Impact of the Electric Field on the Freezing Dynamics of Pb(Mg_1/3Nb_2/3)O₃

Abstract

The dielectric response of canonical relaxor PMN single crystal oriented in [111] direction was investigated under the influence of various dc bias electric fields. The behavior of the Vogel-Fulcher temperature obtained from the characteristic relaxation times determined from the peaks of the imaginary component ϵ″(T) of the complex dielectric constant ϵ*(T) was studied as a function of the dc bias electric field. The observed results reveal nonmonotonous behavior of the Vogel-Fulcher temperature as a function of the strength of the dc bias electric field. We show that such a behavior can be well interpreted in terms of nonlinear dielectric susceptibility as a dominant factor in the dielectric dynamic of relaxors in dc bias electric fields.

Keywords:

• Relaxor ferroelectric
• dc bias electric field
• Vogel-Fulcher temperature
• nonlinear dielectric susceptibility

Acknowledgments

This work was supported by the NAMASTE Centre of Excellence and Slovenian Research Agency under the program P1-0125 and projects J1-2015, PR-03086-1.