Details of a Researcher

Kaiju, Hideo

写真a

Affiliation: Faculty of Science and Technology, Department of Applied Physics and Physico-Informatics 先端数物科学専攻 ( Yagami )

Position: Professor

E-mail Address

Related Websites

https://www.kaiju.appi.keio.ac.jp/

Telephone No.: +81-45-566-1428

Page Top ▲

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

display all >>

Page Top ▲

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

Page Top ▲

Academic Degrees 【 Display / hide 】

博士（工学）, Keio University, Coursework, 2005.09

Page Top ▲

Research Areas 【 Display / hide 】

Natural Science / Semiconductors, optical properties of condensed matter and atomic physics
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment
Nanotechnology/Materials / Composite materials and interfaces
Nanotechnology/Materials / Nanostructural physics

display all >>

Page Top ▲

Research Keywords 【 Display / hide 】

磁性
薄膜
Magnetism
Spintronics
Nanotechnology

display all >>

Page Top ▲

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
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

display all >>

Page Top ▲

Papers 【 Display / hide 】

Bending characteristics of anisotropic magnetoresistance effect in NiFeCu thin films on ultra-smooth polyimide substrates

Riko Iimori, Zijing Zhang, Tsunagu Hatakeyama, Mizuki Matsuzaka, Hideo Kaiju

Physica B: Condensed Matter (Elsevier BV) 737 418757-1 - 418757-9 2026.09

Last author, Corresponding author, Accepted, ISSN 0921-4526
- Access to Document (DOI)
Chirality-induced spin selectivity in organic spin valves utilizing 1,1′-Bi-2-naphthol with and without AlOx insulating layers

Kotaro Kashima, Mizuki Matsuzaka, Ryunosuke Miyamoto, Koki Terai, Takumi Ueda, Kazuto Yamanoi, Yukio Nozaki, Masayuki Suda, Hideo Kaiju

APL Materials (AIP Publishing) 14 ( 5 ) 051109-1 - 051109-9 2026.05

Last author, Corresponding author, Accepted

　View Summary

Recently, chirality-induced spin selectivity (CISS) has been observed in chiral molecules and has become attractive for applications in magnetoresistance (MR) devices. In this study, we fabricate CISS-based organic spin valves (OSVs) consisting of the chiral molecule 1,1′-Bi-2-naphthol (BINOL), sandwiched between an Au electrode and Co/Pt layers with perpendicular magnetic anisotropy, with and without an AlOx layer. We successfully fabricated Au/R-(+)-BINOL/Co/Pt/Co/Pt/Cr (Au/R-(+)-BINOL/[Co/Pt]2) and Au/S-(−)-BINOL/[Co/Pt]2 OSVs. These devices, which exhibit sharp interfaces, demonstrate clear CISS-based MR effects under a low magnetic field of ∼20 mT at room temperature. The MR curves of both Au/R-(+)-BINOL/[Co/Pt]2 and Au/S-(−)-BINOL/[Co/Pt]2 OSVs correspond well to the perpendicular magnetization curves of the [Co/Pt]2 electrodes. The polarity of the resistance change also exhibits opposite behaviors in the two devices. This indicates that an MR effect based on CISS is successfully observed in the Au/BINOL/[Co/Pt]2 OSVs. In addition, we fabricate Au/BINOL/AlOx/[Co/Pt]2 OSVs, in which an AlOx layer is inserted. We find that inserting an AlOx layer at the molecule/Co interface decreases both the MR and signal-to-noise (S/N) ratios of the MR curves compared with those of devices without an AlOx layer. The results of this study can contribute to elucidating the mechanism of CISS and provide new insights into its effect for spintronic device applications.
- Access to Document (DOI)
Magnetic Sensing via Oscillation Control in MgO-Based Magnetic Tunnel Junctions

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

IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers (IEEE)) 62 ( 1 ) 4000107-1 - 4000107-7 2026.01

Last author, Corresponding author, Accepted, ISSN 0018-9464
- Access to Document (DOI)
Observation of magnetoresistance effect in Ni78Fe22/tris-(8-hydroxyquinoline) erbium (Erq3)/FeCo organic spin valves

Mizuki Matsuzaka, Ryunosuke Miyamoto, Chika Hashimoto, Mari Taniguchi, Kotaro Kashima, Shun Dekura, Takumi Ueda, Yusuke Nomura, Tomoyuki Akutagawa, Kazuya Ando, Hideo Kaiju

Journal of Magnetism and Magnetic Materials (Elsevier BV) 630 173465 2025.10

Last author, Corresponding author, Accepted, ISSN 0304-8853
- Access to Document (DOI)
Large emergent magneto-inductance effect in NiFeCu thin films on flexible polyimide substrates at room temperature

Zijing Zhang, Tsunagu Hatakeyama, Mizuki Matsuzaka, Riko Iimori, Yu Matsushima, Takumi Funato, Mamoru Matsuo, and Hideo Kaiju

AIP Advances 15 085124 2025.08

Last author, Corresponding author, Accepted
- Access to Document (DOI)

display all >>

Page Top ▲

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

Observation of large tunnel magnetocapacitance effect and elucidation of its mechanism

Kaiju, Hideo

科学研究費補助金研究成果報告書 2023
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

display all >>

Page Top ▲

Presentations 【 Display / hide 】

Bending characteristics of anisotropic magnetoresistance effect in NiFeCu thin films on ultra-smooth polyimide substrates

Riko Iimori, Zijing Zhang, Tsunagu Hatakeyama, Mizuki Matsuzaka, Hideo Kaiju

Iwate Spintronics School, 2026 Winter,

2026.03
,
Poster presentation
DC/AC Spintronics

Hideo Kaiju

APPI GlobalSeminar,

2026.03
,
Oral presentation (keynote)
酸化鉄超微粒子の合成と分子修飾による凝集制御

大西啓太, 海住英生, 緒明佑哉, 今井宏明

日本磁気科学会第19回年次大会,

2025.11
,
Oral presentation (general)
Fabrication of Co electrodes for fullerene-based nanodevices and their structural and magnetic properties

Koki Terai, Mizuki Matsuzaka, Takumi Ueda, Hideo Kaiju

The 38th International Microprocesses and Nanotechnology Conference,

2025.11
,
Oral presentation (general)
Fabrication of molecular nanoscale thermoelectric devices and establishment of its evaluation method

Kosuke Furukawa, Mizuki Matsuzaka, Takumi Ueda, Ryota Uesugi, Takashi Komine, Hideo Kaiju

The 38th International Microprocesses and Nanotechnology Conference,

2025.11
,
Poster presentation

display all >>

Page Top ▲

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)
Observation of large magnetocapacitance effect in inorganic and organic hybrid magnetic nanostructures

2024.04

-

2027.03

Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Research grant, Principal investigator
Study on Electrically Driven Random Lasers Using Hydrothermal Synthesis Method

2023.04

-

2026.03

Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Research grant, Coinvestigator(s)

　View Summary

本課題では、ランダムレーザーの実用化に向けた課題の解消を目指し、水熱合成法を利用した電気駆動可能なランダムレーザー光源を簡単かつ確実に作製する方法を確立することを目的としている。初年度では、水熱合成法を用い、p型GaN基板上にZnO粒子膜を形成した後、透明電極としてFTO基板に粒子面を貼り合わせただけの簡単な構造の作製を行った。
実験では、前駆体溶液濃度を100mMとし、ヒーター温度、加熱時間を変えながらGaN基板上へのZnO粒子膜の合成を行った。試作した試料を超純水で洗浄・乾燥させた後、ZnO粒子膜に透明電極基板（FTO基板）を圧着し、固定した。その後、光学励起によるZnOの発光測定を行った結果、いずれの条件においても欠陥や不純物に由来した可視域の発光は見られず、380nm付近のバンドギャップに由来した紫外発光を確認し、品質の良いZnO粒子膜を合成できていることを確認した。また、GaNとFTO基板上に電極を取り付け、電流ー電圧測定を行ったところ、簡単な作製方法にも関わらず3.5V付近に立ち上がりを示す非線形な挙動を確認し、また、粒子膜上の幾つかのスポットにおいて青色の発光を確認した。印加電圧に応じて発光強度が変化する様子を確認できたことから、電気駆動発光を観測できる試料の試作に成功した。しかし、発光が微弱であることや粒子膜の導通する局所領域でのみ発光を示すことから、今後、電極基板の取り付け方法や電流値を増加させるような試料の作製方法を探って行く予定である。
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

display all >>

Page Top ▲

Awards 【 Display / hide 】

Poster Award

Mizuki Matsuzaka, Ryunosuke Miyamoto, Kotaro Kashima, Takumi Ueda, Takashi Yamamoto, Kohei Sambe, Tomoyuki Akutagawa, Hideo Kaiju, 2024.11, 第85回応用物理学会秋季学術講演会, Fabrication of nanoscale magnetoresistance devices using chiral molecules
Poster Award, Nominated

若本瑞葵, 柴田有仁, 松坂美月, Gang Xiao, 海住英生, 2024.09, 第85回応用物理学会秋季学術講演会, 磁気トンネル接合を用いた高出力電圧磁気センシング
Poster Award

Chika Hashimoto, Mizuki Matsuzaka, Hideo Kaiju, 2024.06, GCIM 2024 & IUMRS-ICYRAM 2024 & MRS-K SPRING MEETING, Fabrication and evaluation of molecular nanojunctions utilizing magnetic thin-film edges
Poster Award

Mizuki Matsuzaka, Yuma Sasaki, Kyohei Hayashi, Takahiro Misawa, Takashi Komine, Tomoyuki Akutagawa, Masaya Fujioka, Junji Nishii, Hideo Kaiju, 2022.12, 24. The 23rd RIES-HOKUDAI International Symposium, Observation of spin signal in molecular nanojunctions utilizing magnetic thin-film edges at room temperature
秋季学術講演会ポスターアワードノミネート

Kenta Sato, Hiroaki Sukegawa, Kentaro Ogata, Gang Xiao, Hideo Kaiju, 2022.09, 応用物理学会, Large magnetocapacitance beyond 420% in epitaxial magnetic tunnel junctions with an MgAl2O4 barrier