Controlling the domain size to enhance the piezoelectricity of BiFeO3–BaTiO3via heterovalent doping

We demonstrate a novel concept of domain engineering to simultaneously achieve outstanding piezoelectricity ( d 33 ∼ 191 pC N −1 ) and high Curie temperature ( T C ∼ 485 °C) in BF ceramics by adding elements with high valence difference.