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Updated: Oct 22, 2025
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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
Published on: March 27, 2018
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Phase Transition Effect on Ferroelectric Domain Surface Charge Dynamics in BaTiO3 Single Crystal
Dongyu He1, Xiujian Tang1, Yuxin Liu1
1National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China.
Materials (Basel, Switzerland)
|August 27, 2021
Summary
Surface charge dynamics in barium titanate (BaTiO3) single crystals were measured. Domain surface potential proved unstable, while domain walls exhibited defects and excess energy, impacting ferroelectric applications.
Area of Science:
- Materials Science
- Surface Science
- Condensed Matter Physics
Background:
- Ferroelectric materials like barium titanate (BaTiO3) exhibit complex surface phenomena after phase transitions.
- Understanding surface charge dynamics is crucial for optimizing ferroelectric device performance.
Purpose of the Study:
- To directly measure ferroelectric domain surface charge dynamics on a BaTiO3 (001) surface post-cubic-to-tetragonal phase transition.
- To investigate the stability of domain potentials and the behavior of domain walls.
Main Methods:
- Utilized scanning probe microscopy to capture surface potential distribution.
- Analyzed changes in domain structure, surface potential, and domain wall characteristics.
Main Results:
- Observed rapid formation of domain structures with unstable surface potentials that reversed sign over time.
- Documented high potential barriers at corrugated domain walls that dissipated, indicating surface screening charge migration.
- Found domain walls with topological defects, polarity variations, broadening, and stress changes, leading to excess energy.
Conclusions:
- Both ferroelectric domain characteristics and domain wall properties are critical considerations for practical applications.
- Surface screening charge migration plays a significant role in observed potential decay.
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