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Evaluation and control of magnetic properties at a nanomagnet surface in ultra-small spintronics devices

Research Project

Project/Area Number 19K04486
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionTohoku University

Principal Investigator

Jinnai Butsurin  東北大学, 材料科学高等研究所, 助教 (60807692)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsスピントロニクス / 微細加工 / 微細構造表面 / 磁気トンネル接合 / 微細構造
Outline of Research at the Start

極微細スピントロニクスデバイスでは、微細構造表面の寄与が大きくなるため、その表面磁気特性がデバイス特性を左右する。したがってその表面磁気特性を評価し制御することが、極微細スピントロニクスデバイスの高性能化にとって重要となる。本研究では、微細構造表面における磁気特性が実デバイスのデバイス特性や磁化反転機構にどのように影響するかを理解し、これらの知見をもとに極微細スピントロニクスデバイスの高性能化を実現するための微細化技術の設計指針を明らかにする。

Outline of Final Research Achievements

The relationship between nanofabrication process and passivation film materials and device characteristics has been revealed in the ultra-small MTJ devices with diameters of 10 nm or less. Passivation film materials for device performance improvement and film stack structures that can suppress the effects of the nanofabrication process have been shown. Furthermore, a design guideline for MTJ devices that can achieve high performance at the ultra-small scale beyond 10 nm in diameter has been established.

Academic Significance and Societal Importance of the Research Achievements

本研究で明らかにされた極微細領域でのMTJデバイス特性と微細加工プロセス・保護絶縁膜材料の関係や極微細MTJデバイス設計指針は、MTJデバイスの性能向上に大きく貢献できる。またMTJデバイス技術の応用発展に資するだけでなく、極微細領域のMTJデバイスで発現する物理現象のさらなる理解により、表面の物性に敏感な、マグノン、フォトン、またはフォノンなどが介在するスピントロニクス関連減少の学理の発展へと繋がっていくと期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2022 2021 2020 Other

All Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results) Presentation (13 results) (of which Int'l Joint Research: 9 results,  Invited: 5 results) Remarks (2 results)

  • [Journal Article] Nanosecond Random Telegraph Noise in In-Plane Magnetic Tunnel Junctions2021

    • Author(s)
      K. Hayakawa, S. Kanai, T. Funatsu, J. Igarashi, B. Jinnai, W. A. Borders, H. Ohno, and S. Fukami,
    • Journal Title

      Physical Review Letters

      Volume: 126 Issue: 11 Pages: 117202-117202

    • DOI

      10.1103/physrevlett.126.117202

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Coherent magnetization reversal of a cylindrical nanomagnet in shape-anisotropy magnetic tunnel junctions2021

    • Author(s)
      Jinnai Butsurin、Igarashi Junta、Watanabe Kyota、Enobio Eli Christopher I.、Fukami Shunsuke、Ohno Hideo
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 8 Pages: 082404-082404

    • DOI

      10.1063/5.0043058

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Temperature dependence of the energy barrier in X/1X nm shape-anisotropy magnetic tunnel junctions2021

    • Author(s)
      Igarashi Junta、Jinnai Butsurin、Desbuis Valentin、Mangin Stephane、Fukami Shunsuke、Ohno Hideo
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 1 Pages: 012409-012409

    • DOI

      10.1063/5.0029031

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Scaling magnetic tunnel junction down to single-digit nanometers - Challenges and prospects2020

    • Author(s)
      Butsurin Jinnai, Kyota Watanabe, Shunsuke Fukami, and Hideo Ohio
    • Journal Title

      Applied Physics Letters

      Volume: 116 Issue: 16 Pages: 160501-160501

    • DOI

      10.1063/5.0004434

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 大容量STT-MRAM向け一桁ナノメートル磁気トンネル接合技術2022

    • Author(s)
      陣内佛霖, 五十嵐純太, 篠田峻伸, 渡部杏太, 船津拓也, 佐藤英夫, 深見俊輔, 大野英男
    • Organizer
      シリコン材料・デバイス研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Fast Switching Down to 3.5 ns in Sub-5-nm Magnetic Tunnel Junctions Achieved by Engineering Relaxation Time2021

    • Author(s)
      Butsurin Jinnai, Junta Igarashi, Takanobu Shinoda, Kyota Watanabe, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      IEEE International Electron Devices Meeting (IEDM)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Crossover of magnetization reversal mode with thickness and diameter in shape-anisotropy magnetic tunnel junctions2021

    • Author(s)
      Junta Igarashi, Butsurin Jinnai, Kyota Watanabe, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      IEEE International Magnetics Conference (Intermag)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ultra-Small Shape-Anisotropy Magnetic Tunnel Junctions below 10 nm - Material, Device Engineering, and Performance2021

    • Author(s)
      Butsurin Jinnai, Junta Igarashi, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      IEEE International Magnetics Conference (Intermag)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ultra-small magnetic tunnel junction for fast STT switching2021

    • Author(s)
      Butsurin Jinnai, Junta Igarashi, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      Seminaire organise dans le cadre du projet IMPACT Nanomaterials for Sensors (N4S)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Shape-anisotropy magnetic tunnel junctions with multilayered ferromagnets2021

    • Author(s)
      Junta Igarashi, Butsurin Jinnai, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      Tohoku-Lorraine Joint Conference
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ultra-Small Shape-Anisotropy Magnetic Tunnel Junctions: Physics and Device Engineering2021

    • Author(s)
      Junta Igarashi, Butsurin Jinnai, Kyota Watanabe, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      The 4th International Symposium for The Core Research Cluster for Spintronics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Physics and stack engineering of ultra-small magnetic tunnel junctions using shape anisotropy2021

    • Author(s)
      Junta Igarashi, Butsurin Jinnai, Valentin Desbuis, Stephane Mangin, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] High-Performance Shape-Anisotropy Magnetic Tunnel Junctions down to 2.3 nm2020

    • Author(s)
      Butsurin Jinnai, Junta Igarashi, Kyota Watanabe, Takuya Funatsu, Hideo Sato, Shunsuke Fukami
    • Organizer
      IEEE International Electron Devices Meeting (IEDM)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Variation of energy barrier with temperature in 1X/X nm shape-anisotropy magnetic tunnel junctions2020

    • Author(s)
      Junta Igarashi, Butsurin Jinnai, Valentin Desbuis, Stephane Mangin, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      Magnetism and Magnetic Materials Conference (MMM)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Energy barrier of X/1X-nm shape-anisotropy magnetic tunnel junctions at high temperature2020

    • Author(s)
      Junta Igarashi, Butsurin Jinnai, Valentin Desbuis, Stephane Mangin, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Temperature dependence of thermal stability of 1X/X nm magnetic tunnel junctions with interfacial or shape anisotropy2020

    • Author(s)
      Junta Igarashi, Kyota Watanabe, Butsurin Jinnai, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      IEEE International Magnetics Conference (Intermag)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Thermal stability of 1X/X nm magnetic tunnel junctions with interfacial or shape anisotropy at high temperature2020

    • Author(s)
      Junta Igarashi, Kyota Watanabe, Butsurin Jinnai, Shunsuke Fukami, and Hideo Ohno
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Research-status Report
  • [Remarks] オングストローム世代半導体製造技術での磁気抵抗メモリ基盤技術を確立

    • URL

      https://www.tohoku.ac.jp/japanese/2021/12/press20211214-01-mtj.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] Magnetic Tunnel Junction for Angstrom Era

    • URL

      http://www.tohoku.ac.jp/en/press/magnetic_tunnel_junction_technology.html

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2025-03-27  

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