| 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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| 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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