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
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 遍歴メタ磁性 / 重い電子系 / 熱電係数 / メタ磁性 |
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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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Report
(4 results)
Research Products
(24 results)
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[Journal Article] Unstable spin-ice order in the stuffed metallic pyrochlore Pr2+xIr2-xO7-δ2015
Author(s)
D. E. MacLaughlin, O. O. Bernal, Lei Shu, Jun Ishikawa, Yosuke Matsumoto, J.-J. Wen, M. Mourigal, C. Stock, G. Ehlers, C. L. Broholm, Yo Machida, Kenta Kimura, Satoru Nakatsuji, Yasuyuki Shimura, and Toshiro Sakakibara
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Journal Title
PHYSICAL REVIEW B
Volume: 92
Issue: 5
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Anomalous Enhancement of Seebeck Coefficient in Pr-Based 1-2-20 System with Non-Kramers Doublet Ground States2015
Author(s)
Y. Machida, T. Yoshida, T. Ikeura, K. Izawa, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N. Nagasawa, K. Matsumoto, T. Onimaru, T. Takabatake
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Journal Title
Journal of Physics: Conference Series
Volume: 592
Pages: 0120251-9
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Pairing Symmetry of UPt3 Probed by Thermal Transport Tensors2014
Author(s)
K. Izawa, Y. Machida, A. Itoh, Y. So, K. Ota, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, Y. Tsutsumi, and K. Machida
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Journal Title
J. Phys. Soc. Jpn.
Volume: 83
Issue: 6
Pages: 0610131-8
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] Anomalous Enhancement of Seebeck Coefficient in Pr-based 1-2-20 System with Non-Kramers Doublet Ground States2014
Author(s)
Y. Machida, T. Ikeura, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N. Nagasawa, K. T. Matsumoto, T. Onimaru, T. Takabatake, and K. Izawa
Organizer
The International Conference on Strongly Correlated Electron Systems (SCES 2014)
Place of Presentation
Grenoble, France
Year and Date
2014-07-07 – 2014-07-11
Related Report
Invited
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