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磁性体におけるスピン軌道トルクの研究

Publicly Offered Research

Project Areanano spin conversion science
Project/Area Number 15H01017
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionOsaka University

Principal Investigator

三輪 真嗣  大阪大学, 基礎工学研究科, 准教授 (20609698)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Keywordsスピントロニクス / スピンエレクトロニクス
Outline of Annual Research Achievements

今年度はFe/MgO/Vヘテロエピタキシャルトンネル接合における巨大な界面スピン軌道トルクの発現条件最適化と機構解明を目的として研究を押し進めた。まずトンネル接合の規格化面積抵抗の大きさを様々に変えてスピントルクを評価した。これによりFe/MgO/V接合で得られたトルクはほぼ電圧誘起であることがわかった。界面スピン軌道相互作用に起因する通称ラッシュバトルクと呼ばれる電流誘起トルクがほぼ観測されなかったこと、そして非常に薄い酸化マグネシウムを採用したときのみに大きな電圧誘起トルクが観測されたことは驚くべき発見である。また、このトルクのバイアス電圧依存特性を精査すると、非線形でありゼロバイアス付近でピークを持つことがわかった。これは非線形電圧スピントルクの発現に関してフェルミ面付近の電子状態が重要であることを示唆している。
次にスピントルクの発現機構を探るため、トンネル異方性磁気抵抗効果のバイアス及び磁化角度依存特性を精査した。本研究ではFe/MgO/Vと対抗電極に非磁性Vを用いているため、両極性バイアスに対してトンネル異方性磁気抵抗効果を評価できるてんが特徴である。トンネル異方性磁気抵抗効果の2回対称成分と4回対称成分のバイアス依存特性を精査した結果、フェルミ面付近にFe/MgOの界面準位があることを見出した。従って得られたスピントルクとこの界面準位に密接な関係がある可能性が大きい。
このようにFe/MgOというシンプルながら非常に高品質な金属/絶縁体界面を用意し、本研究課題では強磁性金属と絶縁体の界面準位に起因する高効率なスピントルクの発現を見出した。これは今後の界面物性研究の新しい可能性を切り開くものと期待される。

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (47 results)

All 2017 2016 2015

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Acknowledgement Compliant: 3 results) Presentation (42 results) (of which Int'l Joint Research: 13 results,  Invited: 2 results)

  • [Journal Article] Electric field modulation of tunneling anisotropic magnetoresistance in tunnel junctions with antiferromagnetic electrodes2016

    • Author(s)
      Minori Goto, Kohei Nawaoka, Shinji Miwa, Shohei Hatanaka, Norikazu Mizuochi, and Yoshishige Suzuki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 55 Issue: 8 Pages: 080304-080304

    • DOI

      10.7567/jjap.55.080304

    • NAID

      210000146915

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Observation of large spin accumulation voltages in non-degenerate Si spin devices due to spin drift effect2016

    • Author(s)
      T. Tahara, Y. Ando, M. Kamno, H. Koike, K Tanaka, S. Miwa, Y. Suzuki, T. Sasaki, T. Oikasa, and M. Shiraishi
    • Journal Title

      Physical Review B

      Volume: 93 Issue: 21 Pages: 214406-214406

    • DOI

      10.1103/physrevb.93.214406

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Observation of thermally driven field-like spin torque in magnetic tunnel Junctions2016

    • Author(s)
      Arnab Bose, Amit Kumar Shukla, Katsunori Konishi, Sourabh Jain, Nagarjuna Asam, Swapnil Bhuktare, Hanuman Singh, Duc Duong Lam, Yuya Fujii, Shinji Miwa, Yoshishige Suzuki, and Ashwin A. Tulapurkar
    • Journal Title

      Applied Physics Letters

      Volume: 109 Issue: 3

    • DOI

      10.1063/1.4958833

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Coherent microwave generation by spintronic feedback oscillator2016

    • Author(s)
      Dinesh Kumar, K. Konishi, Nikhil Kumar, S. Miwa, A. Fukushima, K. Yakushiji, S. Yuasa, H. Kubota, C. V. Tomy, A. Prabhakar, Y. Suzuki & A. Tulapurkar
    • Journal Title

      Scientific Reports

      Volume: 6 Issue: 1

    • DOI

      10.1038/srep30747

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tunne anisotropic magnetoresistance in CoFeB|MgO|Ta junctions2015

    • Author(s)
      S. Hatanaka, S. Miwa, K. Matsuda, K. Nawaoka, K. Tanaka, H. Morishita, M. Goto, N. Mizuochi, T. Shinjo, and Y. Suzuki
    • Journal Title

      Applied Physics Letters

      Volume: 107 Issue: 8

    • DOI

      10.1063/1.4929682

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Au(001)表面上への銅フタロシアニン超薄膜の結晶成長評価2017

    • Author(s)
      河辺健志
    • 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] 希土類電極を用いた有機薄膜ダイオードの作製2017

    • Author(s)
      下瀬弘輝
    • 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] Fe|Pt|MgO界面ジャロシンスキー守谷相互作用の電圧変調におけるPt膜厚依存2017

    • Author(s)
      縄岡幸平
    • 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] 高精度X線磁気円二色性分光による外部電圧下におけるFe超薄膜の磁気モーメントの評価2017

    • Author(s)
      塚原拓也
    • 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
      2017-03-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Influence of Pd layer insertion at Fe/MgO interface on spin-wave dynamics2017

    • Author(s)
      SUWARDY JOKO
    • 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] Magnetic properties of V/Fe/Bi/MgO multilayer characterized by spin-wave spectroscopy2017

    • Author(s)
      宮風里紗
    • 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] Magnetic moments of Co-phthalocyanine grown on Fe(001)2017

    • Author(s)
      河辺健志
    • 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] Fabrication of high current density organic thin-film diode with rare-earth electrode2017

    • Author(s)
      下瀬弘輝
    • 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] Spin-torque and orbital magnetism at Fe|MgO interface2017

    • Author(s)
      三輪真嗣
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-03
    • Related Report
      2016 Annual Research Report
  • [Presentation] X-ray absorption spectroscopy on Co-phtalocyanine molecules2017

    • Author(s)
      河辺健志
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Conduction and magnetic properties of organic thin-film diode2017

    • Author(s)
      下瀬弘輝
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Interface magnetism of epitaxial Fe/Pd/MgO multilayer characterized by spin-wave spectroscopy2017

    • Author(s)
      SUWARDY JOKO
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Characterization of magnetic moments in ultrathin Fe under electric fields2017

    • Author(s)
      塚原拓也
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Characterization of V/Fe/Bi/MgO multilayer by spin-wave spectroscopy2017

    • Author(s)
      宮風里紗
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Enhancement of voltage induced interfacial Dzyaloshinskii-Moriya interaction at Fe|MgO by one monolayer insertion of Pt2017

    • Author(s)
      縄岡幸平
    • Organizer
      平成28年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東京工業大学(東京都・目黒区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Bi atomic layer on Fe (001) characterized by Reflective High Energy Electron Diffraction2016

    • Author(s)
      宮風里紗
    • Organizer
      International School on Spintronics and Spin-Orbitronics
    • Place of Presentation
      九州大学(福岡県・福岡市)
    • Year and Date
      2016-12-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] X-ray magnetic circular dichroism spectroscopy of ultrathin Pt and Bi2016

    • Author(s)
      塚原拓也
    • Organizer
      International School on Spintronics and Spin-Orbitronics
    • Place of Presentation
      九州大学(福岡県・福岡市)
    • Year and Date
      2016-12-16
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Voltage control of magnetic properties in ferromagnetic metals2016

    • Author(s)
      三輪真嗣
    • 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] Large interfacial spin-orbit torque in Fe|MgO|V tunnel junctions2016

    • Author(s)
      三輪真嗣
    • Organizer
      MMM2016
    • Place of Presentation
      New Orleans, Louisiana(USA)
    • Year and Date
      2016-11-04
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Voltage control of platinum orbit: contribution to interfacial magnetic anisotropy change2016

    • Author(s)
      三輪真嗣
    • Organizer
      MMM2016
    • Place of Presentation
      New Orleans, Louisiana(USA)
    • Year and Date
      2016-11-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enhancement of voltage induced interfacial Dzyaloshinskii- Moriya interaction at Fe|MgO by one monolayer insertion of Pt2016

    • Author(s)
      縄岡幸平
    • Organizer
      MMM2016
    • Place of Presentation
      New Orleans, Louisiana(USA)
    • Year and Date
      2016-11-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin conversion at interface of metal and dielectric2016

    • Author(s)
      三輪真嗣
    • Organizer
      NSCS-QSD 2016
    • Place of Presentation
      東京大学(東京都・文京区)
    • Year and Date
      2016-10-13
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Enhancement of voltage induced interfacial Dzyaloshinskii-Moriya interaction at Fe|MgO by one monolayer insertion of Pt2016

    • Author(s)
      縄岡幸平
    • Organizer
      The 2nd ImPACT International Symposium on Sprintronic Memory, Circuit and Storage
    • Place of Presentation
      つくば国際会議場(茨城県・つくば市)
    • Year and Date
      2016-09-30
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Large interfacial spin-orbit torque in metal|dielectric interface2016

    • Author(s)
      三輪真嗣
    • Organizer
      SPICE2016(Workshop on Antiferromagnetic Spintronics)
    • Place of Presentation
      Johannes Gutenberg-University Mainz, Mainz, (Germany)
    • Year and Date
      2016-09-29
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Voltage control of interfacial magnetic anisotropy at metal|dielectric interface2016

    • Author(s)
      三輪真嗣
    • Organizer
      EU-JAPAN Workshop on Computational Materials Design and Realization for Spintronics, Moltronics, Quantronics, Superconductivity and Topotronics
    • Place of Presentation
      Peter Grunberg Institute, Julich Research Centre, Julich (Germany)
    • Year and Date
      2016-09-21
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Perpendicular magnetic anisotropy of epitaxially grown Fe/Bi/MgO multilayere2016

    • Author(s)
      宮風里紗
    • 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
      2016-09-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Fe|MgO界面ジャロシンスキー守谷相互作用の電圧変調に対するPt単原子層挿入効果2016

    • Author(s)
      縄岡幸平
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2016-09-14
    • Related Report
      2016 Annual Research Report
  • [Presentation] X-ray spectroscopy of Pt and Bi atomic layers on Fe(001) under external voltage2016

    • Author(s)
      塚原拓也
    • 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
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Interfacial spin-orbit torque in Fe|MgO|V tunnel junctions2016

    • Author(s)
      Philipp Risius
    • 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
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Epitaxial copper-phthalocyanine thin film grown on Au (001) buffer2016

    • Author(s)
      三輪真嗣
    • Organizer
      ICMM2016
    • Place of Presentation
      Sendai International Center(宮城県・仙台市)
    • Year and Date
      2016-09-07
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 金属/絶縁体界面における磁性の分光研究2016

    • Author(s)
      三輪真嗣
    • Organizer
      大阪大学基礎工学研究科附属スピントロニクス学術連携教育センター・キックオフ・シンポジウム
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2016-06-10
    • Related Report
      2016 Annual Research Report
  • [Presentation] Growth characteristics of Bi thin film on Fe (001)2016

    • Author(s)
      宮風里紗
    • Organizer
      Workshop for the Recent Development in the Spintronics
    • Place of Presentation
      越前町コミュニティセンター(福井県・越前町)
    • Year and Date
      2016-05-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] Interfacial spin-orbit torque in tunnel junction2016

    • Author(s)
      三輪真嗣
    • Organizer
      新学術領域研究A01班(磁気的スピン変換班)班内研究会
    • Place of Presentation
      九州大学(福岡県・福岡市)
    • Year and Date
      2016-04-19
    • Related Report
      2016 Annual Research Report
  • [Presentation] Giant interfacial spin-orbit torque in Fe|MgO|V tunnel junction2016

    • Author(s)
      三輪真嗣
    • Organizer
      新学術領域研究A01班(磁気的スピン変換班)班内研究会
    • Place of Presentation
      九州大学(福岡県・福岡市)
    • Year and Date
      2016-04-18
    • Related Report
      2016 Annual Research Report
  • [Presentation] Electric -field induced spin state change at Mnlr/MgO interface2016

    • Author(s)
      後藤 穣
    • Organizer
      "Nano Spin Conversion Science" Workshop in Kansai for Young Researchers/関西若手ワークショップ
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2016-04-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Giant interfacial spin-orbit torque in Fe/MgO/V tunnel junction2016

    • Author(s)
      三輪真嗣
    • Organizer
      "Nano Spin Conversion Science" Workshop in Kansai for Young Researchers/関西若手ワークショップ
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2016-04-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Voltage induction of the interfacial Dzyaloshinskii-Moriya interaction at Fe|MgO2016

    • Author(s)
      縄岡孝平
    • Organizer
      "Nano Spin Conversion Science" Workshop in Kansai for Young Researchers/関西若手ワークショップ
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2016-04-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Growth characteristics of Bi atomic layers on Fe(001)2016

    • Author(s)
      宮風里紗
    • Organizer
      "Nano Spin Conversion Science" Workshop in Kansai for Young Researchers/関西若手ワークショップ
    • Place of Presentation
      大阪大学(大阪府・豊中市)
    • Year and Date
      2016-04-15
    • Related Report
      2016 Annual Research Report
  • [Presentation] Tunnel anisotropic magnetoresistance in CoFeB|MgO|Ta junctions.2016

    • Author(s)
      S. Hatanaka, S. Miwa, K. Matsuda, K. Nawaoka,K. Tanaka, H. Morishita, M. Goto, N. Mizuochi, Y. Suzuki
    • Organizer
      2016 Joint MMM-Intermag Conference
    • Place of Presentation
      Sandiego, USA
    • Year and Date
      2016-01-13
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin torque in Fe|MgO|V tunnel junction2016

    • Author(s)
      三輪真嗣
    • Organizer
      平成27年度「ナノスピン変換科学」年次報告会
    • Place of Presentation
      東北大学(宮城県・仙台市)
    • Year and Date
      2016-01-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] Ta/MgO/CoFeB接合における強磁性共鳴および電圧効果2015

    • Author(s)
      畠中翔平,三輪真嗣,縄岡孝平,後藤穣,森下弘樹,水落憲和,鈴木義茂
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      関西大学(大阪府・吹田市)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Annual Research Report
  • [Presentation] Detection of ferromagnetic resonance in CoFeB2015

    • Author(s)
      S. Hatanaka, S. Miwa, K. Matsuda, K. Nawaoka, K. Tanaka, H. Morishita, N. Mizuochi, T. Shinjo, Y. Suzuki
    • Organizer
      New Perspectives in Spintronic and Mesoscopic Physics
    • Place of Presentation
      Univ.of Tokyo(東京都・文京区)
    • Year and Date
      2015-06-11
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2018-03-28  

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