A-site-modified perovskite nanosheets and their integration into high-κ dielectric thin films with a clean interface

Bao Wen Li; Minoru Osada; Tadashi C. Ozawa; Kosho Akatsuka; Yasuo Ebina; Renzi Ma; Kanta Ono; Hiroshi Funakubo; Takayoshi Sasaki

doi:10.1143/JJAP.49.09MA01

A-site-modified perovskite nanosheets and their integration into high-κ dielectric thin films with a clean interface

Bao Wen Li^*, Minoru Osada, Tadashi C. Ozawa, Kosho Akatsuka, Yasuo Ebina, Renzi Ma, Kanta Ono, Hiroshi Funakubo, Takayoshi Sasaki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We investigated dielectric properties of La_1-xEu _xNb₂O7 perovskite nanosheets in order to study the effect of A-site modification on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, A-site modification with Eu³⁺ ions improves the leakage current characteristics and, at the same time, reduces permittivity. The slight modification with Eu₃₊ ions in La_0.95Nb ₂O₇ nanosheets causes a 50% reduction in ε_r value. We also discuss the high-κ properties of La _0.95Nb₂O₇ nanosheets by performing detailed investigations based on first-principles calculations and interfacial structures.

Original language	English
Article number	09MA01
Journal	Japanese Journal of Applied Physics
Volume	49
Issue number	9 PART 2
DOIs	https://doi.org/10.1143/JJAP.49.09MA01
Publication status	Published - 2010 Sept
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "A-site-modified perovskite nanosheets and their integration into high-κ dielectric thin films with a clean interface",

abstract = "We investigated dielectric properties of La1-xEu xNb2O7 perovskite nanosheets in order to study the effect of A-site modification on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, A-site modification with Eu3+ ions improves the leakage current characteristics and, at the same time, reduces permittivity. The slight modification with Eu3+ ions in La0.95Nb 2O7 nanosheets causes a 50% reduction in εr value. We also discuss the high-κ properties of La 0.95Nb2O7 nanosheets by performing detailed investigations based on first-principles calculations and interfacial structures.",

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AU - Li, Bao Wen

AU - Osada, Minoru

AU - Ozawa, Tadashi C.

AU - Akatsuka, Kosho

AU - Ebina, Yasuo

AU - Ma, Renzi

AU - Ono, Kanta

AU - Funakubo, Hiroshi

AU - Sasaki, Takayoshi

PY - 2010/9

Y1 - 2010/9

N2 - We investigated dielectric properties of La1-xEu xNb2O7 perovskite nanosheets in order to study the effect of A-site modification on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, A-site modification with Eu3+ ions improves the leakage current characteristics and, at the same time, reduces permittivity. The slight modification with Eu3+ ions in La0.95Nb 2O7 nanosheets causes a 50% reduction in εr value. We also discuss the high-κ properties of La 0.95Nb2O7 nanosheets by performing detailed investigations based on first-principles calculations and interfacial structures.

AB - We investigated dielectric properties of La1-xEu xNb2O7 perovskite nanosheets in order to study the effect of A-site modification on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, A-site modification with Eu3+ ions improves the leakage current characteristics and, at the same time, reduces permittivity. The slight modification with Eu3+ ions in La0.95Nb 2O7 nanosheets causes a 50% reduction in εr value. We also discuss the high-κ properties of La 0.95Nb2O7 nanosheets by performing detailed investigations based on first-principles calculations and interfacial structures.

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A-site-modified perovskite nanosheets and their integration into high-κ dielectric thin films with a clean interface

Abstract

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