| Project/Area Number |
17K14802
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
Sepehri-Amin Hossein 国立研究開発法人物質・材料研究機構, 磁性・スピントロニクス材料研究拠点, 主幹研究員 (10621758)
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| Project Period (FY) |
2017-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | Spin torque oscillator / MAMR / spin polarization / spin accumulation / Simulations / Microstructure / spin-torque-oscillator / Micromagnetic simulation / Microstructure analysis / Magnetic recording / Magnetism / magnetic-recording / device analysis |
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| Outline of Final Research Achievements |
Microwave assisted magnetic recording (MAMR) is a promising technology to overcome the stagnated areal density increase of hard disk drives. However, its most essential part, spin-torque-oscillator (STO), has not been realized due to the lack of fundamental studies. In this work, we combined a novel micromagnetic simulation, device fabrications/analysis, and advanced structure/interface characterizations to design material/geometry for the STO devices with desired performance for MAMR. This innovative fundamental research lead to design and experimental demonstration of a new type of STO, all-in-plane STO for MAMR. We experimentally demonstrated the dynamics of the out-of-plane precession (OPP) mode oscillation for field generating layer with oscillation cone angle of 70o and frequency of 16 GHz. This fundamental study not only had a great academic impact but also has attracted a great attention from media industry.
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| Academic Significance and Societal Importance of the Research Achievements |
We successfully proposed and demonstrated a novel design of spin torque oscillator for the next generation of magnetic recording technology. This is important for our society to overcome the data storage capacity crisis. This work had a great impact in academia as well as HDD industries.
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