temperatures.