Ferroelectric instabilities and enhanced piezoelectric response in Ce modified BaTiO3 lead-free ceramics

Brajesh, Kumar; Kalyani, Ajay Kumar; Ranjan, Rajeev
January 2015
Applied Physics Letters;1/1/2015, Vol. 106 Issue 1, p1
Academic Journal
The crystal structure, ferroelectric, and piezoelectric behaviors of the Ba(Ti1_xCex)O3 solid solution have been investigated at close composition intervals in the dilute concentration regime. Ce concentration as low as 2 mol. % induces tetragonal-orthorhombic instability and coexistence of the phases, leading to enhanced high-field strain and direct piezoelectric response. Detailed structural analysis revealed tetragonal + orthorhombic phase coexistence for x = 0.02, orthorhombic for 0.03 ≤ x ≤ 0.05, and orthorhombic + rhombohedral for 0.06 ≤ x ≤ 0.08. The results suggest that Ce-modified BaTiO3 is a potential lead-free piezoelectric material.


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