In situ measurement of increased ferroelectric/ferroelastic domain wall motion in declamped tetragonal lead zirconate titanate thin films
Abstract
Ferroelectric/ferroelastic domain reorientation was measured in a 1.9 μm thick tetragonal {001} oriented PbZr0.3Ti0.7O3 thin film doped with 1% Mn under different mechanical boundary constraints. Domain reorientation was quantified through the intensity changes in the 002/200 Bragg reflections as a function of applied electric field. To alter the degree of clamping, films were undercut from the underlying substrate by 0%, ∼25%, ∼50%, or ∼75% of the electrode area. As the amount of declamping from the substrate increased from 0% to ∼75%, the degree of ferroelectric/ferroelastic domain reorientation in the films increased more than six fold at three times the coercive field. In a film that was ∼75% released from the substrate, approximately 26% of 90° domains were reoriented under the maximum applied field; this value for domain reorientation compares favorably to bulk ceramics of similar compositions. An estimate for the upper limit of 90° domain reorientation in a fully released film under these conditions was determined to be 32%. It was also found that the different clamping conditions strongly influence the amount of reorientation upon removing the applied field, with higher remanence of preferred domain orientations observed in declamped films.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 06, 2015
- Source ID
- 10.1063/1.4907394
Entities
People
- C. M. Fancher
- G. Esteves
- Jacob L. Jones
- Margeaux Wallace
- R. H. T. Wilke
- R. L. Johnson-wilke
- S. Trolier-mckinstry
Organizations
- Army Research Office
- National Science Foundation
- North Carolina State University
- Pennsylvania State University
- United States Department of Energy