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Exploration of ultra-high speed spintronic devices using antiferromagnets

Research Project

Project/Area Number 19K21972
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionKyoto University

Principal Investigator

Takahiro Moriyama  京都大学, 化学研究所, 准教授 (50643326)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywordsスピントロニクス / 反強磁性体 / 反強磁性共鳴 / テラヘルツ / 反強磁性スピントロニクス / スピントルク
Outline of Research at the Start

本課題では、反強磁性体の超高速磁化反転およびその検出を行い、従来の強磁性体スピン素子ではこれまで成し得なかった超短時間領域の磁化反転ダイナミクスを理解し、さらにサブピコ秒超高速磁気メモリの動作実証を行うことを目的とする。本研究は反強磁性スピントロニクスを利用した、革新的超高速スピンデバイスの実証を目指す野心的・挑戦的なものである。本提案課題によって、反強磁性スピンデバイスの超高速動作が実証できれば、従来のスピントロニクス素子では成し得なかった時間領域(ピコ秒~サブピコ秒)の超高速性能を持つ革新的スピンデバイスへと展開できる。

Outline of Final Research Achievements

The purpose of this study is to understand the antiferromagnetic magnetization dynamics in the ultra-short time domain and to demonstrate the magnetization reversal device. First, we investigated the magnetization dynamics of antiferromagnetic materials such as NiO and α-Fe2O3, and found that the resonance frequency and damping constant, which are important for understanding the magnetization dynamics, can be controlled depending on the crystallinity and cation substitution elements. Second, we devised a photoconductive switch which generates and injects a picosecond current pulse into the antiferromagnetic element to reverse the magnetization. The magnetization reversal has not been clearly captured yet. Meanwhile, some issues have been identified regarding the optimization of the photoconductive switch and the current pulse introduction method. The research will be continued to achieve the goals.

Academic Significance and Societal Importance of the Research Achievements

本研究は、将来の超高速通信や超高速情報処理に供する革新的超高速スピンデバイスの実証を目指す挑戦的なものである。今回得られた反強磁性体の共鳴周波数や磁気ダンピング等の磁化ダイナミクス制御に関する知見は、超高速スピンデバイスを設計する上で重要な指針となる。超高速磁化反転を明瞭に捉えることはできなかったが、超高速スピンデバイスを実現する上で複数の具体的な問題点について洗い出すことができた。今後研究を継続することによって、反強磁性スピンデバイスの超高速動作が実証できれば、従来のスピントロニクス素子では成し得なかった時間領域(<ピコ秒)の超高速性能を持つ革新的スピンデバイスへと展開できる。

Report

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

    (15 results)

All 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results) Presentation (8 results) (of which Int'l Joint Research: 2 results,  Invited: 6 results)

  • [Int'l Joint Research] UCLA(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Radboud University(オランダ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] University of California, Los Angeles(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Laser stimulated THz emission from Pt/CoO/FeCoB2020

    • Author(s)
      Sasaki Yuta、Li Guanqiao、Moriyama Takahiro、Ono Teruo、Mikhaylovskiy Rostislav V.、Kimel Alexey V.、Mizukami Shigemi
    • Journal Title

      Applied Physics Letters

      Volume: 117 Issue: 19 Pages: 192403-192403

    • DOI

      10.1063/5.0020020

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tailoring THz antiferromagnetic resonance of NiO by cation substitution2020

    • Author(s)
      Takahiro Moriyama, Kensuke Hayashi, Keisuke Yamada, Mutsuhiro Shima, Yutaka Ohya, and Teruo Ono
    • Journal Title

      Physical Review Materials

      Volume: 4 Issue: 7 Pages: 074402-074402

    • DOI

      10.1103/physrevmaterials.4.074402

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhanced antiferromagnetic resonance linewidth in NiO/Pt and NiO/Pd2020

    • Author(s)
      Moriyama Takahiro、Hayashi Kensuke、Yamada Keisuke、Shima Mutsuhiro、Ohya Yutaka、Tserkovnyak Yaroslav、Ono Teruo
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 6 Pages: 060402-060402

    • DOI

      10.1103/physrevb.101.060402

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Intrinsic and extrinsic antiferromagnetic damping in NiO2019

    • Author(s)
      Moriyama Takahiro、Hayashi Kensuke、Yamada Keisuke、Shima Mutsuhiro、Ohya Yutaka、Ono Teruo
    • Journal Title

      Physical Review Materials

      Volume: 3 Issue: 5 Pages: 051402-051402

    • DOI

      10.1103/physrevmaterials.3.051402

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 反強磁性体テラヘルツスピントロニクスに向けて2021

    • Author(s)
      森山貴広
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] CONTROLLING ANTIFERROMAGNETIC RESONANCES2020

    • Author(s)
      森山貴広
    • Organizer
      第44回 日本磁気学会学術講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 反強磁性体磁化ダイナミクスのTHzスペクトロスコピー2020

    • Author(s)
      森山貴広
    • Organizer
      日本磁気学会 第229回研究会 「テラヘルツ領域におけるスピントロニクス研究の現状と展望」
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] α-Fe2-xMxO3 (M = Al, Ru, Rh, In)における反強磁性共鳴とモーリン温度の組成依存性2020

    • Author(s)
      林 兼輔、山田 啓介、嶋 睦宏、大矢 豊、小野 輝男、森山 貴広
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 傾斜組成Ni1-xMgxOにおけるTHz反強磁性共鳴制御2020

    • Author(s)
      上野 智貴、大野 悠太、林 兼輔、山田 啓介、嶋 睦宏、大矢 豊、小野 輝男、森山 貴広
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Spintronic operations with antiferromagnets2019

    • Author(s)
      Takahiro Moriyama
    • Organizer
      Material Research Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Spintronic operations with antiferromagnets2019

    • Author(s)
      Takahiro Moriyama
    • Organizer
      Magnonics 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 反強磁性体スピントロニクス2019

    • Author(s)
      森山貴広
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-07-04   Modified: 2022-01-27  

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