Brewer, A, Lindemann, S, Wang, B, Maeng, W, Frederick, J, Li, F, Choi, Y, Thompson, PJ 
ORCID: 0000-0002-9697-6141, Kim, JW, Mooney, T et al (show 6 more authors)
(2021)
Microscopic piezoelectric behavior of clamped and membrane (001) PMN-30PT thin films.
APPLIED PHYSICS LETTERS, 119 (20).
202903-.
|
Text
2110.08692v1.pdf - Author Accepted Manuscript Download (1MB) | Preview |
Abstract
Bulk single-crystal relaxor-ferroelectrics, like Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT), are widely known for their large piezoelectricity. This is attributed to polarization rotation which is facilitated by the presence of various crystal symmetries for compositions near a morphotropic phase boundary (MPB). Relaxor-ferroelectric thin films, which are necessary for low-voltage applications, suffer a reduction in their piezoelectric response due to clamping by the passive substrate. To understand the microscopic behavior of this adverse phenomenon, we employ AC electric field driven in-operando synchrotron x-ray diffraction (XRD) on patterned device structures to investigate the piezoelectric domain behavior under an electric field for both a clamped (001) PMN-PT thin film on Si and a (001) PMN-PT membrane released from its substrate. In the clamped film, the substrate inhibits the field induced rhombohedral (R) to tetragonal (T) phase transition resulting in a reversible R to Monoclinic (M) transition with a reduced longitudinal piezoelectric coefficient d33 < 100 pm/V. Releasing the film from the substrate results in recovery of the R to T transition and results in a d33 > 1000 pm/V. Using diffraction with spatial mapping, we find that lateral constraints imposed by the boundary between active and inactive material also inhibits the R to T transition. Phase-field calculations on both clamped and released PMN-PT thin films simulate our experimental findings. Resolving the suppression of thin film piezoelectric response is critical to their application in piezo-driven technologies.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | cond-mat.mtrl-sci, cond-mat.mtrl-sci |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 27 Jul 2022 14:23 |
| Last Modified: | 17 Mar 2024 12:56 |
| DOI: | 10.1063/5.0068581 |
| Open Access URL: | https://arxiv.org/abs/2110.08692v1 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3159677 |
Dimensions
Dimensions
