2012 Fiscal Year Final Research Report
Control and analysis of giant polarization generated by electron migration
| Project/Area Number |
22360269
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TUSUMI Takaaki 東京工業大学, 大学院・理工学研究科, 教授 (70188647)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEDA Hiroaki 東京工業大学, 大学院・理工学研究科, 准教授 (00324971)
HOSHINA Takuya 東京工業大学, 大学院・理工学研究科, 助教 (80509399)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 誘電体 / 分極 / 人工超格子 / キャパシタ / セラミックス |
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| Research Abstract |
It is necessary to enhance polarization to obtain new materials with giant dielectric constants. Polarization is given by the product of charge and its displacement. We tried to enhance the polarization using migration of electrons in the artificial structures. Two kind of artificial structures, artificial superlattices with two conductive atomic layers and imhomogenous structure formed by spinodal decomposition, were formed, and found that the electron migration in these artificial structures enhance the polarization, giving rise to an marked increase of dielectric constants. The similar enhancement was observed when the ionic migration in a solid electrolyte was use to generate polarization.
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