Piezoelectric response of disordered lead-based relaxor ferroelectrics

Lead-based relaxor ferroelectric perovskite oxides, exemplified by the (1–x)Pb(Mg 1/3 Nb 2/3 )O 3 –xPbTiO 3 (PMN-PT) solid solution, are a group of multifunctional materials with unique dielectric and piezoelectric properties. The long-lasting question that has intrigued the research community for d...

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Bibliographic Details
Published in:Communications materials 2023-02, Vol.4 (1), p.12-7, Article 12
Main Author: Rojac, Tadej
Format: Article
Language:English
Subjects:
639/301/1005/1007
639/301/119/996
Chemistry and Materials Science
Ferroelectric materials
Ferroelectricity
Ferroelectrics
Materials Science
Multifunctional materials
Perovskites
Perspective
Piezoelectricity
Questions
Relaxors
Single crystals
Solid solutions
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Summary:Lead-based relaxor ferroelectric perovskite oxides, exemplified by the (1–x)Pb(Mg 1/3 Nb 2/3 )O 3 –xPbTiO 3 (PMN-PT) solid solution, are a group of multifunctional materials with unique dielectric and piezoelectric properties. The long-lasting question that has intrigued the research community for decades is whether and to which extent the disordered relaxor nature of these materials is implicated in the exceedingly large piezoelectric response observed in both single crystals and ceramics. In this Perspective, focusing on PMN-PT, I briefly review and discuss the current understanding of the polar structure of relaxor ferroelectrics, followed by its possible implications in the large piezoelectricity. A critical review of the existing data confirms a significant progress made in recent years while opening up new questions related to the structure-property relations in these complex materials. Lead-based relaxor ferroelectrics are known for their large piezoelectric response, but the relation between the response and the nanoscale structure of these materials is still under debate. In this Perspective, the microscopic implications of the polar nature of disordered relaxor ferroelectrics are critically reviewed.
ISSN:2662-4443
2662-4443
DOI:10.1038/s43246-023-00336-9