Related Experiment Video
Updated: Nov 19, 2025
09:45
Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition
Published on: July 26, 2016
12.6K
A combinatory ferroelectric compound bridging simple ABO3 and A-site-ordered quadruple perovskite
Jianfa Zhao1,2, Jiacheng Gao1, Wenmin Li1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190, China.
Nature Communications
|February 3, 2021
Summary
Researchers synthesized a novel A-site-ordered perovskite, PbHg3Ti4O12, exhibiting ferroelectricity. This discovery marks the first ferroelectric transition in quadruple perovskites, opening new avenues for functional materials research.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Classical ABO3 perovskites are known for ferroelectric properties.
- A-site-ordered AA'3B4O12 perovskites lack reported ferroelectricity due to symmetry breaking.
- Understanding perovskite structure-property relationships is crucial for functional materials.
Purpose of the Study:
- To synthesize and characterize a novel A-site-ordered quadruple perovskite.
- To investigate the possibility of ferroelectricity in AA'3B4O12 perovskites.
- To explore the relationship between coordination chemistry and functional properties.
Main Methods:
- High-pressure synthesis techniques were employed.
- Crystallographic analysis was performed to determine structure and phase transitions.
- Symmetry breaking and ferroelectric properties were investigated.
Main Results:
- The A-site-ordered perovskite PbHg3Ti4O12 was successfully synthesized under high pressure.
- PbHg3Ti4O12 exhibits a phase transition from a high-temperature centrosymmetric paraelectric phase to a low-temperature non-centrosymmetric ferroelectric phase.
- The Hg2+ coordination in PbHg3Ti4O12 is a rare eight-ligand stereotype, differing from typical square planar coordination.
Conclusions:
- PbHg3Ti4O12 is the first reported ferroelectric material in the AA'3B4O12 quadruple perovskite family.
- This material bridges properties of simple ABO3 perovskites and A-site-ordered perovskites.
- The discovery opens new research directions for ferroelectric materials within the quadruple perovskite structure.
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