Issue 41, 2019

Periodically-arrayed ferroelectric nanostructures induced by dislocation structures in strontium titanate

Abstract

A dislocation induces ferroelectricity around it in incipient ferroelectric SrTiO3 due to some reasons such as electro-mechanical coupling and it being a one-dimensional ferroelectric nanostructure. Furthermore, this microstructure is arrayed periodically in the material and dislocation structures such as a dislocation wall are formed. Due to these facts, periodically-arrayed ferroelectric nanostructures, which show various intriguing polarization configurations and functionalities depending on the internal periodic structure, may be fabricated by dislocations. The phase-field simulation exhibits that a ferroelectric nano-region induced by the strain concentration and incidental electric field around a dislocation connects with each other in a dislocation wall. As a result, a periodic ferroelectric nano-region, which is a periodically-arrayed ferroelectric nanostructure embedded in paraelectric matrices, is formed. Our findings provide a new pathway for the fabrication of novel functional nanodevices in ferroelectric systems.

Graphical abstract: Periodically-arrayed ferroelectric nanostructures induced by dislocation structures in strontium titanate

Supplementary files

Article information

Article type
Paper
Submitted
25 Jul 2019
Accepted
23 Sep 2019
First published
24 Sep 2019

Phys. Chem. Chem. Phys., 2019,21, 22756-22762

Periodically-arrayed ferroelectric nanostructures induced by dislocation structures in strontium titanate

K. Masuda, L. V. Lich, T. Shimada and T. Kitamura, Phys. Chem. Chem. Phys., 2019, 21, 22756 DOI: 10.1039/C9CP04147H

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