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

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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

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Publication details

The article was received on 25 Jul 2019, accepted on 23 Sep 2019 and first published on 24 Sep 2019


Article type: Paper
DOI: 10.1039/C9CP04147H
Phys. Chem. Chem. Phys., 2019, Advance Article

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    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, Advance Article , DOI: 10.1039/C9CP04147H

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