Effect of electric field on dielectric, ac conduction and ferroelectric behavior of flux-grown Pb(Zn1/3 Nb2/3)0.91Ti0.09O3 single crystals

✍ Scribed by Singh, B. K. ;Kumar, K. ;Gupta, M. K. ;Kumar, B.

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 682 KB
• Volume: 207
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200925643

✦ Synopsis

Abstract

The temperature dependence of dielectric and piezoelectric behavior of Pb(Zn~1/3~ Nb~2/3~)~0.91~Ti~0.09~O~3~ single crystals has been investigated for samples poled at different fields along [0 0 1] direction. An increase in rhombohedral to tetragonal phase‐transition temperature (T~rt~) with dc field was observed due to the polarization rotation via a monoclinic phase. At higher field, a small kink in the dielectric constant near 125 °C was observed, suggesting a field‐induced rhombohedral to monoclinic phase transition. The activation energy for conduction, below T~rt~, was determined as 0.17, 0.32, and 0.11 eV for the samples poled at 0, 0.5, and 1.0 kV/mm, respectively.