2017 Fiscal Year Final Research Report
Influence of charge states on structure and property of ferroelectric interfaces
| Project/Area Number |
15H04145
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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 |
Structural/Functional materials
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
栃木 栄太 東京大学, 大学院工学系研究科(工学部), 助教 (50709483)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | ドメインウォール / 強誘電体 / 双結晶 / ひずみ / 電気伝導 |
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| Outline of Final Research Achievements |
Physical and chemical properties of crystalline materials are dependent on atomic structure of interfaces between neighboring crystals. This is true for charged interfaces such as ferroelectric domain-walls or boundaries. Accordingly, it is essential to investigate relationship between atomic structures of the interfaces and their properties. However, only a little is known about the relationship because it is difficult to perform systematic study on the charged interfaces. In this study, we artificially fabricated charged interfaces using the bicrystal method, analyzed their structure by transmission electron microscopy and evaluated the electric properties by scanning probe microscopy. It was found that the electrical conductivity at charged interfaces depends on their structures and charge states. Dislocations at the interfaces do not affect their property so much if the density is low. In contrast, polarization states at interfaces strongly influence the electrical conductivity.
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| Free Research Field |
結晶格子欠陥
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