A-Site-Modified Perovskite Nanosheets and Their Integration into High-$\kappa$ Dielectric Thin Films with a Clean Interface
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概要
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We investigated dielectric properties of La1-xEuxNb2O7 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 La0.95Nb2O7 nanosheets causes a 50% reduction in $\varepsilon_{\text{r}}$ value. We also discuss the high-$\kappa$ properties of La0.95Nb2O7 nanosheets by performing detailed investigations based on first-principles calculations and interfacial structures.
- 2010-09-25
著者
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Ono Kanta
Institute For Material Structure Science High Energy Accelerator Research Organization
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Funakubo Hiroshi
Department Of Innovative And Engineered Materials
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Osada Minoru
International Center for Materials Nanoarchitectonics, National Institute for Materials Science
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SASAKI Takayoshi
International Center for Materials Nanoarchitectonics
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Sasaki Takayoshi
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Li Bao-Wen
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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Ozawa Tadashi
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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Ebina Yasuo
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Ebina Yasuo
International Center for Materials Nanoarchitectonics (MANA) and Nanoscale Materials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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Akatsuka Kosho
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Ma Renzi
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Osada Minoru
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Osada Minoru
International Center for Materials Nanoarchitectonics (MANA) and Nanoscale Materials Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
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Li Bao-Wen
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Ozawa Tadashi
International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
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Funakubo Hiroshi
Department of Innovative and Engineered Material, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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