2014 Fiscal Year Final Research Report
Fabrication of ferroelectric tunnelling junction memory using ferroelectric polymer ultrathin film
| Project/Area Number |
25790053
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | Tokyo University of Science (2014)
Tohoku University (2013) |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | 強誘電体薄膜 / 高分子 / 抵抗変化 / 不揮発性メモリ |
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| Outline of Final Research Achievements |
In this project, the research has been done for understanding a polarization-induced resistive switching phenomenon in ferroelectrics and establishing a nonvolatile memory. We observed a clear polarization reversal-induced resistance switching effect in ferroelectric Vinylidene-fluoride (VDF)/Trifluoroethylene (TrFE) copolymer thin films. Pt and Au were used as the bottom and top electrodes, respectively, and the thickness of the VDF/TrFE copolymer film was adjusted to be 10 nm. The conduction current was 100 times higher in the case of the spontaneous polarization of the VDF/TrFE film towards the Au electrode than that in the case of the opposite direction. This resistance switching was confirmed to be reproducible after 10 successive polarization reversals. Thus, we concluded that the film based on the structure can work as a novel resistive switching memory.
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| Free Research Field |
強誘電体、高分子電気物性
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