• Corpus ID: 119292476

Electric field induced irreversible transformation to the R3c phase and its influence on the giant piezo-strain behaviour of lead-free system- Na0.5Bi0.5TiO3-BaTiO3-K0.5Na0.5NbO3

@article{Khatua2015ElectricFI,
  title={Electric field induced irreversible transformation to the R3c phase and its influence on the giant piezo-strain behaviour of lead-free system- Na0.5Bi0.5TiO3-BaTiO3-K0.5Na0.5NbO3},
  author={Dipak Kumar Khatua and Anatoliy Senyshyn and Rajeev Ranjan},
  journal={arXiv: Materials Science},
  year={2015}
}

• D. Khatua, A. Senyshyn, R. Ranjan
• Published 2 July 2015
• Physics
• arXiv: Materials Science

A systematic study of the structural, dielectric and piezoelectric behaviour of the lead-free system (0.94-x) Na 0.5 Bi 05 TiO 3 -0.06BaTiO 3 -xK 0.5 Na 0.5 NbO 3 exhibiting giant piezo-strain was carried out as a function of composition (0.0 ≤ x ≤ 0.025), electric field and temperature. While x-ray diffraction revealed cubic structure for all the compositions, neutron diffraction patterns shows weak superlattice peaks characteristic of a √ 2 x √ 2 x 16 type modulation. The giant piezostrain is associated with field induced transformation of this modulated structure to rhombohedral (R3c) phase. It is shown that the maximum achievable strain decreases substantially in subsequent cycles due to partial irreversibility of the field induced rhombohedral phase after the first cycle.