Development of high-efficiency techniques of microwave-assisted magnetization switching
| Project/Area Number |
26289083
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Tohoku University |
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Principal Investigator |
Okamoto Satoshi 東北大学, 多元物質科学研究所, 准教授 (10292278)
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| Co-Investigator(Kenkyū-buntansha) |
島津 武仁 東北大学, 学際科学フロンティア研究所, 教授 (50206182)
北上 修 東北大学, 多元物質科学研究所, 教授 (70250834)
菊池 伸明 東北大学, 多元物質科学研究所, 助教 (80436170)
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| Research Collaborator |
SATO KIMINORI 富士電機(株)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
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| Keywords | スピンダイナミクス / 磁気記録 / 磁気共鳴 |
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| Outline of Final Research Achievements |
In this study, we have investigated various approaches to improve the efficiency of microwave-assisted magnetization switching effect. First, we successfully developed novel quantitative evaluation methods for large cone angle magnetization precession in a nano-scale magnetic dot based on anomalous Hall effect (AHE) and x-ray magnetic circular dichroism (XMCD) detection techniques. Then, we studied the microwave-assisted magnetization switching against various factors, such as the interlayer coupling in a dot composed of two magnetic layers, the effective gyromagnetic ratio in ferromagnetic materials, and inter-grain magnetic interaction in granular magnetic films. It is well verified that these factors can be significantly modify the microwave-assisted switching behavior. These findings are beneficial for practical application of the microwave-assisted magnetization switching.
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Report
(4 results)
Research Products
(24 results)
