2015 Fiscal Year Final Research Report
Spin Seebeck effect and anisotropic thermoelectric conversion in magnetic superlattice structures
| Project/Area Number |
26600067
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied materials
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | スピントロニクス / スピン流 / スピンゼーベック効果 / 逆スピンホール効果 / 異常ネルンスト効果 / 薄膜 / 磁性体 |
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| Outline of Final Research Achievements |
In this research project, to dramatically improve the efficiency of thermoelectric conversion driven by a spin current, we investigated thermoelectric properties of the spin Seebeck effect in magnetic multilayer structures. We found that, in multilayer films comprising a ferrimagnetic insulator and a paramagnetic metal, the thermoelectric voltage induced by the spin Seebeck effect monotonically and substantially increases with increasing the number of the stacked layers. Based on systematic experimental results and phenomenological analyses, we developed strategies to further enhance the thermopower. In addition, by using multilayer films comprising ferromagnetic and paramagnetic metals, we also demonstrated that the thermoelectric voltage induced by the anomalous Nernst effect monotonically increases with increasing the interface density.
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| Free Research Field |
スピントロニクス
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