2022 Fiscal Year Final Research Report
time-resolved magnetoresistance using microwave complex conductivity measurement
| Project/Area Number |
21K14693
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 35030:Organic functional materials-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Keywords | 磁気抵抗効果 / 有機材料 / COF |
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| Outline of Final Research Achievements |
In order to observe magnetoresistance from organic semiconducting polymers, chemically doped polymers and covalent organic framework (COF) were newly designed.
We observed high electrical conductivity in doped polymers where the polaron binding energy decreased upon increase in the doping level. In the COF materials, integrated pyrene moiety in the skeleton was replaced with aza-pyrene to reduce steric hindrance, resulted in higher electrical conductivity.
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| Free Research Field |
有機材料
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| Academic Significance and Societal Importance of the Research Achievements |
磁気抵抗効果は、外部磁場の印加に伴って電気抵抗が変化する現象であり、近年では、無機材料に限らず有機半導体材料においても磁気抵抗効果が観測されつつある。通常このような磁気抵抗効果は特に有機材料に関して低温でしか観測できなかったが、特殊な材料系では高温領域にまで明確な磁気抵抗効果が見られており、その電子状態について興味が持たれる。電気伝導性を有する高分子材料の評価によって、電気伝導機構に関して情報を得ることができた。磁気抵抗効果の観測により、さらなる機構解明に役立てることができる。
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