Hiroaki Sukegawa
Group Leader, Spintronics Group,
Research Center for Magnetic and Spintronic Materials
Email:SUKEGAWA.Hiroaki[at]nims.go.jp


EDUCATION
  • Dr. Eng. Materials Science, Tohoku Univeristy, 2007
  • M.S. Materials Science, Tohoku Univeristy, 2004
  • B.S. Materials Science, Tohoku University, 2002

    • PROFESSIONAL EXPERIENCE
  • 2018.4 - present: Principal researcher, National Institute for Materials Science
  • 2014.4 - 2018.3: Senior researcher, National Institute for Materials Science
  • 2007.4 - 2014.3: Researcher, National Institute for Materials Science
  • 2006.4－2007.3: Fellowships from Japan Society for Promotion of Science (DC2)

    • RESEARCH INTEREST
  • Spintronics
  • Microfabrication of Magnetic Thin Films
  • Magnetic tunnel junction
  • Co-based Heusler alloys
  • Spinel barrier

    • Recent Publications, Presentations and Patents
  • https://samurai.nims.go.jp/profiles/sukegawa_hiroaki/publications
  • Google Scholar

    • Selected Publications All publications (ResearchGate)
    1. Rombang Rizky Sihombing, Thomas Scheike, Jun Uzuhashi, Tadakatsu Ohkubo, Zhenchao Wen, Seiji Mitani, and Hiroaki Sukegawa (corresponding author),
      "Enhanced tunnel magnetoresistance of Fe/MgGa2O4/Fe(001) magnetic tunnel junctions by interface-tuning with atomic scale MgO insertion layers"
      Appl. Phys. Lett. 126, 022407-1~7 (2025).
      Selected as Editor's Pick
      Open access

    2. Explanation in Research page
      Jieyuan Song (corresponding author), Thomas Scheike, Cong He, Zhenchao Wen, Tadakatsu Ohkubo, Kwangseok Kim, Hiroaki Sukegawa (corresponding author), and Seiji Mitani,
      "Incommensurate superlattice modulation surviving down to an atomic scale in sputter-deposited Co/Pt(111) epitaxial multilayered films"
      APL Mater. 12, 101120-1~7 (2024).
      Open access

    3. Cong He, Keisuke Masuda, Jieyuan Song, Thomas Scheike, Zhenchao Wen; Yoshio Miura, Tadakatsu Ohkubo, Kazuhiro Hono, Seiji Mitani, and Hiroaki Sukegawa,
      "Nano-crystal domains in Co-based fcc(111) epitaxial magnetic junctions and their impact on tunnel magnetoresistance"
      Acta Mater. 261, 119394-1~14 (2023).

    4. Explanation in Research page
      Thomas Scheike, Zhenchao Wen, Hiroaki Sukegawa (corresponding author), and Seiji Mitani,
      "631% room temperature tunnel magnetoresistance with large oscillation effect in CoFe/MgO/CoFe(001) junctions"
      Appl. Phys. Lett. 122, 112404-1~6 (2023).
      Selected as Featured Article
       Open access

    5. Thomas Scheike, Zhenchao Wen, Hiroaki Sukegawa (corresponding author), and Seiji Mitani,
      "Enhanced tunnel magnetoresistance in Fe/Mg4Al-Ox/Fe(001) magnetic tunnel junctions"
      Appl. Phys. Lett. 120, 032404-1~4 (2022).
      Selected as Editor's Pick
       Open access

    6. Muftah Al-Mahdawi, Qingyi Xiang, Yoshio Miura, Mohamed Belmoubarik, Keisuke Masuda, Shinya Kasai, Hiroaki Sukegawa, and Seiji Mitani,
      "Quantum-well tunneling anisotropic magnetoresistance above room temperature"
      Phys. Rev. B 103, L180408-1~6 (2021).

    7. Thomas Scheike, Qingyi Xiang, Zhenchao Wen, Hiroaki Sukegawa (corresponding author), Tadakatsu Ohkubo, Kazuhiro Hono, and Seiji Mitani,
      "Exceeding 400% tunnel magnetoresistance at room temperature in epitaxial Fe/MgO/Fe(001) spin-valve-type magnetic tunnel junctions"
      Appl. Phys. Lett. 118, 042411-1~6 (2021).
      Selected as Featured Article
      Selected as Scilight

    8. Q. Y. Xiang, H. Sukegawa, M. Belmoubarik, M. Al-Mahdawi, T. Scheike, S. Kasai, Y. Miura, and S. Mitani,
      "Realizing Room-Temperature Resonant Tunnel Magnetoresistance in Cr/Fe/MgAl2O4 Quasi-Quantum Well Structures"
      Adv. Sci. 6, 1901438-1~7 (2019).

    9. Ikhtiar, Hiroaki Sukegawa (corresponding author), Xiandong Xu, Mohamed Belmoubarik, Hwachol Lee, Shinya Kasai, and Kazuhiro Hono,
      "Giant tunnel magnetoresistance in polycrystalline magnetic tunnel junctions with highly-textured MgAl2O4(001) based barriers"
      Appl. Phys. Lett. 112, 022408-1~5 (2018).
      Selected as Featured article

    10. Hiroaki Sukegawa, Yushi Kato, Mohamed Belmoubarik, P.-H. Cheng, Tadaomi Daibou, Naoharu Shimomura, Yuuzo Kamiguchi, Junichi Ito, Hiroaki Yoda, Tadakatsu Ohkubo, Seiji Mitani, and Kazuhiro Hono,
      "MgGa2O4 spinel barrier for magnetic tunnel junctions: Coherent tunneling and low barrier height"
      Appl. Phys. Lett. 110, 122404-1~5 (2017).
      Selected as AIP in the news

    11. Hiroaki Sukegawa, Jason Paul Hadorn, Zhenchao Wen, Tadakatsu Ohkubo, Seiji Mitani, and Kazuhiro Hono,
      "Perpendicular magnetic anisotropy at lattice-matched Co2FeAl/MgAl2O4(001) epitaxial interfaces"
      Appl. Phys. Lett. 110, 112403-1~4 (2017).

    12. Thomas Scheike, Hiroaki Sukegawa (corresponding author), Koichiro Inomata, Tadakatsu Ohkubo, Kazuhiro Hono, and Seiji Mitani,
      "Chemical ordering and large tunnel magnetoresistance in Co2FeAl/MgAl2O4/Co2FeAl(001) junctions"
      Appl. Phys. Express 9, 053004-1~4 (2016).
      Selected as Spotlights2016

    13. Mohamed Belmoubarik, Hiroaki Sukegawa (corresponding author), Tadakatsu Ohkubo, Seiji Mitani, and Kazuhiro Hono,
      "MgAl2O4(001) based magnetic tunnel junctions made by direct sputtering of a sintered spinel target"
      Appl. Phys. Lett. 108, 132404-1~5 (2016).
      Selected as APL Editor's pick

    14. Zhenchao Wen, Hiroaki Sukegawa, Takao Furubayashi, Jungwoo Koo, Koichiro Inomata, Seiji Mitani, Jason Paul Hadorn, Tadakatsu Ohkubo, and Kazuhiro Hono,
      "A 4-Fold-Symmetry Hexagonal Ruthenium for Magnetic Heterostructures Exhibiting Enhanced Perpendicular Magnetic Anisotropy and Tunnel Magnetoresistance"
      Adv. Mater. 26, 6483-6490 (2014).

    15. Hiroaki Sukegawa, Yoshio Miura, Shingo Muramoto, Seiji Mitani, Tomohiko Niizeki, Tadakatsu Ohkubo, Kazutaka Abe, Masafumi Shirai, Koichiro Inomata, and Kazuhiro Hono
      "Enhanced tunnel magnetoresistance in a spinel oxide barrier with cation site disorder",
      Phys. Rev. B 86, 184401-1~5 (2012).

    16. Hiroaki Sukegawa, Huixin Xiu, Tadakatsu Ohkubo, Takao Furubayashi, Tomohiko Niizeki, Wenhong Wang, Shinya Kasai, Seiji Mitani, Koichiro Inomata, and Kazuhiro Hono,
      "Tunnel Magnetoresistance with Improved Bias Voltage Dependence in Lattice-Matched Fe/Spinel MgAl2O4/Fe(001) Junctions"
      Appl. Phys. Lett. 96, 212505-1~3 (2010).

    17. R. Shan, H. Sukegawa, W. H. Wang, M. Kodzuka, T. Furubayashi, T. Ohkubo, S. Mitani, K. Inomata, and K. Hono,
      "Demonstration of Half-Metallicity in Fermi-Level-Tuned Heusler Alloy Co2FeAl0.5Si0.5 at Room Temperature"
      Phys. Rev. Lett. 102, 246601-1~4 (2009).

    18. H. Sukegawa, S. Nakamura, A. Hirohata, N. Tezuka and K. Inomata,
      "Significant Magnetoresistance Enhancement Due to a Cotunneling Process in a Double Tunnel Junction with Single Discontinuous Ferromagnetic Layer Insertion"
      Phys. Rev. Lett. 94, 068304-1~4 (2005).

    Review papers
    1. Kelvin Elphick, William Frost, Marjan Samiepour, Takahide Kubota, Koki Takanashi, Hiroki Sukegawa, Seiji Mitani, and Atsufumi Hirohata,
      "Heusler alloys for spintronic devices: review on recent development and future perspectives"
      2. Sci. Technol. Adv. Mater. 22, 235-271 (2021).
      STAM Altmetrics Award for 2021
      Open access

    2. M. Coll et al.,
      "Towards Oxide Electronics: a Roadmap"
      Appl. Surf. Sci. 482, 1~92 (2019).
      Open access

    3. Atsufumi Hirohata, Hiroki Sukegawa, Hideto Yanagihara, Igor Zutic, Takeshi Seki, Shigemi Mizukami, and Raja Swaminathan,
      "Roadmap for Emerging Materials for Spintronic Device Applications"
      IEEE Trans. Magn. 51, 0800511-1~11 (2015).
      Open access

    4. H. Sukegawa, Z. C. Wen, S. Kasai, K. Inomata, and S. Mitani,
      "Spin transfer torque switching and perpendicular magnetic anisotropy in full Heusler alloy Co2FeAl-based tunnel junctions"
      SPIN 4, 1440023-1~15 (2014).

    （date of update: Feb. 2025）

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