2015 Fiscal Year Final Research Report
Low temperature thermoelectric study on metamagnetism
| Project/Area Number |
25400361
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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 II
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
Machida Yo 東京工業大学, 理工学研究科, 助教 (40514740)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | 遍歴メタ磁性 / 重い電子系 / 熱電係数 |
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| Outline of Final Research Achievements |
Metamagnetism in itinerant f-electron systems has been studied by means of low-temperature thermoelectric coefficients. In the heavy-fermion metamagnet YbCo2Zn20, the Seebeck coefficient is found to be gigantic, which is among the largest known for metals. An application of magnetic field gives rise to a dramatic reduction of the large Seebeck coefficient towards the metamagnetic field. In addition to a low Kondo energy scale, the presence of an extremely low energy scale possibly originated from antiferromagnetic correlation and its peculiar band dependence are likely sources of the enhanced thermoelectric responses. Moreover, a field collapse of such an intriguing correlation is intimately related to the metamagnetism.
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| Free Research Field |
低温物理
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