Epitaxial Strain Control of Relaxor Ferroelectric Phase Evolution
- Univ. of California, Berkeley, CA (United States)
- Univ. of Nebraska, Lincoln, NE (United States)
- Univ. of Pennsylvania, Philadelphia, PA (United States)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Understanding and ultimately controlling the large electromechanical effects in relaxor ferroelectrics requires intimate knowledge of how the local-polar order evolves under applied stimuli. Here, the biaxial-strain-induced evolution of and correlations between polar structures and properties in epitaxial films of the prototypical relaxor ferroelectric 0.68PbMg1/3Nb2/3O3–0.32PbTiO3 are investigated. X-ray diffuse-scattering studies reveal an evolution from a butterfly- to disc-shaped pattern and an increase in the correlation-length from ≈8 to ≈25 nm with increasing compressive strain. Molecular-dynamics simulations reveal the origin of the changes in the diffuse-scattering patterns and that strain induces polarization rotation and the merging of the polar order. As the magnitude of the strain is increased, relaxor behavior is gradually suppressed but is not fully quenched. Analysis of the dynamic evolution of dipole alignment in the simulations reveals that, while, for most unit-cell chemistries and configurations, strain drives a tendency toward more ferroelectric-like order, there are certain unit cells that become more disordered under strain, resulting in stronger competition between ordered and disordered regions and enhanced overall susceptibilities. Ultimately, this implies that deterministic creation of specific local chemical configurations could be an effective way to enhance relaxor performance.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Gordon and Betty Moore Foundation (GBMF); National Science Foundation (NSF); US Army Research Office (ARO); US Department of the Navy, Office of Naval Research (ONR); USDOD; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357; FG02-07ER46431; SC0012375
- OSTI ID:
- 1633233
- Alternate ID(s):
- OSTI ID: 1506136
OSTI ID: 1523531
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Journal Issue: 21 Vol. 31; ISSN 0935-9648
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Emerging Conductive Atomic Force Microscopy for Metal Halide Perovskite Materials and Solar Cells
|
journal | March 2020 |
Sr-induced dipole scatter in Ba x Sr 1 − x TiO 3 : Insights from a transferable-bond valence-based interatomic potential
|
journal | November 2019 |
Defect-Induced (Dis)Order in Relaxor Ferroelectric Thin Films
|
journal | November 2019 |
Similar Records
Light-Driven Ultrafast Polarization Manipulation in a Relaxor Ferroelectric
Heterogeneous field response of hierarchical polar laminates in relaxor ferroelectrics
Coupled polarization and nanodomain evolution underpins large electromechanical responses in relaxors
Journal Article
·
Tue Nov 29 19:00:00 EST 2022
· Nano Letters
·
OSTI ID:1987304
Heterogeneous field response of hierarchical polar laminates in relaxor ferroelectrics
Journal Article
·
Thu Jun 27 20:00:00 EDT 2024
· Science
·
OSTI ID:2502065
Coupled polarization and nanodomain evolution underpins large electromechanical responses in relaxors
Journal Article
·
Wed Oct 05 20:00:00 EDT 2022
· Nature Physics
·
OSTI ID:2426630