LAUSR

Abstract We have investigated the critical behavior of relaxor Pb 0.91 La 0.09 Zr 0.65 Ti 0.35 O 3 [(PLZT 9/65/35] to unveil the systematic effect of Polar Nano Regions (PNRs) on electrocaloric effect (ECE) and energy storage properties via dielectric spectroscopy and isothermal P (polarization) vs E (electric field) loops measurements. To capture the basic notion about PNR driven phase evolution and realize the relevance of the mean-field approach, we have followed the master curve scheme for ∆ S E ( E , T ) profile. The observed ∆ S E ( T ) curves of various E are well collapsed into a single universal curve with two reference temperatures, this approach usually applied to deal the multiphase magnetic systems. This suggests that the polar activity associated with PNRs is diverse in a certain manner from the typical displacive polar domains. Additionally, we have disclosed the energy storage aspect of PNRs in relaxors. The thermal profile of efficiency reveals that the PNRs play a conclusive role in the energy storage application.