| Project/Area Number |
19K05257
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 29010:Applied physical properties-related
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
SEPEHRI-AMIN H. 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) |
2019-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | Magnetic Recording / Spin torque oscillator / Recording media / Micromagnetic simulation / Microstructure / magnetic recording / spin torque oscillator / Micromagnetic Simulation / spin accumulation / spin polarization / granular media / Spin Torque Oscillator / spin-torque-oscillator / Media / device analysis |
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| Outline of Research at the Start |
We will provide new understanding on materials selection/design of STO and media for MAMR. The success of this research proposal will enable us to demonstrate, for the first time in the world, STO device and media for MAMR as the next generation of HDDs with a real density>2 Tb/in2.
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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 (HDD). However, its most essential part, “spin-torque-oscillator (STO)”, has not been realized. We succeeded in development of a novel STO satisfying the requirement of MAMR. We employed advanced micromagnetic simulations and designed a novel STO; all-in-plane (AIP)-STO. The designed STO was fabricated experimentally. We successfully studied the complex magnetization dynamics of AIP-STO by developing a new analysis method using injection locking to an external microwave field. The second fold of this research is design and development of media material for next generation recording technology. We developed TEM image based micromagnetic simulator enabling high throughput evaluation of nanodefects and micromagnetic parameters of media. Our achievements had a great impact in academia as well as HDD industries.
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| Academic Significance and Societal Importance of the Research Achievements |
This work provided guidelines toward realization of next generation magnetic recording technology with a great impact in academia and data storage industries. This study will has paved a way to increase the data storage capacity of hard disks which is important factor for realization of society 5.0
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