2022 Fiscal Year Final Research Report
Antiferromagnetic spintronics in an organic crystal composed of light elements
| Project/Area Number |
20K20890
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 13:Condensed matter physics and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2020-07-30 – 2023-03-31
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| Keywords | 有機磁性体 / 軽元素 / 反強磁性 / 熱輸送 / スピントロニクス |
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| Outline of Final Research Achievements |
In this study, we focus on organic antiferromagnets to explore new material systems to study spintronics. In order to investigate heat conduction by magnons, which are magnetic excitations produced by antiferromagnetic ordering, we performed heat transport measurements in κ-(ET)2Cu[N(CN)2]Cl and β'-(ET)2ICl2. The results revealed the presence of heat conduction by antiferromagnetic magnons in both salts. This result is the first detection of a remarkable magnetothermal transport phenomenon in quasi-two-dimensional organic antiferromagnets, and indicates that organic magnets are promising material systems for antiferromagnetic spintronics.
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| Free Research Field |
物質科学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、物質内の磁気的な自由度を制御するスピントロニクスにおいて、その新しい舞台として有機物反強磁性体が有用な候補であることを示した。有機磁性体は炭素や水素をなどの軽元素から構成されるため、スピン軌道相互作用が弱く、さらにクリーンな系であるため、物質内でスピンが長距離伝搬できる可能性がある。本研究ではバルク結晶を用いた熱伝導測定を行い、格子振動だけでなく反強磁性に特有の磁気励起も熱を運ぶことを明らかにした。
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