Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer
Abstract A dynamical spin injection based on the ferromagnetic resonance in a ferromagnetic/nonmagnetic bi-layered structure, is a powerful mean for generating and manipulating the spin current. Although the mechanism of the dynamical spin injection is mainly attributed to the spin pumping, the deta...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-03-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-06784-6 |
| _version_ | 1818915615835947008 |
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| author | Sora Obinata Riku Iimori Kohei Ohnishi Takashi Kimura |
| author_facet | Sora Obinata Riku Iimori Kohei Ohnishi Takashi Kimura |
| author_sort | Sora Obinata |
| collection | DOAJ |
| description | Abstract A dynamical spin injection based on the ferromagnetic resonance in a ferromagnetic/nonmagnetic bi-layered structure, is a powerful mean for generating and manipulating the spin current. Although the mechanism of the dynamical spin injection is mainly attributed to the spin pumping, the detailed mechanism and the quantitative understanding for related phenomena are still controversial. As an another important contribution to the dynamical spin injection, the heating effect due to the resonant precessional motion of the magnetization is pointed out recently. In order to quantify the contribution from the heating effect, we here investigate the dynamical spin injection in a CoFeB/Pt/CoFeB trilayer. Although the contribution from the spin pumping diminishes because of the symmetric spin injection from the upper and lower interfaces, a significant inverse spin Hall voltage has been clearly observed. We show that the observed voltage can be quantitatively understood by the thermal spin injection due to a heating effect during the ferromagnetic resonance. A proper combination between the spin pumping and the heat-flow control in the multi-layered system is a key for the efficient dynamical spin injection. |
| first_indexed | 2024-12-20T00:05:06Z |
| format | Article |
| id | doaj.art-13f7b443c8b042208c15392ca7660b23 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T00:05:06Z |
| publishDate | 2022-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-13f7b443c8b042208c15392ca7660b232022-12-21T20:00:40ZengNature PortfolioScientific Reports2045-23222022-03-011211610.1038/s41598-022-06784-6Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayerSora Obinata0Riku Iimori1Kohei Ohnishi2Takashi Kimura3Department of Physics, Kyushu UniversityDepartment of Physics, Kyushu UniversityDepartment of Physics, Kyushu UniversityDepartment of Physics, Kyushu UniversityAbstract A dynamical spin injection based on the ferromagnetic resonance in a ferromagnetic/nonmagnetic bi-layered structure, is a powerful mean for generating and manipulating the spin current. Although the mechanism of the dynamical spin injection is mainly attributed to the spin pumping, the detailed mechanism and the quantitative understanding for related phenomena are still controversial. As an another important contribution to the dynamical spin injection, the heating effect due to the resonant precessional motion of the magnetization is pointed out recently. In order to quantify the contribution from the heating effect, we here investigate the dynamical spin injection in a CoFeB/Pt/CoFeB trilayer. Although the contribution from the spin pumping diminishes because of the symmetric spin injection from the upper and lower interfaces, a significant inverse spin Hall voltage has been clearly observed. We show that the observed voltage can be quantitatively understood by the thermal spin injection due to a heating effect during the ferromagnetic resonance. A proper combination between the spin pumping and the heat-flow control in the multi-layered system is a key for the efficient dynamical spin injection.https://doi.org/10.1038/s41598-022-06784-6 |
| spellingShingle | Sora Obinata Riku Iimori Kohei Ohnishi Takashi Kimura Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer Scientific Reports |
| title | Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer |
| title_full | Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer |
| title_fullStr | Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer |
| title_full_unstemmed | Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer |
| title_short | Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer |
| title_sort | influence of heat flow control on dynamical spin injection in cofeb pt cofeb trilayer |
| url | https://doi.org/10.1038/s41598-022-06784-6 |
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