High electromechanical strain and enhanced temperature characteristics in lead-free (Na,Bi)TiO₃-BaTiO₃ thin films on Si substrates.

ABSTRACT: Here, we demonstrate the high electromechanical strain and enhanced temperature characteristics in the c-axis-oriented lead-free (Na,Bi)TiO₃-BaTiO₃ (NBT-BT) polycrystalline thin film prepared on Si substrates by rf magnetron sputtering. The effective transverse piezoelectric coefficient, e₃₁^*, estimated from the electromechanical strain measured under high electric field, reaches a high level of -12.5 C/m², and is comparable to those of conventional Pb(Zr,Ti)O₃ films. In-situ X-ray diffraction measurement and electron diffraction analysis revealed the electromechanical strain of the NBT-BT film to originate predominantly in elongation of the tetragonal (P4bm) crystal lattice in the c-axis direction. In addition to the large

SUBMITTER: Tanaka Y 

PROVIDER: S-EPMC5959895 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature