Exploration and crystallochemical tuning of novel antiferroelectric layered oxides through a coupling of theory and experiments
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- Akamatsu Hirofumi
- Principal Investigator
- 九州大学
About this project
- Japan Grant Number
- JP18H01892
- Funding Program
- Grants-in-Aid for Scientific Research
- Funding organization
- Japan Society for the Promotion of Science
- Project/Area Number
- 18H01892
- Research Category
- Grant-in-Aid for Scientific Research (B)
- Allocation Type
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- Single-year Grants
- Review Section / Research Field
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- Basic Section 30010:Crystal engineering-related
- Research Institution
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- Kyushu University
- Project Period (FY)
- 2018-04-01 〜 2022-03-31
- Project Status
- Completed
- Budget Amount*help
- 17,420,000 Yen (Direct Cost: 13,400,000 Yen Indirect Cost: 4,020,000 Yen)
Research Abstract
In this study, novel layered perovskite ferroelectrics and antiferroelectrics were discovered. Dion-Jacobson-type layered perovskites CsNdNb2O7 and RbNdNb2O7 exhibit ferroelectricity at room temperature. CsNdNb2O7 exhibits a paraelectric-ferroelectric phase transition at 625 K. On the other hand, the Ruddlesden-Popper type layered perovskite Li2SrNb2O7 was found to exhibit antiferroelectricity below 200 K. The main difference between these layered perovskites is the interlayer structure, suggesting that their dielectric properties can be controlled by tuning the interlayer structures.
Details 詳細情報について
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- CRID
- 1040282256969632128
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- Text Lang
- ja
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- Data Source
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- KAKEN
- IRDB
