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Fabrication of antiferromagnetic structures for low energy and high speed magnetization switching technique

Research Project

Project/Area Number 16H04487
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals/Metal-base materials
Research InstitutionTohoku University

Principal Investigator

SEKI Takeshi  東北大学, 金属材料研究所, 准教授 (40579611)

Co-Investigator(Kenkyū-buntansha) 窪田 崇秀  東北大学, 金属材料研究所, 助教 (00580341)
今村 裕志  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, 研究チーム長 (30323091)
森山 貴広  京都大学, 化学研究所, 准教授 (50643326)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
Keywords反強磁性体 / 積層構造 / ダイナミクス / スピントロニクス / 磁性材料 / 磁化ダイナミクス / ナノ構造 / 積層制御 / スピンエレクトロニクス
Outline of Final Research Achievements

The purposes of this research project are the materials development for fast magnetization reversal with low power consumption and the elucidation of its physical mechanism by exploiting the layered structure with an antiferromagnetic structure and its magnetization dynamics. We have fabricated the artificially controlled antiferromagnetic layered structure, and have observed its antiferromagnetic dynamics. We have systematically investigated the effect of spin orbit torque acting on the artificial antiferromagnetic structure, and finally the spin orbit torque switching has been demonstrated for the artificial antiferromagnetic structure. In addition, we have achieved the low-energy resonant magnetization switching by exciting the magnetization dynamics.

Academic Significance and Societal Importance of the Research Achievements

本研究課題によって得られた研究成果は、人工反強磁性体を創製するための指針や磁気構造および磁化ダイナミクスに関する知見、さらには反強磁性構造に作用するスピン軌道トルクの機構解明など、材料科学および物理学の観点から極めて重要な進展をもたらしたものであり、学術的に意義深い。また、外部擾乱に対して安定な磁気構造の反強磁性体をスピン軌道トルクで磁化制御した成果は、従来材料や技術では到達できない新しい切り口でのスピントロニクスデバイスの高性能化に繋がる技術と期待でき、社会的意義も大きいものと考えられる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (33 results)

All 2019 2018 2017 2016 Other

All Journal Article (8 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 8 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (23 results) (of which Int'l Joint Research: 10 results,  Invited: 9 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Anomalous Hall Effect and Anisotropic Magnetoresistance in Perpendicularly Magnetized FePt<sub>1-<i>x</i></sub>Pd<sub><i>x</i></sub> Films2019

    • Author(s)
      T. Seki, S. Kikushima, K. Takanashi
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: 43 Issue: 2 Pages: 29-33

    • DOI

      10.3379/msjmag.1903R004

    • NAID

      130007606300

    • ISSN
      1882-2924, 1882-2932
    • Year and Date
      2019-03-01
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Anomalous Ettingshausen effect in ferrimagnetic Co-Gd2019

    • Author(s)
      T. Seki, A. Miura, K. Uchida, T. Kubota, K. Takanashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 2 Pages: 023006-023006

    • DOI

      10.7567/1882-0786/aafb5a

    • NAID

      210000135583

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin-Hall and anisotropic magnetoresistance in ferrimagnetic Co-Gd/Pt layers2018

    • Author(s)
      W. Zhou,T. Seki, T. Kubota, G. E. W. Bauer, K. Takanashi
    • Journal Title

      Physical Review Materials

      Volume: 2 Issue: 9 Pages: 094404-094404

    • DOI

      10.1103/physrevmaterials.2.094404

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spin-Orbit-Torque Memory Operation of Synthetic Antiferromagnets2018

    • Author(s)
      Moriyama Takahiro、Zhou Weinan、Seki Takeshi、Takanashi Koki、Ono Teruo
    • Journal Title

      Physical Review Letters

      Volume: 121 Issue: 16 Pages: 167202-167202

    • DOI

      10.1103/physrevlett.121.167202

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Size dependence of vortex-type spin torque oscillation in a Co2Fe0.4Mn0.6Si Heusler alloy disk2018

    • Author(s)
      T. Seki, T. Kubota, T. Yamamoto, and K. Takanashi
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 51 Issue: 7 Pages: 075005-075005

    • DOI

      10.1088/1361-6463/aaa748

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Control of Magnetization Dynamics in Ordered Alloy Systems2017

    • Author(s)
      T. Seki, W. Zhou, T. Yamamoto, and K. Takanashi
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: 41 Issue: 3 Pages: 46-51

    • DOI

      10.3379/msjmag.1704R001

    • NAID

      130005632177

    • ISSN
      1882-2924, 1882-2932
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Magnetization switching behavior of exchange-coupled bilayer nanodots characterized by magneto-optical Kerr effect2017

    • Author(s)
      W. Zhou, T. Seki, and K. Takanashi
    • Journal Title

      Journal of Applied Physics

      Volume: 122 Issue: 9

    • DOI

      10.1063/1.4985848

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Resonant magnetization switching conditions of an exchange-coupled bilayer under spin wave excitation2017

    • Author(s)
      W. Zhou, T. Yamaji, T. Seki, H. Imamura, K. Takanashi
    • Journal Title

      Applied Physics Letters

      Volume: 110 Issue: 8

    • DOI

      10.1063/1.4976707

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Magnetization control and detection of antiferromagnetic NiO2019

    • Author(s)
      Takahiro Moriyama
    • Organizer
      2019 Joint MMM-INTERMAG Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Antiferromagnetic coupling and spin Hall effect in Co / Ir-doped Cu / Co layers2019

    • Author(s)
      増田啓人、関 剛斎、窪田崇秀、高梨弘毅
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Anomalous Ettingshausen Effect in Ferrimagnetic Co-Gd2019

    • Author(s)
      T. Seki, A. Miura, K. Uchida, T. Kubota, and K. Takanashi
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Spin-Hall and Anisotropic Magnetoresistance Effects in Layered Structures with Ferrimagnetic Co-Gd Alloys2018

    • Author(s)
      Takeshi Seki, Weinan Zhou, Takahide Kubota, Koki Takanashi
    • Organizer
      IEEE International Magnetics Conference (INTERMAG) 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin-hall Magnetoresistance for Cr / Co100-xGdx / Pt Layered Structures2018

    • Author(s)
      Takeshi Seki, Weinan Zhou, Takahide Kubota, Koki Takanashi
    • Organizer
      The 5th International Conference of Asian Union of Magnetics Societies (ICAUMS 2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin-hall magnetoresistance in ferrimagnetic Co-Gd / nonmagnetic Pt layers2018

    • Author(s)
      Takeshi Seki, Weinan Zhou, Takahide Kubota, Gerrit Bauer, Koki Takanash
    • Organizer
      KINKEN-KIST Joint Symposium 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spin torque control of antiferromagnetic moments in NiO2018

    • Author(s)
      Takahiro Moriyama
    • Organizer
      International Conference on Magnetism
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spin-Hall Magnetoresistance in Pt / Co-Gd / Cr Layers2018

    • Author(s)
      Takeshi Seki, Weinan Zhou, Takahide Kubota, Koki Takanashi
    • Organizer
      23rd International Colloquium on Magnetic Films and Surfaces (ICMFS-2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetization control and detection of antiferromagnetic NiO2018

    • Author(s)
      Takahiro Moriyama
    • Organizer
      第42回日本磁気学会学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 反強磁性磁気構造に作用するスピンホールトルクの評価2018

    • Author(s)
      増田啓人、関 剛斎、窪田崇秀、高梨弘毅
    • Organizer
      第42回日本磁気学会学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] フェリ磁性金属/非磁性金属の積層構造におけるスピンホール磁気抵抗効果2018

    • Author(s)
      関 剛斎、周 偉男、窪田崇秀、バウアー・ゲーリット、高梨弘毅
    • Organizer
      日本金属学会2018年秋期(第163回)講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 強磁性およびフェリ磁性物質における熱磁気効果の可視化2018

    • Author(s)
      関 剛斎
    • Organizer
      ナノスピン放射光科学研究会「放射光を用いたナノスピン材料科学の新展開」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Spin-Hall and anisotropic magnetoresistance in Pt / ferrimagnetic Co-Gd / Cr layers2018

    • Author(s)
      T. Seki,W. Zhou, T. Kubota and K. Takanashi
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] CoGdアモルファス合金を用いた積層構造の磁気特性2017

    • Author(s)
      周偉男、関剛斎、森山貴広、小野輝男、高梨弘毅
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Resonant Magnetization Switching Conditions of an Exchange Coupled Bilayer under Spin Wave Excitation2017

    • Author(s)
      W. Zhou, T. Yamaji, T. Seki, H. Imamura, K. Takanashi
    • Organizer
      第64回応用物理学会春季学術講演会
    • Place of Presentation
      パシフィコ横浜(神奈川県・横浜市)
    • Year and Date
      2017-03-14
    • Related Report
      2016 Annual Research Report
  • [Presentation] スピン波を利用した交換結合膜における共鳴スイッチング2017

    • Author(s)
      関剛斎、周偉男、高梨弘毅
    • Organizer
      東北大学電気通信研究所 共同プロジェクト研究会
    • Place of Presentation
      東北大学(宮城県・仙台市)
    • Year and Date
      2017-01-31
    • Related Report
      2016 Annual Research Report
  • [Presentation] Temperature dependence of spin-orbit effective fields in Pt/GdFeCo2017

    • Author(s)
      W. S. Ham, S. Kim, D.-H. Kim, K.-J. Kim, T. Okuno, H. Yoshikawa, A. Tsukamoto, T. Moriyama, and T. Ono
    • Organizer
      INTERMAG 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 磁気ボルテックスダイナミクスを利用した交換結合膜における磁化スイッチング2017

    • Author(s)
      関剛斎、周偉男、高梨弘毅
    • Organizer
      磁気記録・情報ストレージ研究会(MR)・マルチメディアストレージ研究会(ITE-MMS)
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Magnetization Switching Assisted by Spin Wave Dynamics2017

    • Author(s)
      T. Seki, K. Takanashi
    • Organizer
      第41回日本磁気学会学術講演会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Spin Torque Vortex Oscillator Using Heusler Alloy Layers2017

    • Author(s)
      T. Seki, K. Takanashi
    • Organizer
      IUMRS-ICA 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spin transport in antiferromagnet2016

    • Author(s)
      Takahiro Moriyama
    • Organizer
      Korea-Japan Spin-Orbit Workshop
    • Place of Presentation
      九州大学(福岡県・福岡市)
    • Year and Date
      2016-12-15
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Switching Probability Under Spin Wave Excitation in an In-plane Magnetized L10-FePt / Ni81Fe19 Exchange-coupled Bilayer2016

    • Author(s)
      W. Zhou, T. Yamaji, T. Seki, H. Imamura, K. Takanashi
    • Organizer
      61st Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      New Orleans (USA)
    • Year and Date
      2016-11-01
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exchange bias dependence of damping parameter in antiferromagnetic multilayer2016

    • Author(s)
      Michinari Kamiya、Takahiro Moriyama、Kento Oda、kensho Tanaka、masashi kawaguchi、Kab-JIn Kim、Teruo Ono
    • Organizer
      第77回応用物理学会秋季学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県・新潟市)
    • Year and Date
      2016-09-16
    • Related Report
      2016 Annual Research Report
  • [Remarks] 研究室ホームページ

    • URL

      http://magmatelab.imr.tohoku.ac.jp

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report 2016 Annual Research Report
  • [Patent(Industrial Property Rights)] 磁気メモリ素子及び該磁気メモリ素子に用いる磁性材料2017

    • Inventor(s)
      森山貴広、小野輝男、関剛斎、周偉男、高梨弘毅
    • Industrial Property Rights Holder
      森山貴広、小野輝男、関剛斎、周偉男、高梨弘毅
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2017-132264
    • Filing Date
      2017
    • Related Report
      2017 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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