KEIO RESEARCHERS INFORMATION SYSTEM

Career 【 Display / hide 】

Career 【 Display / hide 】

• 2002.04

  -

  2004.09

  日本学術振興会, 特別研究員(DC1)

• 2004.09

  -

  2007.03

  北海道大学, 電子科学研究所, 助手

• 2007.04

  -

  2013.09

  北海道大学, 電子科学研究所, 助教

• 2009.10

  -

  2013.03

  科学技術振興機構, さきがけ研究者

• 2013.10

  -

  2019.03

  北海道大学, 電子科学研究所, 准教授

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Academic Background 【 Display / hide 】

Academic Background 【 Display / hide 】

• 1996.04

  -

  2000.03

  Keio University, 理工学部, 物理情報工学科

  University, Graduated

• 2000.04

  -

  2001.09

  Keio University, 理工学研究科, 基礎理工学専攻

  Graduate School, Completed, Master's course

• 2001.09

  -

  2004.09

  Keio University, 理工学研究科, 基礎理工学専攻

  Graduate School, Withdrawal after completion of doctoral course requirements, Doctoral course

Academic Degrees 【 Display / hide 】

Academic Degrees 【 Display / hide 】

• 博士（工学）, Keio University, Coursework, 2005.09

Research Areas 【 Display / hide 】

Research Areas 【 Display / hide 】

• Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment

• Nanotechnology/Materials / Nanostructural physics

• Nanotechnology/Materials / Applied physical properties

• Nanotechnology/Materials / Thin film/surface and interfacial physical properties

Research Keywords 【 Display / hide 】

Research Keywords 【 Display / hide 】

• 磁性

• 薄膜

• スピントロニクス

• ナノテクノロジー

• インピーダンス

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Books 【 Display / hide 】

Books 【 Display / hide 】

• トンネル磁気キャパシタンス効果の原理と新たな展開

  海住英生, 長浜太郎, 電気学会A部門誌特集号 Vol. 141, pp. 270-278, 2021.05

• 磁気トンネル接合における電圧誘起磁気キャパシタンス効果

  海住英生, まてりあ Vol. 59, pp. 191-198, 2020.04

• 固体電気化学を利用したイオン制御による物質合成

  藤岡正弥、海住英生、西井準治, 化学工業社, 2019

• 磁性薄膜エッジを利用した新規なナノスケール接合デバイスの創製

  海住英生, 藤岡正弥, 西井準治, 電気学会誌, 2019

  Scope: Vol. 139, pp. 730-735

• 磁気トンネル接合における室温巨大磁気キャパシタンス効果

  海住英生、長浜太郎、北上修、西井準治、Gang Xiao, 日本磁気学会研究会資料, 2019

  Scope: Vol. 224, pp. 7-13

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Papers 【 Display / hide 】

Papers 【 Display / hide 】

• Emergent magneto-inductance effect in NiFe thin films on glass substrates at room temperature

  Zijing Zhang, Yu Matsushima, Yuto Shibata, Tsunagu Hatakeyama, Mizuki Matsuzaka, Takumi Funato, Mamoru Matsuo, Hideo Kaiju

  Journal of Magnetism and Magnetic Materials (Elsevier BV)  610   172500(1) - 172500(7) 2024.09

  Last author, Corresponding author, Accepted,  ISSN  0304-8853

  • Access to Document (DOI)

• Emergent magneto-inductance effect in permalloy thin films on flexible polycarbonate substrates at room temperature

  Yu Matsushima, Zijing Zhang, Yuri Ohashi, Tsunagu Hatakeyama, Gang Xiao, Takumi Funato, Mamoru Matsuo, Hideo Kaiju

  Applied Physics Letters (AIP Publishing)  124 ( 2 ) 022404-1 - 022404-7 2024.01

  Last author, Corresponding author, Accepted,  ISSN  0003-6951

  　View Summary

  Emergent inductance has attracted significant interest for its relevance in both interesting fundamental physics and practical applications in magnetic devices that demand miniaturization without compromising inductance. In this Letter, we report the discovery of a stepwise magnetic field-induced emergent magneto-inductance (EML) effect in Permalloy (Py) thin films deposited on polycarbonate (PC) substrates. Remarkably, Py/PC devices exhibit an exceptionally large inductance variation exceeding 1 μH at room temperature, and intriguingly, a sign reversal of inductance occurs around the zero magnetic field. The dependencies of the EML effect on frequency, step magnetic field changes, and film width can be explained from the theory based on the spin motive force driven by transient domain wall motion. This study opens up exciting avenues for advancing our understanding of emergent inductance in fundamental physics and paves the way for practical applications in flexible magnetic devices.

  • Access to Document (DOI)

• Large magnetocapacitance of up to 456% at room temperature in FeCo/MgAl₂O₄/FeCo(001) magnetic tunnel junctions

  Yuto Shibata, Kenta Sato, Hiroaki Sukegawa, Hideo Kaiju

  Applied Physics Express (IOP Publishing)  16 ( 11 ) 113003 - 113003 2023.11

  Last author, Corresponding author, Accepted,  ISSN  1882-0778

  　View Summary

  Abstract
  
  Tunnel magnetocapacitance (TMC) ratios greater than 450% are observed at room temperature in epitaxial FeCo/MgAl₂O₄/FeCo(001) magnetic tunnel junctions (MTJs). A large TMC is observed at a low bias of 75 mV, which is suitable for low-power electronics. The fitting results between experimental data and calculation based on extended Debye–Fröhlich model reveal that the large TMC ratio is obtained owing to the high spin polarization of FeCo and the spin capacitance of the lattice-matched interface between FeCo and MgAl₂O₄. Based on this model, a TMC ratio could reach 1500% in MTJs with a spin polarization of 90%.

  • Access to Document (DOI)

• Site-Specific Synthesis of Conductive Graphitic Nanomaterials on a NiFe Thin Film by Localized Laser Irradiation

  Hideki Fujiwara, Seigo Daikokuya, Tatsuki Mirokuin, Kyohei Hayashi, Mizuki Matsuzaka, Yuri Ohashi, Christophe Pin, Hideo Kaiju, Kenji Hirai, Hiroshi Uji-i

  ACS Applied Nano Materials (American Chemical Society (ACS))  6 ( 15 ) 13885 - 13893 2023.07

  Accepted,  ISSN  2574-0970

  • Access to Document (DOI)

• Modulation of magnetic anisotropy by bending in Ni and Ni78Fe22 thin films on polycarbonate organic substrates

  Yuri Ohashi, Yu Matsushima, Hideo Kaiju

  Journal of Magnetism and Magnetic Materials (Elsevier BV)  570   170497-1 - 170497-5 2023.03

  Last author, Corresponding author, Accepted,  ISSN  0304-8853

  • Access to Document (DOI)

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Papers, etc., Registered in KOARA 【 Display / hide 】

Papers, etc., Registered in KOARA 【 Display / hide 】

• Creation of light-induced large magneto-dielectric devices using magnetic nanostructures

  Kaiju, Hideo

  科学研究費補助金研究成果報告書 2021

• Room-temperature large magnetocapacitance effect in magnetic tunnel junctions using high spin polarization materials

  Kaiju, Hideo

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2021

• Sign inversion phenomenon of tunnel magnetocapacitance using frequency modulation and voltage-induced effect

  Kaiju, Hideo

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2020

• Observation of voltage-induced large magnetocapacitance effect in magnetic tunnel junctions

  Kaijū, Hideo

  科学研究費補助金研究成果報告書 2020

• Observation of large magnetocapacitance effect in magnetic tunnel junctions

  Kaiju, Hideo

  学事振興資金研究成果実績報告書 (慶應義塾大学)  2019

Presentations 【 Display / hide 】

Presentations 【 Display / hide 】

• 直流・交流スピントロニクスが切り拓く革新的次世代デバイス

  海住英生

  第44回電子材料研究討論会, 

  2024.11

  , 

  Oral presentation (invited, special)

• Observation of spin signal in Ni78Fe22/Erq3/FeCo organic spin valves

  Ryunosuke Miyamoto, Mizuki Matsuzaka, Mari Taniguchi, Takumi Ueda, Chika Hashimoto, Kotaro Kashima, Kazuya Ando, Hideo Kaiju

  KiPAS international workshop on Recent Advances in Orbitronics and Spintronics, 

  2024.11

  , 

  Symposium, workshop panel (public)

• Observation of magnetoresistance effect in nano-devices using chiral molecules

  Mizuki Matsuzaka, Ryunosuke Miyamoto, Kotaro Kashima, Takumi Ueda, Koki Terai, Takashi Yamamoto, Kohei Sambe, Tomoyuki Akutagawa, Hideo Kaiju

  KiPAS international workshop on Recent Advances in Orbitronics and Spintronics, 

  2024.11

  , 

  Poster presentation

• Observation of high output voltage in oscillation controlled magnetic sensing using magnetic tunnel junctions

  Mizuki Wakamoto, Yuto Shibata, Mizuki Matsuzaka, Gang Xiao, Hideo Kaiju

  KiPAS international workshop on Recent Advances in Orbitronics and Spintronics, 

  2024.11

  , 

  Poster presentation

• CoFe2O4ナノキューブの磁気特性におよぼす二次元・三次元規則配列の影響

  小野太郎, 渡辺洋人, 田中遼, 高辻陽平, 緒明佑哉, 海住英生, 今井宏明

  第14回 CSJ化学フェスタ2024, 

  2024.10

  , 

  Oral presentation (general)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

Research Projects of Competitive Funds, etc. 【 Display / hide 】

• Creation of large emergent magneto-inductance devices using magnetic thin films

  2025.06

  -

  2027.03

  日本学術振興会, 科学研究補助金挑戦的研究（萌芽）, Research grant, Principal investigator

• ナノスケール磁性体のスピンダイナミクスに関する研究

  2025.04

  -

  2026.03

  物質・デバイス領域共同研究課題 展開共同研究, Other, Coinvestigator(s)

• 無機・有機ハイブリッド磁気ナノ構造を用いた巨大磁気キャパシタンス効果の発現

  2024.04

  -

  2027.03

  日本学術振興会, 科学研究補助金基盤研究(B), Research grant, Principal investigator

• 水熱合成法を利用したランダムレーザー光源の電気駆動化に関する研究

  2023.04

  -

  2026.03

  日本学術振興会, 科学研究補助金基盤研究(B), Research grant, Coinvestigator(s)

• 格子整合型磁気トンネル接合における超巨大磁気キャパシタンス効果

  2023.04

  -

  2024.03

  慶應義塾先端科学技術研究センター（KLL）, 2023年度指定研究プロジェクト 次世代先端分野探索研究（探索研究推進費）, Other, Principal investigator

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Courses Taught 【 Display / hide 】

Courses Taught 【 Display / hide 】

• PRESENTATION TECHNIQUE

  2025

• PHYSICS OF MAGNETISM

  2025

• NANO SCALE SCIENCE JOINT SEMINAR

  2025

• MATERIAL DESIGN SCIENCE JOINT SEMINAR

  2025

• INTRODUCTION TO FUNCTIONAL MATERIALS

  2025

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Memberships in Academic Societies 【 Display / hide 】

Memberships in Academic Societies 【 Display / hide 】

• 電気学会, 

  2016.08

  -

  Present

• 日本セラミックス協会, 

  2014.12

  -

  Present

• 応用物理学会, 

  2004.12

  -

  Present

• 日本磁気学会, 

  2001.04

  -

  Present

• 日本物理学会, 

  2000.01

  -

  Present

Committee Experiences 【 Display / hide 】

Committee Experiences 【 Display / hide 】

• 2024.03

  -

  Present

  スピントロニクス研究会幹事, 応用物理学会

• 2020.04

  -

  Present

  磁性材料の高周波特性活用技術調査専門委員会委員, 電気学会

• 2019.06

  -

  Present

  第1期マテリアルズ・インフォマティクス基礎研究会 委員, 日本材料科学会

• 2019.06

  -

  Present

  産学連携「分子系の複合電子機能第181委員会」 委員, 日本学術振興会

• 2018.12

  -

  2019.12

  実行委員, The 3rd Workshop on Functional Materials Science

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