Control of edge atomic structure of carbon mono-atomic layer and research of spin-based phenomena and magnet application
| Project/Area Number |
24241046
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanomaterials/Nanobioscience
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| Research Institution | Aoyama Gakuin University |
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Principal Investigator |
HARUYAMA Junji 青山学院大学, 理工学部, 准教授 (70296383)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥47,320,000 (Direct Cost: ¥36,400,000、Indirect Cost: ¥10,920,000)
Fiscal Year 2014: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
Fiscal Year 2013: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2012: ¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
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| Keywords | グラフェン / エッジ / 平坦バンド / 強磁性 / 偏極スピン / 水素終端 / 磁石 / スピントロニクス素子 / グラフェンナノメッシュ / 平坦バンド強磁性 / トンネル磁気抵抗素子 / コバルト電極 / TMR比 / 黒リン / ナノメッシュ / エッジ原子配列 / 終端 / 希少元素フリー磁石 / エッジスピン / フラットバンド強磁性 / 磁性元素フリー磁石 / ナノ細孔アレイ |
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| Outline of Final Research Achievements |
We have fabricated graphene nanomesh (GNM), which has honeycomb-like array of nanopores with low defects and low contamination, by non-lithographic method within reproducibility as high as over 70%. Controlling atomic structure of the pore edge to zigzag by critical temperature annealing resulted in realization of flat-band ferromagnetism. High-efficiency GNM magnet, which has the strength was obtained by HSQ resist treatment of this GNM and irradiating electron beam, because mono-hydrogenation of the edge dangling bond was realized through this process. TMR structure was realized by using this magnetic GNM as an electrode and TMR ratio over 20% was realized even at room temperature. These results open doors to rare-magnetic-element free magnets and spintronic devices.
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Report
(4 results)
Research Products
(51 results)
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[Presentation] 黒リン単原子層のエッジ磁性2015
Author(s)
中西雄大, 大畠智佳, 岩城稜麿, 野村くみ子, 江澤雅彦, 篠原久典, 春山純志
Organizer
2014日本物理学会年次大会
Place of Presentation
早稲田大学
Year and Date
2015-03-21 – 2015-03-24
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[Presentation] Novel spintronic phenomena arising from pore-edge polarized spins of ferromagnetic graphene nanomeshes2012
Author(s)
N. Kosugi, Y. Hashimoto, K. Sakuramoto, K. Takeuchi, S.Kamikawa, Y. Yagi, J. Haruyama, Y. Hashimoto, K. Fujita, Y.Kato, S. Katsumoto, Y. Iye, P. Zhao, S. Maruyama, A. Rao
Organizer
第43回フラーレン・ナノチューブ・グラフェンシンポジウム
Place of Presentation
東北大学
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