Large electrocaloric effect induced by the multi-domain to mono-domain transition in ferroelectrics

Jie Wang, Man Liu, Yajun Zhang, Takahiro Shimada, San-Qiang Shi, Takayuki Kitamura

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)

Abstract

The electrocaloric properties of multi-domain ferroelectrics are investigated using a phase field model. The simulation results show that the extrinsic contribution from the multi-domain to mono-domain transition driven by temperature significantly enhances the electrocaloric response. Due to the abrupt decrease of polarization in the direction of electric field during the domain transition, a large adiabatic temperature change is achieved for the ferroelectrics subjected to a tensile strain. Furthermore, the domain transition temperature can be tuned by external strains as the phase transition temperature. A compressive strain decreases the domain transition temperature while a tensile strain increases it. The large temperature change associated with the domain transition provides guidance to engineer domain structures by strain to optimize the electrocaloric properties of ferroelectric materials below the Curie temperature.
Original languageEnglish
Article number164102
JournalJournal of Applied Physics
Volume115
Issue number16
DOIs
Publication statusPublished - 28 Apr 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this