| Project/Area Number |
23656219
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Osaka University |
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Principal Investigator |
TONOUCHI Masayoshi 大阪大学, レーザーエネルギー学研究センター, 教授 (40207593)
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| Project Period (FY) |
2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
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| Keywords | テラヘルツ放射 / 強誘電分極 / ナノドメイン / テラヘルツ波 / 強誘電体 / 非線形分光 |
|---|
| Research Abstract |
We studied the temperature dependence of the dielectric dispersion of SrTiO3 thin films on MgAl2O4 by broadband THz-TDS and we found evidence of a ferroelectric phase transition at around 170 K. Furthermore, the increase ofε" in the gigahertz frequency region and the increase ofγTO1 below T_c imply the existence of polar nanoregions that have been observed in other ferroelectric materials with a perovskite structure and relaxor ferroelectrics.
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