Dielectric and Ferroelectric Properties of Pb(Zr_1/2Ti_1/2)O₃-Pb(Ni_1/3Nb_2/3)O₃ Ceramics Under Perpendicular Compressive Stress

Abstract

The dielectric and ferroelectric properties of (1-x)Pb(Zr_1/2Ti_1/2)O₃-(x)Pb(Ni_1/3Nb_2/3)O₃ or (1-x)PZT-(x)PNN (x = 0.1–0.5) ceramics were measured under compressive stress applied perpendicular to an electric field direction. For the dielectric properties, the experimental results revealed that the superimposed perpendicular compression stress reduced the dielectric constant and the dielectric loss tangent of all compositions. The stress-induced changes the dissipation energy, the polarizations, however, depended significantly on ceramic compositions, but increases the coercive field of all the compositions. These results were interpreted through the non-180° ferroelastic domain switching processes, the stress clamping of domain walls, de-aging mechanism, and the stress induced enhance in switchable part of spontaneous polarization.

Keywords:

• Dielectric
• ferroelectric
• PZT-PNN
• compressive stress
• perpendicular

Acknowledgments

This work was financially supported by the Industry/University Cooperative Research Center (IUCRC) in HDD Component, the Faculty of Engineering, Khon Kaen University and National Electronics and Computer Technology Center, National Science and Technology Development Agency (NSTDA). Muangjai Unruan specially acknowledges the financial support from the Thailand Research Fund through the Royal Golden Jubilee PhD Program. Faculty of Science and Graduate School of Chiang Mai University are also acknowledged for support. Partial support has been provided through the NFS grants DMR 0407462 & DMR 0844081.