Orthorhombic-tetragonal phase coexistence and enhanced piezo-response at room temperature in Zr, Sn, and Hf modified BaTiO3

作者：Ajay Kumar Kalyani, Kumar Brajesh, Anatoliy Senyshyn, Rajeev Ranjan · 发表于：Applied Physics Letters · 年份：2014 · DOI：10.1063/1.4885516 · 被引用次数：174 · 研究领域：Ferroelectric and Piezoelectric Materials、Acoustic Wave Resonator Technologies、Multiferroics and related materials

The effect of Zr, Hf, and Sn in BaTiO3 has been investigated at close composition intervals in the dilute concentration limit. Detailed structural analysis by x-ray and neutron powder diffraction revealed that merely 2 mol. % of Zr, Sn, and Hf stabilizes a coexistence of orthorhombic (Amm2) and tetragonal (P4mm) phases at room temperature. As a consequence, all the three systems show substantial enhancement in the longitudinal piezoelectric coefficient (d33), with Sn modification exhibiting the highest value ∼425 pC/N.