Implications of acceptor doping in the polarization and electrocaloric response of 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ relaxor ferroelectric ceramics

Abstract

In ferroelectrics, the effects of acceptor doping on electrical and electromechanical properties, often referred to as the “hardening” effects, are commonly related to domain-wall pinning mechanisms mediated by acceptor–oxygen-vacancy defect...

Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 ceramics

“…The structural data and XRD patterns of undoped PMN-10PT are collected in supplementary table S3 and figures S3(a), (b). (For completeness, figure S3(c) shows the change in lattice parameters upon incorporating manganese ions into the perovskite lattice in agreement with [12]). Similar to the structural analysis results, we observed no differences in the microstructure of pristine and irradiated samples on the level of FE-SEM (supplementary figure S4).…”

“…The deviation in ∆T EC values between individual samples of the same composition exposed to the same irradiation dose was ∼10%, see supplementary note 1 and figure S1. The ∆T EC values reported in this work are the experimental values multiplied by a correction factor of 1.4-1.6 as described in [12,30].…”

“…A recent study of manganese doping of PMN-10PT showed that the acceptor-oxygen vacancy defect complexes contributed to the dynamics of polar nano regions resulting in strongly suppressed frequency dispersion of dielectric permittivity and reduced freezing temperature compared to the undoped material. Consequently, the EC temperature change in Mn-doped PMN-10PT was less temperature dependent than in the undoped material, meaning that the temperature interval over which the EC response was maximum was broadened [12].…”

Substantially Enhanced Electrocaloric Effect in Ba(Zr0.2Ti0.8)O3 Lead-Free Ferroelectric Ceramics via Lattice Stress Engineering

“… n Pb­(Sc 0.5 Ta 0.5 )­O 3 o 0.9Pb­(Mg 1/3 Nb 2/3 )­O 3 – 0.1PbTiO 3 /1 mol % Mn p (Pb 0.86 La 0.02 Ba 0.11 )­(Zr 0.58 Sn 0.29 Ti 0.13 )­O 3 …”

Design of lead-free BCZT-based ceramics with enhanced piezoelectric energy harvesting performances

“…The observed peak splitting in J–E loops could be due to the coexistence of the polar and non-polar phases, which reversibly switch by applying the electric field. 53–55 In addition, Fig. 6c illustrates the room-temperature bipolar S–E plots of the x BTSn samples.…”