Dielectric Response of PLZT 9.5/65/35 Relaxor Under Hydrostatic Pressure

Abstract

The effect of hydrostatic pressure on the dielectric response of PLZT 9.5/65/35 relaxor was studied on cooling the samples from temperatures higher than T_ε′max to avoid the influence of spontaneous aging. The dielectric anomaly, characteristic of classical relaxor, was found to be suppressed and shifted downwards at elevated pressures. The pressure coefficient dT_ε′max/dp = −(20.4 ± 0.9)K/GPa is considerably smaller than that reported for PLZT 6/65/35 and PLZT 12/40/60, which exhibit weak relaxor behavior and spontaneous transition to the ferroelectric state.

Keywords::

• hydrostatic pressure
• relaxor
• PLZT

ACKNOWLEDGMENT

One of us (A.H.) acknowledges the support of Grant 1 P03B 11027 from the Committee of Scientific Researched in Poland that enabled the work on relaxors under pressure.