Details of the Researcher

PHOTO

Masamichi Negishi
Section
Graduate School of Science
Job title
Assistant Professor
Degree

  • Ph.D. (Science) (The University of Tokyo)

e-Rad No.
70911147

Research History 3

  • 2023/06 - Present
    Tohoku University　Graduate School of Science Department of Chemistry　Assistant professor

  • 2021/04 - 2023/05
    Tohoku University　Institute for Materials Research Low Temperature Physics　Specially Appointed Assistant Professor (Research)

  • 2018/04 - 2021/03
    Japan Society for the Promotion of Science　Research Fellowships for Young Scientists

Education 3

  • The University of Tokyo　Graduate School of Science　Department of Physics

    2016/04 - 2021/03

  • The University of Tokyo　Faculty of Science　Department of Physics

    2014/04 - 2016/03

  • The University of Tokyo　College of Arts and Sciences

    2012/04 - 2014/03

Professional Memberships 2

  • The Japan Society of Applied Physics

  • The Physical Society of Japan

Research Areas 3

  • Nanotechnology/Materials / Thin-film surfaces and interfaces /

  • Nanotechnology/Materials / Inorganic materials /

  • Natural sciences / Magnetism, superconductivity, and strongly correlated systems /

Papers 11

  1. Fully Suppressed Superconductivity in Nonferromagnetic Heavy Fermion/Superconductor Bilayers: Rocksalt-Type CeO/LaO

    Mikito Sekine, Masamichi Negishi, Satoshi Sasaki, Hidetatsu Yoshimura, Noriaki Kimura, Tomoteru Fukumura

    ACS Nano　2026/07/21

    DOI： 10.1021/acsnano.6c00792 　

  2. Room Temperature Ferromagnetic GdO Epitaxial Thin Film without the Gd2O3 Impurity Phase: Metallic Electronic States and Thickness Dependence of Magnetic and Electrical Properties

    Satoshi Sasaki, Masamichi Negishi, Daisuke Shiga, Hiroshi Kumigashira, Tomoteru Fukumura

    ACS Applied Electronic Materials　2026/06/22

    DOI： 10.1021/acsaelm.6c00672 　

  3. Mott insulating state of IrO6 honeycomb monolayer structured in ilmenite-type oxide superlattice Peer-reviewed

    Masamichi Negishi, Kohei Fujiwara, Seong-Hoon Jang, Yi-Feng Zhao, Shun Sasano, Ryo Ishikawa, Naoya Shibata, Daisuke Shiga, Hiroshi Kumigashira, Yuto Nakamura, Hideo Kishida, Yukitoshi Motome, Atsushi Tsukazaki

    Physical Review Materials　9　086202　2025/08/12

    DOI： 10.1103/gz4v-8mds 　

  4. Rocksalt rare earth monoxides as electronic and magnetic materials Peer-reviewed

    Tomoteru Fukumura, Satoshi Sasaki, Masamichi Negishi, Daichi Oka

    Trends in Chemistry　7　(7)　384-396　2025/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.trechm.2025.04.011 　

    ISSN： 2589-5974

  5. Millimeter-Sized Single-Crystalline Anatase Nb-Doped TiO2 Membranes Exhibiting High Electrical Conduction and Transparency Peer-reviewed

    Yuzuki Uchida, Jiyang Huang, Masamichi Negishi, Seung Sae Hong, Tomoteru Fukumura

    ACS Applied Electronic Materials　7　(8)　3308-3313　2025/04/22

    DOI： 10.1021/acsaelm.4c02342 　

  6. Thin film epitaxy of high quality ferromagnetic semiconductor EuO using pulsed laser deposition equipped with Nd:YAG laser Peer-reviewed

    Ramchandra Sahoo, Yusuke Sato, Satoshi Sasaki, Masamichi Negishi, Ryota Takahashi, Tomoteru Fukumura

    Chemistry Letters　54　(2)　upaf005　2025/02/05

    DOI： 10.1093/chemle/upaf005 　

  7. Metallic conduction in high Curie temperature ferromagnetic heavy rare earth monoxides REO (RE = Tb, Dy, Er): rare-earth-dependent carrier polarity and anomalous Hall effect Peer-reviewed

    Satoshi Sasaki, Daichi Oka, Masamichi Negishi, Tomoteru Fukumura

    Journal of Materials Chemistry C　13　20728-20734　2025

    DOI： 10.1039/D5TC02202A 　

  8. Composition tuning of Mg/Ir ratio and crystallization of a spinel-related structure in Mg-Ir-O films by pulsed-laser deposition Peer-reviewed

    Masamichi Negishi, Kohei Fujiwara, Atsushi Tsukazaki

    Thin Solid Films　769　139740-139740　2023/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.tsf.2023.139740 　

    ISSN： 0040-6090

  9. A transparent room-temperature ferromagnetic semiconductor on glass: anatase Co-doped TiO2 oriented thin films with improved electrical conduction Peer-reviewed

    Jiyang Huang, Daichi Oka, Yasushi Hirose, Masamichi Negishi, Tomoteru Fukumura

    CrystEngComm　25　(34)　4907-4913　2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d3ce00364g 　

    eISSN： 1466-8033

    More details Close

    (101)-Oriented anatase Ti0.95Co0.05O2−δ thin films were grown on rigid and flexible glass substrates by using TiO2 seed layers. The thin films exhibited ferromagnetic semiconducting properties comparable to those of epitaxial thin films.

  10. Formation of ilmenite-type single-crystalline MgTiO3 thin films by pulsed-laser deposition Peer-reviewed

    Masamichi Negishi, Kohei Fujiwara, Atsushi Tsukazaki

    AIP Advances　11　(12)　125125-125125　2021/12/01

    Publisher: AIP Publishing

    DOI： 10.1063/5.0078021 　

    eISSN： 2158-3226

  11. Contrasted Sn substitution effects on Dirac line node semimetals SrIrO3 and CaIrO3 Peer-reviewed

    Masamichi Negishi, Naoka Hiraoka, Daisuke Nishio-Hamane, Hidenori Takagi

    APL Materials　7　(12)　121101-121101　2019/12/01

    DOI： 10.1063/1.5129235 　

    ISSN： 2166-532X

Show all ︎Show first 5

Presentations 26

  1. 透明導電性アナターゼ型NbドープTiO2単結晶メンブレンのひび割れの抑制による高い電気伝導性の実現

    内田 悠月, Huang Jiyang, 根岸 真通, Hong Seung Sae, 福村 知昭

    第15回CSJ化学フェスタ2025　2025/10/24

  2. Y/Te多層膜前駆体のその場熱処理によるYTe3薄膜の合成

    木村 史希, 根岸 真通, 河底 秀幸, 福村 知昭

    第86回応用物理学会秋季学術講演会　2025/09/09

  3. 透明導電性アナターゼ型NbドープTiO2単結晶メンブレンの作製

    内田 悠月, Huang Jiyang, 根岸 真通, Hong Seung Sae, 福村 知昭

    第72回応用物理学会春季学術講演会　2006/03/17

  4. Thin film growth and properties of novel rare-earth monoxide TmO

    Hidetatsu Yoshimura, Daichi Oka, Masamichi Negishi, Daisuke Shiga, Sasaki Satoshi, Hiroshi Kumigashira, Tomoteru Fukumura

    The 8th Symposium for the Core Research Clusters for Materials Science and Spintronics and the 7th Symposium on International Joint Graduate Program in Materials Science and Spintronics (CRCGP-MSSP2024)　2024/11/19

  5. エピタキシャル成長による結晶構造制御と磁性酸化物薄膜の創製

    根岸 真通

    第41回無機・分析化学コロキウム　2024/05/25

  6. 新希土類単酸化物TmOの薄膜合成と物性

    吉村 英竜, 岡 大地, 根岸 真通, 佐々木 智視, 福村 知昭

    第71回応用物理学会春季学術講演会　2024/03/24

  7. 単相の重希土類単酸化物エピタキシャル薄膜の電子輸送特性

    佐々木 智視, 岡 大地, 根岸 真通, 福村 知昭

    第71回応用物理学会春季学術講演会　2024/03/24

  8. Composition tuning via laser fluence and formation of a new spinel-type crystalline phase in pulsed-laser deposition of Mg-Ir-O films

    Masamichi Negishi, Kohei Fujiwara, Atsushi Tsukazaki

    The 70th JSAP Spring Meeting 2023　2023/03/17

  9. Synthesis of Ilmenite-type MgTiO3 Thin Films by Pulsed-Laser Deposition

    Masamichi Negishi, Kohei Fujiwara, Atsushi Tsukazaki

    The 69th JSAP Spring Meeting 2022　2022/03/23

  10. Pulsed-laser deposition of single-crystalline ilmenite MgTiO3 thin films

    M. Negishi, K. Fujiwara, A. Tsukazaki

    Summit of Materials Science 2022 & GIMRT User Meeting 2022　2022/03/03

  11. Approach to Kitaev Magnetism in Ilmenite-Based Superlattices using Spin Hall Magnetoresistance

    Masamichi Negishi, Kei Miura, Kohei Fujiwara, Kei Nakayama, Ryo Ishikawa, Naoya Shibata, Atsushi Tsukazaki

    The 5th Symposium for The Core Research Clustures for Materials Science and Spintronics, and the 4th Symposium on International Joint Graduate Program in Materials Science　2021/10/27

  12. Contrasting effects on Sn doping in correlated Dirac node semimetals SrIrO3 and CaIrO3

    M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi

    2019/11/27

  13. 層状ハニカム型イリジウム酸化物のエピタキシャル薄膜合成

    根岸真通, 北川健太郎, 高木英典

    日本物理学会第74 回年次大会　2019/03/15

  14. ペロブスカイト型イリジウム酸化物薄膜におけるディラックノード電子の相制御

    根岸真通, 平岡奈緒香, 浜根大輔, 大隅寛幸, 高木英典

    第10回低温センター研究交流会　2019/02/22

  15. Phase control of Dirac node electrons in perovskite-type (Sr, Ca)IrO3 thin film

    M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi

    The 19th Japan-Korea-Taiwan Symposium on Strongly Correlated Electron Systems (JKT19)　2019/01/12

  16. Phase control of Dirac node electrons in perovskite-type (Sr, Ca)IrO3 thin films

    M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi

    2018 Workshop of Max Planck-UBC-UTokyo Centre for Quantum Materials, University of Tokyo (Tokyo, Japan)　2018/12/10

  17. ステップ基板を用いたペロブスカイト型Sr(Ir1-x, Snx)O3薄膜の配向制御と電気輸送特性

    根岸真通, 平岡奈緒香, 北川健太郎, 高木英典

    日本物理学会2018年秋季大会　2018/09/09

  18. ペロブスカイト型SrIr1-xSnxO3薄膜の電子状態と弱強磁性

    根岸真通, 平岡奈緒香, 高木英典

    日本物理学会第73回年次大会　2018/03/23

  19. Phase control of Dirac node electrons in perovskite-type (Sr, Ca)IrO3 thin films

    M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi

    The 18th Taiwan-Japan-Korea Symposium on Strongly Correlated Electron Systems (TJK18)　2018/02/23

  20. Phase control of Dirac node electrons in perovskite-type (Sr, Ca)IrO3 thin films

    M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi

    Max Planck-UBC-UTokyo School - Elementary Excitation in Quantum Materials -　2018/02/17

  21. ペロブスカイト型AIr1-xSnxO3薄膜(A = Ca, Sr)の半金属磁性絶縁体相転移

    根岸真通, 平岡奈緒香, 大隅寛幸, 高木英典

    日本物理学会2017年秋季大会　2017/09/23

  22. ペロブスカイト型CaIr1-xSnxO3薄膜の輸送特性

    根岸真通, 平岡奈緒香, 高木英典, 浜根大輔

    日本物理学会第72回年次大会　2017/03/17

  23. Dirac Semimetal-Magnetic Insulator Transition in Perovskite AIr1-xSnxO3 Thin Films (A = Ca, Sr)

    M. Negishi, N. Hiraoka, D. Nishio-Hamane, H. Ohsumi, H. Takagi

    Yamada Science Foundation Junjiro Kanamori Memorial International Symposium - New Horizon of Magnetism -　2017/02/17

  24. Semimetal-magnetic insulator transition and magnetoresistance in perovskite SrIr1-xSnxO3 thin films

    M. Negishi, N. Hiraoka, H. Takagi

    Topo Mat Meeting　2016/09/19

  25. ペロブスカイト型SrIr1-xSnxO3薄膜の半金属磁性絶縁体転移と磁気抵抗

    根岸真通, 太田奈緒香, 北川健太郎, 高木英典

    日本物理学会2016年秋季大会　2016/09/13

  26. 6H-SrIrO3薄膜の輸送特性

    根岸真通, 松井直樹, 北川健太郎, 高木英典

    日本物理学会2015年秋季大会　2015/09

Show all Show first 5

Research Projects 5

  1. Development of 3d transition metal-titanium group metal composite oxides by epitaxial thin film growth

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Early-Career Scientists

    Institution: Tohoku University

    2025/04/01 - 2030/03/31

  2. Research and control of various magnetic orders in ilmenite-type titanate artificial superlattices

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Early-Career Scientists

    Institution: Tohoku University

    2022/04/01 - 2024/03/31

  3. Development of evaluation method for thin film magnetism by spin Hall magnetoresistance

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up

    Category: Grant-in-Aid for Research Activity Start-up

    Institution: Tohoku University

    2021/08/30 - 2023/03/31

  4. Realization and Control of Novel Quantum Spin Liquid in Epitaxial Thin Films

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows

    Category: Grant-in-Aid for JSPS Fellows

    Institution: The University of Tokyo

    2018/04/25 - 2021/03/31

  5. Fabrication of magnetic clusters on molecules and evaluation of their magnetic state

    Hiraoka Naoka, YAMADA TOYOKAZU, NEGISHI MASAMICHI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Research Activity Start-up

    Institution: The University of Tokyo

    2015/08 - 2017/03

    More details Close

    We purposed to create self-decoupled nanostructures consist of magnetic atoms with well-defined configuration, and elucidate their magnetic state. Scanning tunneling microscopy or pulsed laser deposition method was used to create well defined structures. Using the latter method, we obtained epitaxial thin films of perovskite type AIr1-xSnxO3, the electronic structure of which is expected to be characterized by the symmetry of the crystal. We revealed that the thin films show phase transition from paramagnetic semimetal to weak ferromagnetic insulator as a function of the substitution ratio and temperature. We also found anisotropic response of the systems to external magnetic field, e.g. in magnetization and magnetoresistance. The direction of the crystal growth and the anisotropy was correlated, which indicates controllability of the electromagnetic response of the film by tuning the structure.