Stable ferroelectric phases and electric field effect in a relaxor solid solution system Pb(Zn_1/3Nb_2/3)O₃-xPbTiO₃

Abstract

The temperature-field phase diagrams of (1−x)Pb(Zn_1/3Nb_2/3)O₃-xPbTiO₃ (PZN-xPT) (4.5% < x < 9%) were investigated under the fields applied along the [001]_c, [011]_c, and [111]_c directions in the pseudo-cubic coordinate. The temperature-concentration phase diagram, obtained from the temperature-field phase diagrams by extrapolating the phase boundary to the zero field, was also presented in PZN-xPT mixed crystal system. The stable region of the orthorhombic (O) phase was determined, and the triple point, where the tetragonal (T), orthorhombic (O), and rhombohedral (R) phases meet, was found on the temperature-concentration phase diagram.

Keywords:

• PZN-xPT
• temperature-field phase diagram
• triple point
• temperature-concentration phase diagram

Acknowledgments

The authors would like to thank NF Corporation for fabricating the DC bias probe for ZGA5900 for measuring the dielectric constant.

Additional information

Funding

This work was supported in part by a Grant-in-Aid for Scientific Research (C) [grant number 25400323] from the Japan Society for the Promotion of Science to MI.