2015 Fiscal Year Annual Research Report
| Project/Area Number |
25247056
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| Research Institution | Tohoku University |
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Principal Investigator |
Bauer Gerrit 東北大学, 金属材料研究所, 教授 (10620213)
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| Co-Investigator(Kenkyū-buntansha) |
野村 健太郎 東北大学, 金属材料研究所, 准教授 (00455776)
高橋 三郎 東北大学, 金属材料研究所, 助教 (60171485)
Tretiakov Oleg 東北大学, 金属材料研究所, 助教 (50643425)
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| Project Period (FY) |
2013-04-01 – 2018-03-31
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| Keywords | spintronics / spin caloritronics / nanomechanics / nanomagnetism |
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| Outline of Annual Research Achievements |
In the third year of the project, continued working on the topics started in the first two years.
Following up on the theory of the coupled magnon and phonon transport in perpendicular magnetic structures, we now addressed the lateral magnetization dynamics in magnetic films.
The high light of last year theory of fs laser excited spatiotemporal pump and probe spectroscopy that allowed direct observation of the magnon-polaron, the new quasi-particle formed by strongly coupled magnon and phonon excitations that was published in Phys. Rev. Lett.. We could explain the experiments of the Tokura Group (RIKEN) group quantitatively. Other activities concerned the theory of spin hydrodynamic generation as observed by the Saitoh Group (Tohoku), the magnetization dynamics of natural and artificial antiferromagnets, atomistic spin simulations of gadolinium iron garnet, and electric field induced spin-orbit torques.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The field of spin mechanics has gained much momentum by new experiments in Japan and elsewhere. The conference series started by us has been continued last year in Munich, and "Spin Mechanics 4" will be held in Canada next year.
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| Strategy for Future Research Activity |
The coupling of spin and mechanical angular momentum are addressed by the Landau-Lifshitz-Gilbert (LLG) equation coupled to continuum mechanics to describe (i) the coupled lattice magnetization dynamics of magnetic nanoparticles, (ii) laser-induced spatiotemporal magnet ization dynamics as affected by the magnetoelastic coupling, (iii) Boltzmann-level transport equations for heat and spin currents taking disorder and magnon-phonon interactions, (iv) microscopically motivated atomistic spin simulations
(v) liquid metal flow actuated by spin injection as well as the spin current generation by the flow of liquid metal, and (vi) spin-orbit interaction and (topological) magnetization textures.
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Research Products
(78 results)
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[Journal Article] Origin of the spin Seebeck effect in compensated ferrimagnets2016
Author(s)
Stephan Geprags, Andreas Kehlberger, Francesco Della Coletta, Zhiyong Qiu Er-Jia Guo, Tomek Schulz, Christian Mix, Sibylle Meyer, Akashdeep Kamra, Matthias Althammer, Hans Huebl, Gerhard Jakob, Yuichi Ohnuma, Hiroto Adachi, Joseph Barker, Sadamichi Maekawa, Gerrit E.W. Bauer, Eiji Saitoh, Rudolf Gross, et al.
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Journal Title
NATURE COMMUNICATIONS
Volume: 7
Pages: 10452-1--6
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Spin hydrodynamic generation2016
Author(s)
R. Takahashi, M. Matsuo, M. Ono, K. Harii, H. Chudo, S. Okayasu, J. Ieda, S. Takahashi, S. Maekawa, and E. Saitoh
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Journal Title
Nature Physics
Volume: 12
Pages: 52-56
DOI
Peer Reviewed / Acknowledgement Compliant
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[Presentation] スピン流が人工反強磁性体に及ぼす影響の研究Ⅲ2015
Author(s)
田中健勝, 森山貴広, 永田真己, 水野隼翔, 関剛斎, 高梨弘毅, 千葉貴裕, 高 橋三郎, Gerrit E. W. Bauer, 小野輝男
Organizer
第39回 日本磁気学会学術講演会 日本物理学会秋季大会
Place of Presentation
関西大学、日本
Year and Date
2015-09-16 – 2015-09-19
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[Presentation] スピン流が人工反強磁性体に及ぼす影響の研究2015
Author(s)
田中健勝, 森山貴広, 永田真己, 水野隼翔, 関剛斎, 高梨弘毅, 千葉貴裕, 高 橋三郎, Gerrit E. W. Bauer, 小野輝男
Organizer
第39回 日本磁気学会学術講演会
Place of Presentation
名古屋大学、日本
Year and Date
2015-09-08 – 2015-09-11
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[Presentation] Antiferromagnetic Skyrmions2015
Author(s)
Oleg A. Tretiakov
Organizer
Condensed Matter Theory Seminar
Place of Presentation
University of Cologne, Cologne, Germany
Year and Date
2015-07-11
Int'l Joint Research / Invited
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[Presentation] Antiferromagnetic Skyrmions2015
Author(s)
Oleg A. Tretiakov
Organizer
International workshop on New Perspectives in Spintronic and Mesoscopic Physics (NPSMP 2015)
Place of Presentation
ISSP, University of Tokyo, Kashiwa, Japan
Year and Date
2015-06-01 – 2015-06-19
Int'l Joint Research / Invited
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