| Presentation | 2023-06-09 Spin-current driven permeability control for time-varying magnetic metamaterials Toshiyuki Kodama, Nobuaki Kikuchi, Satoshi Okamoto, Seigo Ohno, Satoshi Tomita, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We study permeability (μ) variation of a lithographically-prepared magnetic meta-atom consisting of Ta/Py/Pt trilayers by means of spin-torque ferromagnetic resonance (ST-FMR).With an injection of a direct current up to ±20 mA together with an alternating current in GHz frequencies, the meta atom under external magnetic fields shows significant changes in position and width of ST-FMR signals due to a massive spin-current injection. This leads to the spin-current driven μ variation, which is verified by analytical calculation based upon the experimentally obtained resonance field and Gilbert damping parameter. The present study paves a way to time-varying spintronic metamaterials with a high modulation frequency for realizing microwave sources toward the post-5th generation mobile communication system. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Metamaterial / Spin torque ferromagnetic resonance / time-varying permeability / spin injection / time-varying |
| Paper # | MRIS2023-6 |
| Date of Issue | 2023-06-01 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2023/6/8(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tohoku Univ. （RIEC) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Recording system, head, media, etc |
| Chair | Ikuya Tagawa(Tohoku Inst. of Tech.) / 町田 賢司(NHK) |
| Vice Chair | |
| Secretary | (Ehime Univ.) / (Samsung) |
| Assistant | Nobuaki Kikuchi(Tohoku Univ.) / Toshiki Yamaji(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Group on Multi-media Storage |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Spin-current driven permeability control for time-varying magnetic metamaterials |
| Sub Title (in English) | |
| Keyword(1) | Metamaterial |
| Keyword(2) | Spin torque ferromagnetic resonance |
| Keyword(3) | time-varying permeability |
| Keyword(4) | spin injection |
| Keyword(5) | time-varying |
| 1st Author's Name | Toshiyuki Kodama |
| 1st Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 2nd Author's Name | Nobuaki Kikuchi |
| 2nd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 3rd Author's Name | Satoshi Okamoto |
| 3rd Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 4th Author's Name | Seigo Ohno |
| 4th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 5th Author's Name | Satoshi Tomita |
| 5th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| Date | 2023-06-09 |
| Paper # | MRIS2023-6 |
| Volume (vol) | vol.123 |
| Number (no) | MRIS-65 |
| Page | pp.pp.32-36(MRIS), |
| #Pages | 5 |
| Date of Issue | 2023-06-01 (MRIS) |