| 研究課題/領域番号 |
25247056
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| 研究機関 | 東北大学 |
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研究代表者 |
Bauer Gerrit 東北大学, 金属材料研究所, 教授 (10620213)
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| 研究分担者 |
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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| 研究期間 (年度) |
2013-04-01 – 2018-03-31
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| キーワード | spintronics / spin caloritronics / nanomechanics / nanomagnetism |
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| 研究実績の概要 |
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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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
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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| 今後の研究の推進方策 |
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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