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ハーフメタル・フルホイスラー合金の形成とそのスピン機能MOSFETへの応用

Research Project

Project/Area Number 09J09476
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Electron device/Electronic equipment
Research InstitutionTokyo Institute of Technology

Principal Investigator

高村 陽太  東京工業大学, 大学院・総合理工学研究科, 特別研究員(DC1)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2011: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2010: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2009: ¥700,000 (Direct Cost: ¥700,000)
Keywordsフルホイスラー合金 / ハーフメタル強磁性体 / スピンMOSFET / Hanle効果 / スピントロニクス / スピン伝導 / RTA / CO_2FeSi / スピン注入 / 規則度 / Geチャネル / ハーフメタル / スピシMOSFET / rapid thermal annealing(RTA) / Siテクノロジー
Research Abstract

近年注目を集めている電子のスピンによる機能を有するMOSFET(スピンMOSFT)を実現する上で重要となるハーフメタルによるソース/ドレイン技術およびMOS反転層チャネルにおけるスピン注入/伝導の評価技術について研究を行い,スピンMOSFETに関する基盤技術を確立した.ハーフメタルによるソース/ドレイン技術ではホイスラー合金と呼ばれる特殊な強磁性体を,CMOSプロセスを用いて実現することを提案・実現した.特に今年度は,ラジカル酸窒化法で形成したSiO_xN_y膜をトンネル膜として用い,その上にホイスラー合金をRTAで形成することに成功した.この技術は,ハーフメタルをMOSFETのソース/ドレインに応用できる極めて重要な成果として注目を集めている.
さらに,今年度は,MOS反転チャネルのスピン伝導について,新たな評価法を提案し,その効果をシミュレーションから実証した.半導体内のスピン伝導の評価方法はいくつかの方法が検討されているが,スピン伝導のダイナミクスを詳細に評価するにはどれも不十分な状況だったが,スピン伝導におけるHanle効果に着目し,これをMOS反転層チャネルで評価できる新構造デバイスを提案した.そして,このデバイスのスピン信号がMOS反転層チャネルにおける実効移動度のユニバーサルカーブを反映することを見いだし,この現象を用いたスピン伝導の評価法を提案・検証した.この方法を用いることで各種散乱過程におけるスピンライフタイム等のダイナミクスを詳細に検討することが可能となる.

Report

(3 results)
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (28 results)

All 2012 2011 2010 2009

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (20 results)

  • [Journal Article] Fabrication of high quality Co_2FeSi/SiO_xN_y/Si(100) tunnel contacts using radical-oxynitridation formed SiO_xN_y barrier for Si-based spin transistors2012

    • Author(s)
      Y.Takamura, K.Hayashi, Y.Shuto, S.Sugahara
    • Journal Title

      Journal of Electronic Materials

      Volume: (掲載確定)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis and Control of the Hanle Effect in MOS Inversion Channels2012

    • Author(s)
      Y.Takamura, S.Sugahara
    • Journal Title

      Journal of Applied Physics

      Volume: (掲載確定)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis and Design of Hanle-Effect Spin Transistors at 300 K2011

    • Author(s)
      Y.Takamura S.Sugahara
    • Journal Title

      IEEE Magnetics Letters

      Volume: 2 Pages: 3000404-3000404

    • DOI

      10.1109/lmag.2011.2166378

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Epitaxial germanidation of full-Heusler Co_2FeGe alloy thin films formed by rapid thermal annealing2011

    • Author(s)
      Y.Takamura, T.Sakurai, R.Nakane, Y.Shuto, S.Sugahara
    • Journal Title

      Journal of Applied Physics

      Volume: 109 Issue: 7

    • DOI

      10.1063/1.3562042

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantitative analysis of atomic disorders in full-Heusler Co_2FeSi alloy thin films using x-ray diffraction with Co Kα and Cu Kα sources2010

    • Author(s)
      Yota Takamura, Ryosyo Nakane, Satoshi Sugahara
    • Journal Title

      J.Appl.Phys.

      Volume: Vol.107

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Formation of Co_2FeSi/SiO_xN_y/Si tunnel junctions for Si-based spin transistors2010

    • Author(s)
      Kengo Hayashi, Yota Takamura, Ryosyo Nakane, Satoshi Sugahara
    • Journal Title

      J.Appl.Phys.

      Volume: Vol.107

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Quantitative analysis of atomic disorders in full-Heusler Co_2FeSi alloy thin films using x-ray diffraction with Co Kα and Cu Kα sources2010

    • Author(s)
      YotaTakamura, Ryosho Nakane, Satoshi Sugahara
    • Journal Title

      Journal of Applied Physics (In press)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis of L2_1-ordering in full-Heusler Co_2FeSi alloy thin films formed by rapid thermal annealing2009

    • Author(s)
      YotaTakamura, Ryosho Nakane, Satoshi Sugahara
    • Journal Title

      Journal of Applied Physics 105

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] RTA法を用いたCo_2FeSiの形成における初期多層膜構造の影響2011

    • Author(s)
      林建吾, 高村陽太, 周藤悠介, 菅原聡
    • Organizer
      第58回応用物理学関係連合講演会
    • Place of Presentation
      厚木、神奈川工科大学
    • Year and Date
      2011-03-25
    • Related Report
      2010 Annual Research Report
  • [Presentation] RTAを用いたフルホイスラー合金Co_2FeSi_<1-x>Al_xの形成と評価(2)2011

    • Author(s)
      佐藤充浩, 高村陽太, 菅原聡
    • Organizer
      第58回応用物理学関係連合講演会
    • Place of Presentation
      厚木、神奈川工科大学
    • Year and Date
      2011-03-25
    • Related Report
      2010 Annual Research Report
  • [Presentation] Analysis of the Hanle effect in Si MOS inversion channels at 300K2011

    • Author(s)
      Y.Takamura, S.Sugahara
    • Organizer
      56th Annual Conf.on Magnetism and Magnetic Materials (MMM)
    • Place of Presentation
      米国アリゾナ州スコッツデール
    • Related Report
      2011 Annual Research Report
  • [Presentation] Analysis and design of Hanle-effect spin-transistor2011

    • Author(s)
      Y.Takamura, S.Sugahara
    • Organizer
      International Symposium on Advanced Hybrid Nano Devices (IS-AHND)
    • Place of Presentation
      東京都目黒区
    • Related Report
      2011 Annual Research Report
  • [Presentation] Formation and structural analysis of half-metallic Co_2FeSi/SiO_xN_y/Si contacts with radical-oxynitridation-SiO_xN_y tunnel barrier2011

    • Author(s)
      Y.Takamura, K.Hayashi, Y.Shuto, S.Sugahara
    • Organizer
      International Symposium on Advanced Hybrid Nano Devices (IS-AHND)
    • Place of Presentation
      東京都目黒区
    • Related Report
      2011 Annual Research Report
  • [Presentation] Preparation and characterization of L2_1-ordered full-Heusler Co_2FeSi_<1-x>Al_x alloy thin films formed by rapid thermal annealing2011

    • Author(s)
      M.Satoh, Y.Takamura, S.Sugahara
    • Organizer
      International Symposium on Advanced Hybrid Nano Devices (IS-AHND)
    • Place of Presentation
      東京都目黒区大岡山
    • Related Report
      2011 Annual Research Report
  • [Presentation] Characterization of L2_1-ordered full-Heusler Co_2FeSi_<1-x>Al_x alloy thin films formed by silicidation technique employing a silicon-on-insulator substrate2011

    • Author(s)
      M.Satoh, Y.Takamura, S.Sugahara
    • Organizer
      Electronic Materials Conf.(EMC) 2011
    • Place of Presentation
      米国カリフォルニア州サンタバーバラ
    • Related Report
      2011 Annual Research Report
  • [Presentation] Formation of half-metallic tunnel junctions of Co_2FeSi/SiO_xN_y/Si using radical oxynitridation technique2011

    • Author(s)
      Y.Takamura, K.Hayashi, Y.Shuto, S.Sugahara
    • Organizer
      Electronic Materials Conf.(EMC) 2011
    • Place of Presentation
      米国カリフォルニア州サンタバーバラ
    • Related Report
      2011 Annual Research Report
  • [Presentation] ラジカル酸窒化膜を用いたCFS/SiO_xN_y/Siトンネル接合の形成と構造評価2011

    • Author(s)
      高村陽太, 林建吾, 影井泰次郎, 周藤悠介, 菅原聡
    • Organizer
      第16回半導体スピン工学の基礎と応用(PASPS-16)
    • Place of Presentation
      東京都目黒区大岡山
    • Related Report
      2011 Annual Research Report
  • [Presentation] ラジカル酸窒化法を用いたCo_2FeSi/SiO_xN_y/Siトンネル接合の形成2011

    • Author(s)
      高村陽太, 林建吾, 周藤悠介, 菅原聡
    • Organizer
      第72回応用物理学会学術講演会
    • Place of Presentation
      山形大学小石川キャンパス
    • Related Report
      2011 Annual Research Report
  • [Presentation] スピンMOSFETにおけるHanle効果の解析2011

    • Author(s)
      高村陽太, 菅原聡
    • Organizer
      第72回応用物理学会学術講演会
    • Place of Presentation
      山形大学小石川キャンパス
    • Related Report
      2011 Annual Research Report
  • [Presentation] Comparative study of full-Heusler Co_2FeSi and Co_2FeGe alloy thin films formed by rapid thermal annealing2010

    • Author(s)
      Yota Takamura, Takuya Sakurai, Ryosyo Nakane, Yusuke Shuto, Satoshi Sugahara
    • Organizer
      55th Annual Conf.on Magnetism and Magnetic Materials
    • Place of Presentation
      Atlanta, USA
    • Year and Date
      2010-11-16
    • Related Report
      2010 Annual Research Report
  • [Presentation] Numerical simulation analysis of nonlocal multi-terminal devices for spin current detection in semiconductors2010

    • Author(s)
      Yusuke Shuto, Yota Takamura, Satoshi Sugahara
    • Organizer
      55th Annual Conf.on Magnetism and Magnetic Materials
    • Place of Presentation
      Atlanta, USA
    • Year and Date
      2010-11-16
    • Related Report
      2010 Annual Research Report
  • [Presentation] 非局所配置マルチターミナルデバイスの数値解析シミュレーション2010

    • Author(s)
      周藤悠介, 高村陽太, 菅原聡
    • Organizer
      第71回応用物理学会学術講演会
    • Place of Presentation
      長崎,長崎大学文教キャンパス
    • Year and Date
      2010-09-16
    • Related Report
      2010 Annual Research Report
  • [Presentation] RTAによるフルホイスラー合金Co_2FeGe薄膜のエピタキシャル形成2010

    • Author(s)
      櫻井卓也, 高村陽太, 中根了昌, 周藤悠介, 菅原聡
    • Organizer
      第71回応用物理学会学術講演会
    • Place of Presentation
      長崎,長崎大学文教キャンパス
    • Year and Date
      2010-09-14
    • Related Report
      2010 Annual Research Report
  • [Presentation] Disordered structures in full-Heusler Co_2FeSi alloy thin films formed by rapid thermal annealing2010

    • Author(s)
      Yota Takamura, Ryosyo Nakane, Satoshi Sugahara
    • Organizer
      The 6th International Conf. on the Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS-VI)
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2010-08-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Epitaxial germanidation of full-Heusler Co_2FeGe alloy thin films by rapid thermal annealing2010

    • Author(s)
      Takuya Sakurai, Yota Takamura, Ryosyo Nakane, Yusuke Shuto, Satoshi Sugahara
    • Organizer
      The 6th International Conf. on the Physics and Applications of Spin Related Phenomena in Semiconductors (PASPS-VI)
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      2010-08-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] X-ray diffraction study for atomic disorder in full-Heulser alloy thin films using Co x-ray source2010

    • Author(s)
      高村陽太, 菅原聡
    • Organizer
      11th MMM-Intermag Joint Conference
    • Place of Presentation
      アメリカ合衆国, ワシントンDC
    • Year and Date
      2010-01-22
    • Related Report
      2009 Annual Research Report
  • [Presentation] Co線源X線回折を用いたフルホイスラー合金の不規則構造評価法の提案2009

    • Author(s)
      高村陽太, 菅原聡
    • Organizer
      第70回応用物理学会学術講演会
    • Place of Presentation
      富山, 富山大学
    • Year and Date
      2009-09-10
    • Related Report
      2009 Annual Research Report
  • [Presentation] Half-metallic ferromagnet technologies for spin-functional MOSFETs2009

    • Author(s)
      高村陽太, 菅原聡
    • Organizer
      Global COE International Symposium "Silicon Nano Devices in 2030 : Prospects by world's leading scientists"
    • Place of Presentation
      大岡山, 東京工業大学
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2024-03-26  

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