Detailed Investigation of Temperature-Field Phase Diagrams in Pb(Zn_1/3Nb_2/3)O₃–9%PbTiO₃

Abstract

The temperature and the DC biasing field dependences of dielectric constants along the [011]- and [111]-directions of the cubic coordinate in 91%Pb(Zn_1/3Nb_2/3)O_3–9%PbTiO₃ (PZN-9%PT) have been investigated. The temperature-field phase diagrams have been constructed in the field range below 15 kV/cm. It has been found that there exists the orthorhombic phase below the tetragonal phase as a ground state of the system in PZN-9%PT. The tetragonal phase disappears in the external field above about 11 kV/cm along the [011]- and [111]-directions.

Keywords:

• PZN
• relaxor
• ferroelectric
• morphotropic phase boundary
• critical end-point

Acknowledgments

The authors would like to thank NF Corporation for fabricating the DC bias probe for ZGA5900 to measure the dielectric constant. This work was supported in part by a Grant-in-Aid for Scientific Research (B) (No. 22340081) from the Japan Society for the Promotion of Science to MI.