2013 Fiscal Year Final Research Report
Study of fractal dynamics in relaxor ferroelectrics
| Project/Area Number |
23340082
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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 |
Condensed matter physics I
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| Research Institution | Ritsumeikan University (2012-2013)
Tohoku University (2011) |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | リラクサー / 強誘電体 / フラクタル / 光散乱 / 自己相似 / 巨大応答 |
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| Research Abstract |
Relaxors are well known to exhibit large dielectric response in a wide range of temperature, but its physical origin is still not clear. In this research, we used broadband light scattering technique to elucidate the meso-scale dynamics in relaxors, paying special attention on the relationship between the fractal in single crystalline samples and thier large dielectric responses. Consequently, we have found that most relaxors exhibit self-similar quasielastic light scattering phenomenon, which directlly indicate the existens of fractals (self-similar structure in real space) inside the single crystalline matrix. We also found that that it was the clusters of polar nano-regions that consists the fracal. We pointed out that the fractal dynamics of the polar nano-region clusters could account for the dielectric responses of relaxors.
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