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

Creation of new magnetic wire memory with rare-earth and transition-metal ferri-magnetic magnetic wire that achieves both ultra-low power consumption and ultra-high speed

Research Project

Project/Area Number 20H02185
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionToyota Technological Institute

Principal Investigator

AWANO HIROYUKI  豊田工業大学, 工学(系)研究科(研究院), 教授 (40571675)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2021: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2020: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Keywords磁性細線メモリ / 超高速光磁気記録 / 高速データレート / 高速磁壁移動速度 / 希土類・遷移金属合金 / 短パルス電流高速磁壁駆動 / GdFeCo / 超低消費電力 / 磁性細線 / 電流磁壁駆動 / 電流磁壁移動速度 / 電流パルス幅 / 電流密度 / 角運動量補償組成 / 温度依存性 / 希土類/遷移金属合金・多層膜 / 低電流密度 / ナノインプリントスピンデバイス / 高速磁壁駆動 / g値 / レーストラックメモリ / 磁壁駆動速度
Outline of Research at the Start

IoT、ビッグデータ、人工知能による第4次産業革命(Society5.0)には安価で革新的な省電力高機能センサーやロジックインメモリが必要であり、この実現には希土類・遷移金属合金または多層膜と重金属層とのヘテロ結合したプラスチックナノインプリント磁性細線が有効である。プラスチックナノインプリント先行実験では磁壁駆動電流密度大幅低減が実現し、希土類・遷移金属/重金属ヘテロ構造では磁壁移動速度が2600m/secの高速を実現している。そこで、本研究ではこの省電力と高速磁壁駆動を両立させたスピンデバイスの材料や積層構造、メカニズムを明らかにし、安価、省電力、高機能な革新的スピンデバイス創成を目指す。

Outline of Final Research Achievements

In a ferrimagnetic nanowire memory made of a heavy rare earth/transition metal alloy, a data string recorded on the nanowire can be drived to an arbitrary location by applying a current to the nanowire. In order to use the real application as a low power consumption memory, it is necessary to drive the data string at high speed with little power. Therefore, we prepared a GdFeCo/Pt heterointerface magnetic nanowire and investigated a clever method to drive the recording magnetic domain on this nanowire at low current and high speed. As a result, we found that by narrowing the pulse width of the applied current to 3 nsec, the recorded magnetic domain pattern can be driven at a high speed of 2000m/sec with a small current. It was also shown that the domain wall motion velocity can be driven at a high speed of 1200m/sec or more from 0°C to 70°C.

Academic Significance and Societal Importance of the Research Achievements

磁性細線に電流を印加することで細線上に記録したデータ列を任意の場所に動かすことができる。このように磁性細線メモリでは、従来の磁気ディスクとは違って機械部分を持たない全固体磁気メモリとなる。したがって、モータの電力が不要となるため消費電力を1000分の1に低減することが期待できる。しかし、データ列の駆動電力低減とそのスピード高速化の両立が課題であった。そこで、重希土類・遷移金属合金からなるフェリ磁性細線メモリとすることで、高速磁壁駆動が可能な条件で磁壁駆動電力も低減できる両立条件を様々な条件で探索した。その結果、両立条件は磁壁駆動に必要なパルス電流のパルス幅を短くすることであることを見出した。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (25 results)

All 2023 2022 2021 2020

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (16 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Enhancement of permittivity off-diagonal terms in rare earth transition metal / heavy metal hetero-structured films2022

    • Author(s)
      Matsumoto Kei、Thach Pham Van、Sumi Satoshi、Ranjbar Sina、Tanabe Kenji、Awano Hiroyuki、Wang Shihao、Ishibashi Takayuki、Saito Shin
    • Journal Title

      Frontiers in Physics

      Volume: 10 Pages: 949571-949571

    • DOI

      10.3389/fphy.2022.949571

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of multi-bit domain wall motion by low current density to obtain ultrafast data rate in a compensated ferrimagnetic wire2022

    • Author(s)
      S. Ranjbar, S. Sumi, K. Tanabe, and H. Awano
    • Journal Title

      APL Materials

      Volume: 10 Issue: 9 Pages: 091102-091102

    • DOI

      10.1063/5.0086380

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elucidation of the mechanism for maintaining ultrafast domain wall mobility over a wide temperature range2022

    • Author(s)
      Ranjbar S.、Kambe S.、Sumi S.、Thach P. V.、Nakatani Y.、Tanabe K.、Awano H.
    • Journal Title

      Materials Advances

      Volume: 3 Issue: 18 Pages: 7028-7036

    • DOI

      10.1039/d2ma00273f

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ultra-thin interfacial domain wall less than 1 nm based on TbxCo100-x/Cu/[Co/Pt]2 heterostructures for multi-level magnetic pillar memory2021

    • Author(s)
      S. Ranjbar, S. Sumi, K. Tanabe, and H. Awano
    • Journal Title

      AIP Advances

      Volume: 11 Issue: 19 Pages: 115017-115017

    • DOI

      10.1063/5.0072336

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Large Perpendicular Exchange Energy in TbxCo100-x/Cu (t)/[Co/Pt]2 heterostructures2021

    • Author(s)
      S. Ranjbar, S. Sumi, K. Tanabe, and H. Awano
    • Journal Title

      Magnetochemistry

      Volume: 7 Issue: 11 Pages: 110141-110141

    • DOI

      10.3390/magnetochemistry7110141

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetization-dependent inverse spin Hall effect in compensated ferrimagnet TbCo alloys2021

    • Author(s)
      A. Yagmur, S. Sumi, H. Awano, and K. Tanabe
    • Journal Title

      Phys.Rev. B

      Volume: 103 Issue: 21 Pages: 214408-214408

    • DOI

      10.1103/physrevb.103.214408

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Laser induced spin injection to [GeTe/Sb2Te3] superlattice through a TbFeCo film2021

    • Author(s)
      S. Sumi, H. Awano, and J. Tominaga
    • Journal Title

      AIP Advances

      Volume: 12 Issue: 3 Pages: 035328-035328

    • DOI

      10.1063/9.0000300

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ferromagnetic Resonance of a [GeTe/Sb2Te3]6/Py Superlattice2021

    • Author(s)
      S. Sumi, Y. Hirano, H. Awano, and J. Tominaga
    • Journal Title

      Magnetochemistry

      Volume: 7 Issue: 12 Pages: 156-156

    • DOI

      10.3390/magnetochemistry7120156

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Strain-induced mudulation of temperature characteristics in ferrimagnetic Tb-Fe films2021

    • Author(s)
      S. Ota. P. V. Thach, H. Awano, A. Ando, K. Toyoki, Y. Kotani, T. Nakamura, T. Koyama, D. Chiba
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 6237-6237

    • DOI

      10.1038/s41598-021-85642-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 磁性細線における電流駆動磁壁移動のレーザ光検出2023

    • Author(s)
      鷲見聡、鈴木紀行、田辺賢士、粟野博之
    • Organizer
      応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Current induced magnetization switching with a laser assist2022

    • Author(s)
      S. Sumi, S. Ranjbar, K. Tanabe, H. Awano
    • Organizer
      MORIS (Magnetics and Optics Research International Symposium)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fast current induced domain wall motion in compensated GdFeCo nanowaire2022

    • Author(s)
      S. Ranjbar, S. Sumi, K.Tanabe, H. Awano
    • Organizer
      MORIS (Magnetics and Optics Research International Symposium)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of magnetic flux density distribution of magnetic domains recorded in racetrack memory by TMR head2022

    • Author(s)
      23)Sota Kambe, Hiroyuki Awano, Sina Ranjbar, Satoshi Sumi, Kenji Tanabe
    • Organizer
      MMM2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Laser assisted current induced magnetization switching in a TbCo/Pt hetero-structure wire2022

    • Author(s)
      Satoshi Sumi, Hiroyuki Awano, Sina Ranjbar, Kenji Tanabe,
    • Organizer
      MMM2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin motive force due to domain wall motion in GdFeCo magnetic wires2022

    • Author(s)
      M. Oikawa, S. Sumi, K. Tanabe, H. Awano
    • Organizer
      2022 Joint MMM-INTERMAG
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of pulse width and Joule heating on current-induced domain wall motion2022

    • Author(s)
      S. Kambe, S. Ranjbar, S. Sumi, K. Tanabe, H. Awano
    • Organizer
      2022 Joint MMM-INTERMAG
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Laser induced spin injection to [GeTe / Sb2Te3] supperlattice through a TbFeCo film2022

    • Author(s)
      S. Sumi, H. Awano, J. Tominaga,
    • Organizer
      2022 Joint MMM-INTERMAG
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TbCo/重金属ヘテロ界面のホール効果2022

    • Author(s)
      鷲見聡、Armet Yagmur, 田辺賢士、粟野博之
    • Organizer
      第60回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] レーザー掃引フラット磁性細線における磁壁駆動2021

    • Author(s)
      明瀬大和、粟野博之、田辺賢士、鷲見聡
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 光磁気記録におけるDMIの影響2021

    • Author(s)
      和井内琴理、松本憩、A. Yagmur, S. Ranjbar, 鷲見聡、田辺賢士、粟野博之
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] TbCo合金とTb/Co多層膜における異常ネルンスト効果の比較2021

    • Author(s)
      久田真人、A. Yagmur, 鷲見聡、田辺賢士、粟野博之
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ランドグルーブ基板における異方的異常ネルンスト効果2021

    • Author(s)
      坂本美雨、鷲見聡、久田真人,S. Ranjbar, A. Yagmur, 田辺賢士、粟野博之
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 磁気工学スペクトルを用いた磁性層/重金属層ヘテロ構造におけるスピン軌道相互作用由来の界面効果の検出2020

    • Author(s)
      松本憩、 鷲見聡、 田辺賢士、 粟野博之
    • Organizer
      IEEE Magnetics Society Nagoya Chapter 若手研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Detection of Interfacial Effects in Rare Earth Metal Doped Ferrimagnet Layer / Heavy Metal Layer Using Magneto-Optical Kerr Effect2020

    • Author(s)
      K. Matsumoto、 S.Sumi、 Kenji Tanabe、 Hiroyuki Awano
    • Organizer
      The 65th Annual Conference on Magnetism and Magnetic Materials
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 磁性層/重金属層界面における磁気光学Kerr効果の材料依存性2020

    • Author(s)
      松本憩、 P. N. Thach、 鷲見聡、 田辺賢士、 粟野博之、 王世浩、 石橋隆幸、 斎藤伸
    • Organizer
      第61回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi