Complete electroelastic set for the (YXt)-45 cut of a KNbO3 single crystal

R Rouffaud (1) , P. Marchet , Anne-Christine Hladky (2) , C. Bantignies (3) , M. Pham-Thi (4) , F. Levassort

1 GREMAN - UMR 7347 - GREMAN (matériaux, microélectronique, acoustique et nanotechnologies)
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
3 Vermon S.A.
4 Thales Research and Technology [Palaiseau]

A complete and consistent set (elastic, dielectric, and piezoelectric tensors) of a commercial lead-free (YXt)-45 cut KNbO 3 single crystal is reported. These data were obtained using several samples and the resonance-antiresonance method. Particular attention was paid to the consistency of this delivered database. A genetic algorithm with an appropriate criterion was used. Electromechanical characterization revealed a high thickness coupling factor of approximately 60%. These properties make this single crystal a good candidate for several applications such as medical imaging. This complete set provides a basis for simulation designs of such devices integrating this piezoelectric lead-free material, especially for ultrasonic transducers. V C 2014 AIP Publishing LLC.

Domaines: Micro et nanotechnologies/Microélectronique; Energie électrique; Acoustique [physics.class-ph]

R Rouffaud, P. Marchet, Anne-Christine Hladky, C. Bantignies, M. Pham-Thi, et al.. Complete electroelastic set for the (YXt)-45 cut of a KNbO3 single crystal. Journal of Applied Physics, 2014, 116 (19), ⟨10.1063/1.4902168⟩. ⟨hal-01705113⟩