Artificial design for new ferroelectrics using nanosheet-architectonics concept

Yoon Hyun Kim; Lei Dong; Minoru Osada; Bao Wen Li; Yasuo Ebina; Takayoshi Sasaki

doi:10.1088/0957-4484/26/24/244001

Artificial design for new ferroelectrics using nanosheet-architectonics concept

Yoon Hyun Kim, Lei Dong, Minoru Osada, Bao Wen Li, Yasuo Ebina, Takayoshi Sasaki

School of Law

Research output: Contribution to journal › Article

8 Citations (Scopus)

Abstract

Control over the emergence of ferroelectric order remains a fundamental challenge for the rational design of artificial materials with novel properties. Here we report a new strategy for artificial design of layered perovskite ferroelectrics by using oxide nanosheets (high-k dielectric Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf> and insulating Ti<inf>0.87</inf>O<inf>2</inf>) as a building block. We approached the preparation of superlattice films by a layer-by-layer assembly involving Langmuir-Blodgett deposition. The artificially fabricated (Ti<inf>0.87</inf>O<inf>2</inf>/Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf>)<inf>2</inf>(Ti<inf>0.87</inf>O<inf>2</inf>) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (Ti<inf>0.87</inf>O<inf>2</inf>/Ca<inf>2</inf>Nb<inf>3</inf>O<inf>10</inf>)<inf>2</inf>(Ti<inf>0.87</inf>O<inf>2</inf>) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity with a good fatigue-free characteristic. Considering the flexibility of self-assembled nanosheet interfaces, this technique provides a route to synthesize a new kind of layered ferroelectric oxides.

Original language	English
Article number	244001
Journal	Nanotechnology
Volume	26
Issue number	24
DOIs	https://doi.org/10.1088/0957-4484/26/24/244001
Publication status	Published - 2015 Jun 19

Keywords

oxide nanosheets, nanoarchitectonics, artificial superlattice, layer-by-layer assembly ferroelectricity

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Electrical and Electronic Engineering
Mechanical Engineering
Mechanics of Materials
Materials Science(all)

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Kim, Y. H., Dong, L., Osada, M., Li, B. W., Ebina, Y., & Sasaki, T. (2015). Artificial design for new ferroelectrics using nanosheet-architectonics concept. Nanotechnology, 26(24), [244001]. https://doi.org/10.1088/0957-4484/26/24/244001

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abstract = "Control over the emergence of ferroelectric order remains a fundamental challenge for the rational design of artificial materials with novel properties. Here we report a new strategy for artificial design of layered perovskite ferroelectrics by using oxide nanosheets (high-k dielectric Ca2Nb3O10 and insulating Ti0.87O2) as a building block. We approached the preparation of superlattice films by a layer-by-layer assembly involving Langmuir-Blodgett deposition. The artificially fabricated (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity with a good fatigue-free characteristic. Considering the flexibility of self-assembled nanosheet interfaces, this technique provides a route to synthesize a new kind of layered ferroelectric oxides.",

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AU - Li, Bao Wen

AU - Ebina, Yasuo

AU - Sasaki, Takayoshi

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N2 - Control over the emergence of ferroelectric order remains a fundamental challenge for the rational design of artificial materials with novel properties. Here we report a new strategy for artificial design of layered perovskite ferroelectrics by using oxide nanosheets (high-k dielectric Ca2Nb3O10 and insulating Ti0.87O2) as a building block. We approached the preparation of superlattice films by a layer-by-layer assembly involving Langmuir-Blodgett deposition. The artificially fabricated (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices are structurally unique, which is not feasible to create in the bulk form. By such an artificial structuring, we found that (Ti0.87O2/Ca2Nb3O10)2(Ti0.87O2) superlattices possess a new form of interface coupling, which gives rise to ferroelectricity with a good fatigue-free characteristic. Considering the flexibility of self-assembled nanosheet interfaces, this technique provides a route to synthesize a new kind of layered ferroelectric oxides.

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