Magnetic microscopy via acoustic excitation and acoustically excited spin dynamics
| Project/Area Number |
17H02808
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General applied physics
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
Ikushima Kenji 東京農工大学, 工学(系)研究科(研究院), 教授 (20334302)
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| Co-Investigator(Kenkyū-buntansha) |
田川 義之 東京農工大学, 工学(系)研究科(研究院), 准教授 (70700011)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2019: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2017: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Keywords | 磁性 / 超音波 / 非破壊検査 / 物性実験 / 計測工学 |
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| Outline of Final Research Achievements |
The purpose of this work is to develop magnetic microscopy techniques using acoustically stimulated electromagnetic (ASEM) method and to investigate local spin dynamics induced by ultrasound waves. In particular, we aim to obtain local magnetic hysteresis parameter such as coercivity and hysteresis loss in bulk materials. Our results are that (1) we found that the dynamical magnetic loss as well as coercivity and hysteresis loss is obtained by analyzing the phase shift in the ASEM response signals, (2) microscopic images of magnetic domain structures are successfully obtained by using high-frequency ultrasound probe, and (3) we demonstrate the inspection of defects in thin steel plates or the evaluation and visualization of residual stress in steel products by irradiating ultrasound waves.
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| Academic Significance and Societal Importance of the Research Achievements |
超音波を利用した磁気顕微・画像化技術（音響誘起電磁法）は、新規磁性材料や磁性薄膜の評価、および鋼材等の非破壊検査への実用的貢献が期待される。本研究では、特に、非破壊検査応用に着目し、超音波で得られる鋼材の局所磁気ヒステリシス曲線を測定・分析した。その結果、高効率モーターに利用されている珪素鋼板（電磁鋼板）のエネルギー損失の評価や鋼材欠陥や残留応力分布を可視化することに有望であることが見出された。さらには最近、生体組織においても同様の音響誘起電磁信号が観測され、この超音波による変調・検出技術は、インフラ・鉱工業、素材・医療分野など、広範囲の応用が期待される。
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Report
(4 results)
Research Products
(175 results)
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[Journal Article] Visualization of penetration of a high-speed focused microjet into gel and animal skin2019
Author(s)
Kiyama, A., Endo, N., Kawamoto, S., Katsuta, S., Oida, K., Tanaka, A., and Tagawa, Y.
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Journal Title
Journal of Visualization
Volume: -
Issue: 3
Pages: 1-9
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Growth dynamics of surface nanodroplets during solvent exchange at varying flow rates2018
Author(s)
Dyett, B., Kiyama, A., Rump, M., Tagawa, Y., Lohse, D., and Zhang, X.
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Journal Title
Soft Matter
Volume: 14
Issue: 25
Pages: 5197-5204
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Cavitation onset of an accelerating liquid2017
Author(s)
Kiyama, A., Pan, Z., Tagawa, Y., Jesse, D.D., Thomson, S., Hurd, R., and Truscott, T.
Organizer
70th Annual Meeting of the American Physical Society Division of Fluid Dynamics
Related Report
Int'l Joint Research
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[Presentation] High-speed impact of the focused micro liquid jet onto liquid pool2017
Author(s)
Kiyama, A., Miyazaki, Y., Pan, Z., Mansoor, M. M., Truscott, T. T., and Tagawa, Y.
Organizer
17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery and 2nd International Symposium on Image based Metrology
Related Report
Int'l Joint Research
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