Single-crystal relaxor ferroelectric piezoactuators with interdigitated electrodes

Document Type

Article

Publication Date

12-1-2004

Abstract

We report on the fabrication and performance of (1-x) Pb(Zn 1/3Nb 2/3)O 3-xPbTiO 3 (PZN-PT) single-crystal relaxor piezoactuators with interdigitated electrodes patterned on a single surface. An electric field gradient across the sample thickness induces a differential contraction between opposite faces, and it is responsible for the actuation. The samples are poled by energizing the electrodes at 100°C and cooling in a field. Calculations of the piezoelectric response based on a periodically modulated dipolar field yield good agreement with experiment. Discrepancies with the model are ascribed to multidomain formation in the ferroelectric sample as a result of field reversals in the applied electric field along the sample length.

Publication Title

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

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