Affiliation |
Faculty of Engineering, Division of Intelligent Systems Engineering |
Job Title |
Professor |
Research Fields, Keywords |
spintronics, Brillouin light scattering, magnonics, magnetism |
The Best Research Achievement in Research Career 【 display / non-display 】
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【Published Thesis】 Time-domain Measurement of Current-induced Spin Wave Dynamics 2011.01
【Awards】 文部科学大臣表彰若手科学者賞 2015.04
【Published Thesis】 Spin Wave Propagation in Cubic Anisotropy Materials 2017.06
Degree 【 display / non-display 】
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Doctor of Science - Keio University
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Master of Science - Keio University
Campus Career 【 display / non-display 】
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2021.4
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
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2018.4-2021.3
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
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2021.4
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Professor
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2021.4
Concurrently Yokohama National UniversityGraduate School of Engineering Department o Physics, Electrical and Computer Engineering Professor
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2021.4
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Professor
Books 【 display / non-display 】
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スピン波ドップラー効果とマグノン制御
( Role: Sole author)
応用物理学会
Language:Japanese Book type:Scholarly book
応用物理83巻3号
Thesis for a degree 【 display / non-display 】
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ナノスケール強磁性体におけるスピン依存量子伝導機構の研究
関口 康爾
2007.3
Doctoral Thesis Single Work [Reviewed]
ナノスケール強磁性体におけるスピン自由度に依存した電気伝導量子化が生じること、Aharonov-Bohm効果にスピン依存効果が出ることを示した。
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強磁性極微細線におけるスピン依存量子伝導
関口 康爾
2004.3
Master Thesis Single Work [Reviewed]
原子スケールの強磁性細線では、電気伝導度がスピンに依存して量子化すること、巨大な磁気抵抗効果が出現することを明らかにした。
Papers 【 display / non-display 】
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Propagating backward-volume spin waves in epitaxial Fe films
Nezu S., Scheike T., Sukegawa H., Sekiguchi K.
AIP ADVANCES 12 ( 3 ) 035320-1 - 035320-6 2022.3 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Spin-wave switching using dynamic magnonic crystal
Iwaba Masashi, Sekiguchi Koji
APPLIED PHYSICS EXPRESS 14 ( 7 ) 073002-1 - 073002-5 2021.7 [Reviewed]
Language:English Publishing type:Research paper (scientific journal) Joint Work
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Nezu S., Sekiguchi K.
Transaction of the Magnetics Society of Japan Special Issues 5 ( 1 ) 6 - 9 2021.5
Language:Japanese Publishing type:Research paper (scientific journal) Publisher:The Magnetics Society of Japan Joint Work
<p> The spin-wave propagation characteristics in ferromagnetic thin films with a multi-domain state were investigated by micromagnetic simulations and electrical measurements. The simulations showed that the spin waves propagated along the domain wall when excited at low frequencies. The resonance frequency shifted to a higher frequency when an external magnetic field was applied normal to the waveguide. By using a vector network analyzer, spin-wave propagation at the predicted resonance frequency was detected. The external magnetic field dependence of the resonance frequency agreed with the simulation result.</p>
Other Link: https://ci.nii.ac.jp/naid/130008033615
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磁壁おけるスピン波伝播の研究
関口 康爾
日本磁気学会誌 - 2021 [Reviewed]
Language:The in addition, foreign language Publishing type:Research paper (scientific journal) Single Work
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Strong Absorption Effect for Propagating Backward Spin-Waves by Double Magnonic Crystal
Iwaba M., Fujiwara S., Sekiguchi K.
Transaction of the Magnetics Society of Japan Special Issues 4 ( 1 ) 18 - 22 2020.5
Language:Japanese Publishing type:Research paper (scientific journal) Publisher:The Magnetics Society of Japan Joint Work
Other Link: https://ci.nii.ac.jp/naid/130007802673
Review Papers 【 display / non-display 】
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The Basis of Magnon Transistors
K. Sekiguchi
AAPPS Bulletin 28, 2 (2018). 2018
Language:English Publishing type:Article, review, commentary, editorial, etc. (international conference proceedings)
Grant-in-Aid for Scientific Research 【 display / non-display 】
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マグノニック機能創発のための電圧効果と凝縮効果の研究
2019.4
科学研究費補助金 Grant-in-Aid for Scientific Research(A)
Investigator(s):関口康爾
Grant type:Competitive
Presentations 【 display / non-display 】
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Magnon transistor for next generation computing (invited)
K. Sekiguchi [Invited]
Magnon transistor for next generation computing MSJ
Event date: 2019.9
Language:English Presentation type:Oral presentation (general)
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Time domain Detection of Multiple Spin-wave Solitons Generation
M. Kawase, M. Iwaba, and K. Sekiguchi
Time domain Detection of Multiple Spin-wave Solitons Generation MORIS2019
Event date: 2019.6
Language:English Presentation type:Oral presentation (general)
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Shape-Forming of Spin Wave Packets by Dynamic Magnonic Crystal
M. Iwaba, K. Sekiguchi,
Shape-Forming of Spin Wave Packets by Dynamic Magnonic Crystal MORSI2019, We-02-2
Event date: 2019.6
Language:English Presentation type:Oral presentation (general)
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Generation of fast propagating spin-wave for magnonic logic functions
K. Sekiguchi [Invited]
Collaborative Conference on Materials Research (CCMR) 2018, 27June. 2018 (invited)
Event date: 2018.6
Language:English Presentation type:Oral presentation (invited, special)
K. Sekiguchi, "Generation of fast propagating spin-wave for magnonic logic functions", Collaborative Conference on Materials Research (CCMR) 2018, 27June. 2018 (invited)
(http://ccmr2018.org/program/) -
Edge-mode Spin-wave Nonreciprocity for Magnonic Logic Functions
K. Sekiguchi [Invited]
5th International Conference of Asian Union of Magnetics Societies (IcAUMS 2018), G4-1399, 7June. 2018 (invited)
Event date: 2018.6
Language:English Presentation type:Oral presentation (invited, special)
K. Sekiguchi, "Edge-mode Spin-wave Nonreciprocity for Magnonic Logic Functions", 5th International Conference of Asian Union of Magnetics Societies (IcAUMS 2018), G4-1399, 7June. 2018 (invited)
(http://www.icaums.org/main/pr_program.htm)
Charge of on-campus class subject 【 display / non-display 】
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2022 Electromagnetism 2
College of Engineering Science
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2022 Electromagnetism 1
College of Engineering Science
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2022 Special Laboratory for Electrical and Computer Engineering
College of Engineering Science
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2022 Laboratory B for Electrical and Computer Engineering
College of Engineering Science
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2022 Laboratory Ⅱ for Electrical and Computer Engineering
College of Engineering Science