Showcasing the Structure and Properties of Lanthanide‐Doped BaTiO3
Journal
Advanced Physics Research
Date Issued
May 12, 2025
DOI
10.1002/apxr.202500006
Abstract
Two-dimensional (2D) ferroelectrics, especially lead-free materials such asbarium titanate, BaTiO 3 , hold significant promise for advanced electronicsdue to their unique nanoscale properties. Doping BaTiO 3 with lanthanides(Ln) can enable fine-tuning of electrical and dielectric properties bysubstituting Ba 2+ (A-site) or Ti 4+ (B-site) in the perovskite structure. A-sitedoping enhances dielectric properties, while doping the B-site changes thepolarization and thermal stability. The site preference depends on the ionicradii and charge compensation mechanisms, which include oxygen vacanciesand self-compensation processes. This research delivers the structural andmicrostructural aspects of BaTiO3 doped with members of the Ln family fromLa to Lu, emphasizing their superior properties compared to undoped BaTiO 3 .Notably, the Ln dopants significantly influence the ferroelectric,ferromagnetic, luminescent, and piezocatalytic properties, where the ionicradius, doping mechanisms, defect formation, and preparation methods playa role. Theoretical studies and advanced characterization data indicate that Lndopants improve the performance of BaTiO3 by stabilizing structural defects,affecting site occupancy, and improving insulation resistance. Understandingthe defect chemistry and Ln ion distribution in Ln-doped BaTiO3 systems canhelp optimize their functional properties for next-generation technologies andsustainable energy applications.
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