| Project/Area Number |
16K06321
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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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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Niigata Institute of Technology |
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Principal Investigator |
KANAI YASUSHI 新潟工科大学, 工学部, 教授 (00251786)
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| Co-Investigator(Renkei-kenkyūsha) |
GREAVES Simon
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| Research Collaborator |
MURAOKA Hiroaki
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 高周波アシスト磁気記録 / スピントルク発振素子 / 記録ヘッド / マイクロマグネティック解析シミュレーション / マイクロマグネティック解析 / 垂直記録媒体 / ライトヘッド / スピントルク発振器 / 垂直磁気記録 / 磁気記録 / 磁気記録ヘッド |
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| Outline of Final Research Achievements |
Spin-torque oscillator (STO) and write head used for microwave-assisted magnetic recording (MAMR), one candidate for the future perpendicular magnetic recording, was investigated by using a computer simulation called micromagnetic simulation. We found that (1) once STO was inserted into write head main pole and trailing shield gap, it was hard to obtain a stable oscillation. Therefore, obtaining a stable STO oscillation is the key to realize the MAMR technology. To obtain a stable STO oscillation (2) small area STO had comparably large high-frequency field for its small area and oscillated stably, (3) STO tilted with regard to the medium surface oscillation stably, (4) non-parallel write head gap lead to a stable STO oscillation.
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| Academic Significance and Societal Importance of the Research Achievements |
現代社会は膨大なディジタルデータの蓄積と利用で成り立っている。生み出されるディジタルデータのうち、保存先のほとんどはハードディスクであり、その割合は全体の８０％とも９０％とも言われる。今回の成果が製品につながれば、媒体の枚数（したがってヘッド数）を増やすことなく記憶容量を現状の３倍程度にすることができる。これは単純に同じコストで３倍のデータを保存できるだけではなく、同じ消費電力で３倍のデータを保存でき、省エネルギーにもつながる。
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