Theoretical research for microscopic understanding and visualization of the spin Seebeck effect
Project/Area Number |
15K05151
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | Okayama University (2016-2018) Japan Atomic Energy Agency (2015) |
Principal Investigator |
ADACHI Hiroto 岡山大学, 異分野基礎科学研究所, 准教授 (10397903)
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Project Period (FY) |
2015-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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Keywords | スピンゼーベック効果 / スピン流 / 熱流 / マグノン / 熱電発電 / スピン波 / スピンホール効果 |
Outline of Final Research Achievements |
Spin Seebeck effect refers to the generation of spin current by a heat current applied to a magnet. In this project, we have theoretically investigated the spin Seebeck effect near the magnetic phase transition point. By means of a model calculation using a time-dependent Ginzburg-Landau equation, we have shown that in both ferromagnets and antiferromagnets, the spin Seebeck effect signal is proportional to the magnetization in the sample.
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Academic Significance and Societal Importance of the Research Achievements |
本研究課題で対象とするスピンゼーベック効果は、磁性体の熱エネルギーから非磁性体にスピン流を注入する現象であり、2008年に日本で発見されて以降、新しく簡便なスピン流の生成手法として大変大きな注目を集めている。この現象の磁気転移点近傍での振る舞いを明らかとすることは、学術的には、スピンゼーベック効果に対する我々の理解が正しいか否かの一つの判定基準となる。また応用上でも、スピンゼーベック効果を高温領域で使用する際のデバイスの設計指針を与えることに繋がる。このように、本研究課題で明らかとした磁気転移点近傍でのスピンゼーベック効果の振る舞いは極めて大きな意義を持っている。
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Report
(5 results)
Research Products
(23 results)
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[Journal Article] Origin of the spin Seebeck effect in compensated ferrimagnets2016
Author(s)
S. Geprgs, A. Kehlberger, F. D. Coletta, Z. Qiu, E. J. Guo, T. Schulz, C. Mix, S. Meyer, A. Kamra, M. Althammer, H. Huebl, G. Jakob, Y. Ohnuma, H. Adachi, J. Barker, S. Maekawa, G. E. W. Bauer, E. Saitoh, R. Gross, S. T. B. Goennenwein, and M. Klaeui
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Journal Title
Nature Communications
Volume: 7
Issue: 1
Pages: 10452-10452
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers2015
Author(s)
R. Ramos, T. Kikkawa, M. H. Aguirre, I. Lucas, A. Anadon, T. Oyake, K. Uchida, H. Adachi, J. Shiomi, P. A. Algarabel, L. Morellon, S. Maekawa, E. Saitoh, and M. R. Ibarra
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Journal Title
Physical Review B
Volume: 92
Issue: 22
Pages: 220407-220407
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Spin pumping into superconductors2016
Author(s)
Masashi Inoue, Hiroto Adachi, and Masanori Ichioka
Organizer
International School on Spintronics & Spin-Orbitronics
Place of Presentation
Kyushu University, Fukuoka
Year and Date
2016-12-16
Related Report
Int'l Joint Research
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