The Effect of Composition Gradient on Microdomain Structure and the Macro-Ferroelectric/Piezoelectric Properties

Internal fields caused by strain gradient, composition gradient (CG), and space charges have significant influences on micro and macro properties of ferroelectrics. Here, we report the relationship among composition gradient, microdomain structure, and macroscopic ferroelectric/piezoelectric properties. Three KTa1–xNbxO3 samples with the same Curie temperature Tc = 39 °C and different CGs are designed and investigated. As CG decreases, the scale...