• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Theoretical design of artificial spintronic neurons

Research Project

Project/Area Number 19K05259
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Matsumoto Rie  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 主任研究員 (10635303)

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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsSpintronics / スピントロニクス
Outline of Research at the Start

脳内ニューロンのスパイク波形を再現するようなスピントロニクス・ニューロン素子を申請者らは既に提案していたが、単体素子を扱った研究にとどまっていた。人間の脳内では複数のニューロンが同期しながら情報処理を行っている。本プロジェクトでは複数のスピントロニクス・ニューロン素子が同期して情報処理を行うことが可能な、スピントロニクス・ニューロン・システムの理論提案を行う。

Outline of Final Research Achievements

For brain-like memory processing circuits, fast and low-power consumption non-volatile magnetic memories, MRAMs are expected to be applied. Memory elements of an MRAM are magnetic tunnel junctions (MTJs), and voltage-induced magnetization switching is expected as a low-power consumption writing technique for MTJs. Regarding voltage-induced magnetization switching, we conducted following theoretical studies: (1) We found optimal perpendicular anisotropy and magnetic field to stabilize the writing with keeping long tolerance of writing-voltage pulse duration. (2) We invented a lower-power consumption voltage-induced magnetization switching scheme. (3) We confirmed the stability of writing at room temperature in a magnetic-field free voltage-controlled MTJ.

Academic Significance and Societal Importance of the Research Achievements

書き込み電圧パルスの時間幅の許容範囲の長さと書き込みの安定化が両立により、電圧源からのパルス時間幅のばらつきや、MTJ素子間の最適パルス時間幅のばらつきが許容され、メモリの大容量化が可能となる。電圧書き込みの無磁界化により、磁界印加のためのコンポーネントをメモリに設けずに済み、その分メモリの集積度が向上する。低消費電力かつ大容量のMRAMを搭載した脳型記憶処理回路が実現されれば、エッジ端末での低消費電力かつリアルタイムでの情報処理が可能となる。

Report

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

    (8 results)

All 2022 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 3 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Write Error Rate in Bias-Magnetic-Field-Free Voltage-Induced Switching in a Conically Magnetized Free Layer2022

    • Author(s)
      R. Matsumoto and H. Imamura
    • Journal Title

      PHYSICAL REVIEW APPLIED

      Volume: 17 Issue: 3

    • DOI

      10.1103/physrevapplied.17.034063

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low-Power Switching of Magnetization Using Enhanced Magnetic Anisotropy with Application of a Short Voltage Pulse2020

    • Author(s)
      Matsumoto R.、Imamura H.
    • Journal Title

      Physical Review Applied

      Volume: 14 Issue: 2

    • DOI

      10.1103/physrevapplied.14.021003

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Chaos and Relaxation Oscillations in Spin-Torque Windmill Spiking Oscillators2019

    • Author(s)
      Matsumoto R.、Lequeux S.、Imamura H.、Grollier J.
    • Journal Title

      Physical Review Applied

      Volume: 11 Issue: 4

    • DOI

      10.1103/physrevapplied.11.044093

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Methods for reducing write error rate in voltage-induced switching having prolonged tolerance of voltage-pulse duration2019

    • Author(s)
      Matsumoto R.、Imamura H.
    • Journal Title

      AIP Advances

      Volume: 9 Issue: 12

    • DOI

      10.1063/1.5128154

    • Related Report
      2019 Research-status Report
  • [Presentation] 磁気異方性を増大させる短時間電圧パルスによる低消費電力磁化反転2020

    • Author(s)
      松本利映、今村裕志
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 垂直磁化型MRAMにおける電圧パルス時間幅の許容範囲が広い電圧書き込み方式2019

    • Author(s)
      松本利映、 佐藤智幸、今村裕志
    • Organizer
      第43回日本磁気学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Voltage-induced switching with long tolerance of voltage-pulse duration in a perpendicular MRAM2019

    • Author(s)
      R. Matsumoto、 T. Sato、 H. Imamura
    • Organizer
      The 64th Annual Conference on Magnetism and Magnetic Materials (2019 MMM)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 磁気素子、磁気メモリチップ、磁気記憶装置及び磁気素子の書き込み方法2019

    • Inventor(s)
      松本利映、野崎隆行、湯浅新治、今村裕志
    • Industrial Property Rights Holder
      松本利映、野崎隆行、湯浅新治、今村裕志
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-083195
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi