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

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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 polartoroidal 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.

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Authors and Affiliations

  1. State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China

    Weijin Chen, Shuai Yuan, Ye Ji, Gelei Jiang, Jian Shao & Yue Zheng

Authors
  1. Weijin Chen
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  2. Shuai Yuan
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  3. Ye Ji
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  4. Gelei Jiang
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  5. Jian Shao
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  6. Yue Zheng
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Correspondence to Yue Zheng.

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Chen, W., Yuan, S., Ji, Y. et al. Polar-Toroidal Phase Transformation in Inhomogeneous Nanoscale Ferroelectric Systems: A Novel Strategy for the Design of Energy Conversion Nanodevices. MRS Advances 2, 3427–3432 (2017). https://doi.org/10.1557/adv.2017.316

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  • DOI: https://doi.org/10.1557/adv.2017.316

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