Topological Phase Transitions, Phase Diagrams, and Dielectric Properties of Pb(Zr0.7Ti0.3)O3‐Based Superlattices
Abstract Ferroelectric/paraelectric superlattices, created through the periodic stacking of their constituent materials, exhibit intricate phase diagrams that reveal a variety of polar topologies and properties not found in any of the individual components. In this study, the phase‐field simulations...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2025-08-01
|
| Series: | Advanced Physics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/apxr.202500004 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Abstract Ferroelectric/paraelectric superlattices, created through the periodic stacking of their constituent materials, exhibit intricate phase diagrams that reveal a variety of polar topologies and properties not found in any of the individual components. In this study, the phase‐field simulations are utilized to systematically calculate the phase diagrams of Zr‐rich Pb(Zr, Ti)O3/SrTiO3 superlattices with varying periodicity, strain, and temperature. A rhombohedral‐type labyrinth domain is observed, which is oriented along the [110] direction under relatively low compressive strain. Meanwhile, higher compressive strains lead to the formation of polar skyrmions with shorter periodicities. Notably, a high dielectric permittivity of 1700 is found at room temperature for the polar skyrmion phase with a periodicity of 6 when grown on a DyScO3 substrate, which is double the value for the skyrmion phase in a PbTiO3/SrTiO3 superlattice. Moreover, a phase transition from skyrmion, vortex/labyrinth states to a cubic phase at elevated temperatures is discovered, accompanied by a significant reduction in dielectric responses. It is hoped that the work will inspire further exploration into the design of intriguing polar topologies with superior properties. |
|---|---|
| ISSN: | 2751-1200 |