2017 Fiscal Year Final Research Report
High pressure synthesis of novel ferroelectrics and characterization of structural inhomogeneities using thermal measurements
| Project/Area Number |
15K05137
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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 |
Condensed matter physics I
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
Tachibana Makoto 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 主任研究員 (40442727)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 強誘電性 / 単結晶 / フラックス法 / 熱測定 / 高圧合成 |
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| Outline of Final Research Achievements |
Nanoscale inhomogeneities play fundamental roles in many functional materials. Especially, large piezoelectric effects are found in relaxor ferroelectrics, which is associated with the presence of polar nanoregions and the glasslike thermal behavior of these materials. In this study, high-quality single crystals of relaxor-like K1-xLixTaO3, KTa1-xNbxO3, Bi2WO6, SrBi2Ta2O9, and Bi4Ti3O12 were grown using the flux method, and their thermal conductivity and heat capacity were studied. The results show that these materials do not show glasslike behavior, indicating the absence of polar nanoregions.
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| Free Research Field |
数物系科学
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