Study of cation vacancies in ferroelectric perovskite oxides and their effects on the ferroelectric properties
| Project/Area Number |
24560826
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Osaka University |
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Principal Investigator |
ARAKI HIDEKI 大阪大学, 工学(系)研究科(研究院), 教授 (20202749)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 格子欠陥 / 強誘電性 / ペロブスカイト構造 / 原子空孔 |
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| Outline of Final Research Achievements |
Ferroelectric perovskite oxides have excellent properties and are used as infrared ray sensor, piezoelectric actuator, non-volatile memory and so on. In some recent studies it was inferred on slight evidences that the cation vacancies often influence ferroelectric properties in the perovskite oxides, but there has been no unambiguous identification of cation vacancies. In this work we have studied, with positron annihilation spectroscopy, the cation vacancies in perovskite oxides, and conclusively demonstrated that not only A-site vacancy but also B-site vacancy are formed in the oxides.
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Report
(4 results)
Research Products
(5 results)
