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

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

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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)

Cite this

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 - Sasaki, Takayoshi

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Access to Document

10.1088/0957-4484/26/24/244001