Investigations of Secondary Contribution to Electrocaloric Effect in Relaxor PMN-PT Ceramic

In this work, primary and secondary contributions to electrocaloric effect were investigated in a relaxor PMN-PT ceramic, by combining polarization and strain hysteretic measurements. Our results indicate that, although the ceramic shows a large electromechanical response, field-induced dimensional...

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Published in:Ferroelectrics 2015-04, Vol.478 (1), p.165-169
Main Authors: Correia, T. M., Rokosz, M.
Format: Article
Language:English
Subjects:
Ceramics
Crystal structure
Dimensional analysis
Dimensional changes
Electric properties
Electrocaloric effect
Ferroelectric materials
Heterostructures
Hysteresis
Mechanical properties
piezoelectric
PMN-PT
Polarization
relaxor
Relaxors
Strain
Strain rate
Temperature effects
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description In this work, primary and secondary contributions to electrocaloric effect were investigated in a relaxor PMN-PT ceramic, by combining polarization and strain hysteretic measurements. Our results indicate that, although the ceramic shows a large electromechanical response, field-induced dimensional change (secondary effect) accounts for less than 19 % of the ceramic electrocaloric response over the 30-200°C temperature range. We believe that the method for the characterization of electrocaloric materials presented herein can provide valuable insights into the development of novel and optimized materials and heterostructures by tailoring primary and secondary contributions.
doi_str_mv 10.1080/00150193.2015.1011560
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subjects Ceramics
Crystal structure
Dimensional analysis
Dimensional changes
Electric properties
Electrocaloric effect
Ferroelectric materials
Heterostructures
Hysteresis
Mechanical properties
piezoelectric
PMN-PT
Polarization
relaxor
Relaxors
Strain
Strain rate
Temperature effects
title Investigations of Secondary Contribution to Electrocaloric Effect in Relaxor PMN-PT Ceramic
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