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Polar-Toroidal Phase Transformation in Inhomogeneous Nanoscale Ferroelectric Systems: A Novel Strategy for the Design of Energy Conversion Nanodevices

Published online by Cambridge University Press:  25 April 2017

Weijin Chen ,
Shuai Yuan ,
Ye Ji ,
Gelei Jiang ,
Jian Shao  and
Yue Zheng
Weijin Chen
Affiliation:
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
Shuai Yuan
Affiliation:
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
Ye Ji
Affiliation:
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
Gelei Jiang
Affiliation:
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
Jian Shao
Affiliation:
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
Yue Zheng*
Affiliation:
State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
*
*Corresponding author: zhengy35@mail.sysu.edu.cn
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Abstract

The ordering of polarization field of inhomogeneous ferroelectric systems were investigated. We found that these systems exhibit rather complex polarization ordering behaviors with the coexistence of polar and toroidal ordering, and particularly, a novel and tunable polar-toroidal phase transformation under external mechanical, electrical or thermal fields. Accompanying with this polar-toroidal phase transformation, there is a large change of polarization and strain. As a result, large eletromechanical and thermomechanical performance can be achieved in these systems. The polar/toroidal phase boundaries can be regarded a new kind of morphotropic phase boundary (MPB). The polar-toroidal phase transformation in nanoscale ferroelectric systems should provide us a novel strategy to develop energy conversion nanodevices.

Keywords

ferroelectricpiezoresponsephase transformation
Type
Articles
Information
MRS Advances , Volume 2 , Issue 56: Energy Storage and Conversion , 2017 , pp. 3427 - 3432
Copyright
Copyright © Materials Research Society 2017 

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References

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