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2012 Fiscal Year Final Research Report

Highly-efficient spin-polarized current source using half-metallic ferromagnet/superconductor junctions.

Research Project

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Project/Area Number 22560001
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionHokkaido University

Principal Investigator

MATSUDA Ken-ichi  北海道大学, 大学院・情報科学研究科, 助教 (80360931)

Co-Investigator(Kenkyū-buntansha) YAMAMOTO Masafumi  北海道大学, 大学院・情報科学研究科, 教授 (10322835)
Co-Investigator(Renkei-kenkyūsha) UEMURA Tetsuya  北海道大学, 大学院・情報科学研究科, 准教授 (21360140)
Project Period (FY) 2010 – 2012
Keywordsスピントロニクス / エピタキシャル成長 / 新機能材料
Research Abstract

In this study, epitaxial growth of Co-based Heusler alloy/superconductor hetero-structures were achieved. Moreover, the existence of spin-polarized superconducting components was implied by the conductance measurement using the hetero-structures.

  • Research Products

    (44 results)

All 2013 2012 2011 2010 Other

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (34 results) Remarks (1 results)

  • [Journal Article] Effect of MgO Barrier Insertion on Spin-Dependent Transport Properties of CoFe/n-GaAs Heterojunctions2012

    • Author(s)
      T. Akiho, T. Uemura, M. Harada, K.-i. Matsuda, and M. Yamamoto
    • Journal Title

      Jpn. J. Appl. Phys

      Volume: vol.51 Pages: 02BM01-1-02BM01-5

    • DOI

      DOI:10.1143/JJAP.51.02BM01

    • Peer Reviewed
  • [Journal Article] Critical effect of spin-dependent transport in a tunnel barrier on enhanced Hanle-type signals observed in three-terminal geometry2012

    • Author(s)
      T. Uemura, K. Kondo, J. Fujisawa, K.-i.Matsuda, and M. Yamamoto
    • Journal Title

      Appl. Phys. Lett

      Volume: vol.101 Pages: 132411-1-132411-4

    • DOI

      DOI:10.1063/1.4754545

    • Peer Reviewed
  • [Journal Article] Influence of GaAs surface structure on tunneling anisotropic magnetoresistance and magnetocrystalline anisotropy inepitaxial Co50Fe50/n-GaAs junctions2011

    • Author(s)
      T. Uemura, M. Harada, T. Akiho, K.-i.Matsuda, M. Yamamoto
    • Journal Title

      Appl. Phys. Lett

      Volume: vol.98 Pages: 102503-1-102503-3

    • DOI

      DOI:10.1063/1.3561759

    • Peer Reviewed
  • [Journal Article] Non-local detection of spin-polarized electronsat room temperature in Co_50Fe_50/GaAsSchottky tunnel junctions2011

    • Author(s)
      T. Uemura, T. Akiho, M. Harada, K.-i.Matsuda, and M. Yamamoto
    • Journal Title

      Appl. Phys. Lett

      Volume: vol. 99 Pages: 082108-1-082108-3

    • DOI

      DOI:10.1063/1.3630032

    • Peer Reviewed
  • [Journal Article] Epitaxial growthof Heusler alloyCo_2MnSi/MgO heterostructures onGe(001) substrates2011

    • Author(s)
      G.-f. Li, T. Taira, K.-i. Matsuda, M.Arita, T. Uemura, and M. Yamamoto
    • Journal Title

      Appl. Phys. Lett

      Volume: vol.98 Pages: 262505-1-262505-3

    • DOI

      DOI:10.1063/1.3605675

    • Peer Reviewed
  • [Journal Article] Suppression of in-plane tunneling anisotropicmagnetoresistance effect in Co_2MnSi /MgO / n-GaAs and CoFe / MgO / n-GaAsjunctions by inserting a MgO barrier2011

    • Author(s)
      T. Akiho, T. Uemura, M. Harada, K.-i.Matsuda, and M. Yamamoto
    • Journal Title

      Appl. Phys. Lett

      Volume: vol.98 Pages: 232109-1-232109-3

    • DOI

      DOI:10.1063/1.3595311

    • Peer Reviewed
  • [Journal Article] Fabrication and the Transport Properties of NbN /Co_2Cr_0.6Fe_0.4A / NbN Lateral Junctions2010

    • Author(s)
      S. Imai, K.-i. Matsuda, T. Ishikawa, T.Uemura, M. Yamamoto
    • Journal Title

      Physica C

      Volume: vol.470 Pages: S851-S853

    • DOI

      DOI:10.1016/j.physc.2009.10.034

    • Peer Reviewed
  • [Journal Article] Internal electric field influence on tunneling anisotropic magnetoresistance in epitaxial ferromagnet/n-GaAs junctions2010

    • Author(s)
      T. Uemura, M. Harada, K.-i. Matsuda, M.Yamamoto
    • Journal Title

      Appl. Phys. Lett

      Volume: vol.96 Pages: 252106-1-252106-3

    • DOI

      DOI:10.1063/1.3456558

    • Peer Reviewed
  • [Journal Article] Giant Oscillations in Spin-Dependent Tunneling Resistances as a Function of Barrier Thickness in Fully Epitaxial Magnetic Tunnel Junctions with a MgO Barrier2010

    • Author(s)
      T. Marukame, T. Ishikawa, T. Taira, K.-i. Matsuda. T. Uemura, M. Yamamoto
    • Journal Title

      Phys. Rev. B

      Volume: vol.81 Pages: 134432-1-134432-5

    • DOI

      DOI:10.1103/PhysRevB.81.134432

    • Peer Reviewed
  • [Presentation] Influence of interface termination layeron temperature dependenceof tunneling magnetoresistance of Co_2MnSi / MgO-based magnetic tunnel junctions2013

    • Author(s)
      H.-x. Liu, Y. Honda, K.-i. Matsuda, T.Uemura, M. Yamamoto, F.-y. Shi, and P. Voyles
    • Organizer
      第60回応用物理学会春季学術講演会
    • Place of Presentation
      神奈川工科大学,神奈川県
    • Year and Date
      2013-03-30
  • [Presentation] Annealing temperature dependence of spin signalsobserved in Co2MnSi / CoFe /n-GaAs through four-terminal non-local geometry2013

    • Author(s)
      T. Akiho, J. Shan, K.-i. Matsuda, M.Yamamoto, and T. Uemura
    • Organizer
      第60回応用物理学会春季学術講演会
    • Place of Presentation
      神奈川工科大学,神奈川県
    • Year and Date
      2013-03-28
  • [Presentation] Transient effects on oblique Hanle signals observed in ferromagnet/semiconductor heterojunctions with non-local four-terminal configuration2013

    • Author(s)
      T. Akiho, J.-h. Shan, K.-i. Matsuda, M.Yamamoto, and T. Uemura
    • Organizer
      12th Joint MMM/Intermag Conf
    • Place of Presentation
      Chicago, Illinois, USA
    • Year and Date
      2013-01-18
  • [Presentation] Influence of interfacial structural properties on tunnel magnetoresistance in epitaxialmagnetic tunnel junctions with Co_2MnSi electrode and MgO barrier2013

    • Author(s)
      H.-x. Liu, Y. Honda, K.-i. Matsuda, M.Arita, T. Uemura, and M. Yamamoto
    • Organizer
      12thJoint MMM/Intermag Conf
    • Place of Presentation
      Chicago, Illinois, USA
    • Year and Date
      2013-01-17
  • [Presentation] 高スピン偏極材料を用いたGaAsへのスピン注入2012

    • Author(s)
      植村哲也,秋保貴史,松田健一,山本眞史
    • Organizer
      第17回半導体スピン工学の基礎と応用(PASPS17)
    • Place of Presentation
      九州大学伊都キャンパス,稲森フロンティア研究センター,福岡県
    • Year and Date
      2012-12-19
  • [Presentation] CoFe/MgO/SC(SC=SiorGe)におけるHanle信号の半導体種依存性2012

    • Author(s)
      植村哲也,李桂芳,藤澤潤,松田健一,山本眞史
    • Organizer
      第17回半導体スピン工学の基礎と応用(PASPS17)
    • Place of Presentation
      九州大学伊都キャンパス,稲森フロンティア研究センター,福岡県
    • Year and Date
      2012-12-19
  • [Presentation] Electrical spin injection and electrical detection of dynamic nuclear polarization in ferromagnet / semiconductor heterojunctions2012

    • Author(s)
      T. Akiho, J.-h. Shan, K.-i. Matsuda, M.Yamamoto, and T. Uemura
    • Organizer
      International Workshop on Spintronic Nano Materials 2012
    • Place of Presentation
      Hokkaido Univ., Sapporo, Japan
    • Year and Date
      2012-11-05
  • [Presentation] Enhanced coherent tunneling contribution in epitaxial magnetic tunnel junctionswith a Co2MnSi electrode and a MgObarrier due to improved interfacial structural properties2012

    • Author(s)
      H.-x. Liu, Y. Honda, K.-i. Matsuda, T.Uemura, and M. Yamamoto
    • Organizer
      The 2nd Int'l Conf. of Asia Union of Magnetics Societies (ICAUMS 2012), The 36th Annual Conf. on Magnetics in Japan
    • Place of Presentation
      Nara Prefectural New Public Hall, Nara, Japan
    • Year and Date
      2012-10-02
  • [Presentation] Spin transport properties of fully epitaxial magneticjunctions2012

    • Author(s)
      H.-x. Liu, T. Taira, Y. Honda, K.-i.Matsuda, T. Uemura, M. Yamamoto, Y. Miura, and M. Shirai
    • Organizer
      2012 Int'l Conf. on Solid State Devices and Materials (SSDM 2012)
    • Place of Presentation
      Kyoto International Conference Center, Kyoto, Japan
    • Year and Date
      2012-09-27
  • [Presentation] Transient oblique Hanle signals observed inCo_2MnSi/CoFe/n-GaAs with non-local four-terminal configuration2012

    • Author(s)
      J.-h. Shan, T. Akiho, K.-i. Matsuda, M.Yamamoto, and T. Uemura
    • Organizer
      2012Int'l Conf. on Solid State Devices and Materials (SSDM 2012)
    • Place of Presentation
      Kyoto International Conference Center, Kyoto, Japan
    • Year and Date
      2012-09-27
  • [Presentation] Tunnel barrier thickness dependence of Hanle-type signals in CoFe / MgO / n-Si and CoFe / MgO / n-Ge junctions investigated through three-terminal configuration2012

    • Author(s)
      T. Uemura, G.-f. Li, J. Fujisawa, K.Konda, K.-i. Matsuda, and M. Yamamoto
    • Organizer
      2012 Int'l Conf. on Solid State Devices and Materials (SSDM 2012)
    • Place of Presentation
      Kyoto International Conference Center, Kyoto, Japan
    • Year and Date
      2012-09-27
  • [Presentation] Tunnel barrier thickness dependence of Hanle-type signals in CoFe/MgO/n-Ge tunnel junctions investigated through three-terminal configuration2012

    • Author(s)
      G.-f. Li, M. Miki, K.-i. Matsuda, T.Uemura, and M. Yamamoto
    • Organizer
      The17th Int'l Conf. on Molecular Beam Epitaxy (MBE 2012)
    • Place of Presentation
      Nara Prefectural New Public Hall, Nara, Japan
    • Year and Date
      2012-09-24
  • [Presentation] 非局所四端子配置を用いたCo_2MnSi/CoFe/n-GaAsショットキートンネル接合におけるoblique Hanle信号の過渡特性2012

    • Author(s)
      単津海,秋保貴史,松田健一,山本眞史,植村哲也
    • Organizer
      2012年(平成24年)秋季第73回応用物理学会学術講演会
    • Place of Presentation
      愛媛大学&松山大学,愛媛県
    • Year and Date
      2012-09-14
  • [Presentation] MgO tunnel barrier thickness dependence of three-terminal Hanle-type signals in CoFe/MgO/n-Ge tunnel junctions2012

    • Author(s)
      G.-f. Li,M. Miki, K.-i. Matsuda, T.Uemura, and M. Yamamoto
    • Organizer
      2012年(平成24年)秋季第73回応用物理学会学術講演会
    • Place of Presentation
      愛媛大学&松山大学,愛媛県
    • Year and Date
      2012-09-13
  • [Presentation] Co_2MnSi/MgO/NbN接合を用いたホイスラー合金Co_2MnSiのスピン偏極率評価2012

    • Author(s)
      松田健一,篠木崇帆,植村哲也,山本眞史
    • Organizer
      2012年(平成24年)秋季第73回応用物理学会学術講演会
    • Place of Presentation
      愛媛大学&松山大学,愛媛県
    • Year and Date
      2012-09-12
  • [Presentation] Temperature dependence of spin-dependent tunneling resistances of fully epitaxial Co_2MnSi-based magnetic tunnel junctions2012

    • Author(s)
      H.-x. Liu, Y. Honda, K.-i. Matsuda, T.Uemura, and M. Yamamoto
    • Organizer
      2012年(平成24年)秋季第73回応用物理学会学術講演会
    • Place of Presentation
      愛媛大学&松山大学,愛媛県
    • Year and Date
      2012-09-11
  • [Presentation] Spin-polarization measurements for Co_2MnSi using Co_2MnSi/MgO/NbN epitaxial tunnel junctions2012

    • Author(s)
      Ken-ichi Matsuda, Takaho Shinoki, Tomoyuki Taira, Tetsuya Uemura, and Masafumi Yamamoto
    • Organizer
      The 19th Int'l Conf. on Magnetism (ICM2012)
    • Place of Presentation
      BEXCO, Busan,Korea
    • Year and Date
      2012-07-13
  • [Presentation] Possibility of Superconducting Proximity Effect of Equal-spin Triplet Components in NbN/Co2Cr0.6Fe0.4Al/NbN Junctions2012

    • Author(s)
      Ken-ichi Matsuda, Tetsuya Uemura, and Masafumi Yamamoto
    • Organizer
      Int'l Conf. on Topological Quantum Phenomena (TQP2012)
    • Place of Presentation
      Nagoya University, Nagoya, Japan
    • Year and Date
      2012-05-19
  • [Presentation] Temperature dependence of spin-dependent tunneling conductances of fully epitaxial Co_2MnSi-based magnetic tunnel junctions2012

    • Author(s)
      H.-x. Liu, Y. Honda, K.-i. Matsuda, T.Uemura, and M. Yamamoto
    • Organizer
      Int'l Magnetics Conf. 2012 (INTERMAG 2012)
    • Place of Presentation
      Vancouver Convention Center, Vancouver, Canada
    • Year and Date
      2012-05-10
  • [Presentation] Electrical spin injection from Co_2MnSi Heusler alloy into GaAs and electrical detection of dynamic nuclear polarization2012

    • Author(s)
      T. Akiho, T. Uemura, K.-i. Matsuda, and M. Yamamoto
    • Organizer
      Int'l Magnetics Conf. 2012 (INTERMAG2012)
    • Place of Presentation
      Vancouver Convention Center, Vancouver, Canada
    • Year and Date
      2012-05-08
  • [Presentation] MgO thickness dependence of spin accumulation signal in Co_50Fe_50/MgO/Si2012

    • Author(s)
      T. Uemura, J. Fujisawa, K.-i. Matsuda, and M. Yamamoto
    • Organizer
      Int'l Magnetics Conf. 2012 (INTERMAG 2012)
    • Place of Presentation
      Vancouver Convention Center, Vancouver, Canada
    • Year and Date
      2012-05-08
  • [Presentation] Tunnel magnetoresistance in fully epitaxial CoFe/MgO/CoFe magnetic tunnel junctions on Ge(001) substrates via a MgO interlayer2012

    • Author(s)
      G. -f. Li, T. Taira, H.-x. Liu, K.-i.Matsuda, T. Uemura, and M. Yamamoto
    • Organizer
      5th Int'l Symposium on Global COE Program of Center for Next-Generation Information Technology Based on Knowledge Discovery and Knowledge Federation
    • Place of Presentation
      Hokkaido University, Sapporo, Japan
    • Year and Date
      2012-01-16
  • [Presentation] Temperature dependence of spin-dependent tunneling resistances of MgO-buffered Co MnSi / MgO / Co MnSi magnetic tunnel2 28. G. -f. Li, T. Taira, H.-x. Liu, K.-i.Matsuda, T. Uemura, and M. Yamamoto, "Tunnel magnetoresistance in fully epitaxial CoFe/MgO/CoFe magnetic tunnel junctions on Ge(001) substrates via a MgO interlayer2012

    • Author(s)
      Y. Honda, H.-x. Liu, K.-i. Matsuda, T.Uemura, and M. Yamamoto
    • Organizer
      5th Int'l Symposium on Global COE Program of Center for Next-Generation Information Technology Based on Knowledge Discovery and Knowledge Federation
    • Place of Presentation
      Hokkaido University, Sapporo,Japan
    • Year and Date
      2012-01-16
  • [Presentation] GaAsショットキートンネル障壁を介した強磁性体からInGaAsチャネルへのスピン注入2012

    • Author(s)
      鳥野剛史,松田健一,山本眞史,植村哲也
    • Organizer
      2013年(平成25年)第48回応用物理学会北海道支部学術講演会
    • Place of Presentation
      釧路市生涯学習センター「まなぼっと幣舞」,釧路市
    • Year and Date
      2012-01-12
  • [Presentation] Nb/Cu_50Ni_50二層薄膜の電気伝導特性と超電導近接効果2012

    • Author(s)
      蛯名優也,松田健一,植村哲也,山本眞史
    • Organizer
      2013年(平成25年)第48回応用物理学会北海道支部学術講演会
    • Place of Presentation
      釧路市生涯学習センター「まなぼっと幣舞」,釧路市
    • Year and Date
      2012-01-12
  • [Presentation] Co_2MnSi/CoFe/MgO/SiにおけるHanle信号のMgO膜厚依存性2012

    • Author(s)
      藤澤潤,松田健一,山本眞史,植村哲也
    • Organizer
      2013年(平成25年)第48回応用物理学会北海道支部学術講演会
    • Place of Presentation
      釧路市生涯学習センター「まなぼっと幣舞」,釧路市
    • Year and Date
      2012-01-12
  • [Presentation] Spin-dependent transport properties of fully epitaxial magnetic tunnel junctions of CoFe/MgO/CoFe ultrathin layer /Co2MnSi2011

    • Author(s)
      H.-x. Liu, T. Taira, Y. Honda, K. -i.Matsuda, T. Uemura, M. Yamamoto, Y. Miura, and M. Shirai
    • Organizer
      56th Annual Conf. onMagnetism & Magnetic Materials, JW Marriott Desert Ridge
    • Place of Presentation
      Scottsdale, Arizona, USA
    • Year and Date
      2011-11-01
  • [Presentation] Epitaxial growth of Co2MnSi/MgO heterostructures on Ge(001) substrates2011

    • Author(s)
      本田佑輔,平田進之佑,李桂芳, 劉宏喜,松田健一,植村哲也,山本眞史
    • Organizer
      2011年(平成23年)春季第58回応用物理学関係連合講演会.
    • Place of Presentation
      神奈川工科大学(厚木市)
    • Year and Date
      2011-03-26
  • [Presentation] Epitaxial growth of Co2MnSi/MgO heterostructures on Ge(001) substrates2011

    • Author(s)
      G.-f.Li, T.Taira, K.-i.Matsuda, T.Uemura, M.Yamamoto
    • Organizer
      2011年(平成23年)春季第58回応用物理学関係連合講演会
    • Place of Presentation
      神奈川工科大学(厚木市)
    • Year and Date
      2011-03-25
  • [Presentation] Co_50Fe_50/n-GaAsにおけるスピン注入の電気的検出2011

    • Author(s)
      植村哲也,原田雅亘,秋保貴史,松田健一,山本眞史
    • Organizer
      2011年(平成23年)春季第58回応用物理学関係連合講演会
    • Place of Presentation
      神奈川工科大学(厚木市)
    • Year and Date
      2011-03-24
  • [Presentation] High tunnel magnetoresistance in fully epitaxial CoFe-buffered Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions2011

    • Author(s)
      H.-x. Liu, T.Taira, K.-i.Matsuda, T.Uemura, M.Yamamoto
    • Organizer
      4th International Symposium on Global COE Program of Center for Next-Generation Information Technology Based on Knowledge Discovery and Knowledge Federation.
    • Place of Presentation
      Hokkaido University Sapporo, Japan
    • Year and Date
      2011-01-18
  • [Presentation] Spin-dependent transport properties of Co_2MnSi/MgO/n-GaAs tunnel junctions2011

    • Author(s)
      G.-f.Li, T.Taira, K.-i.Matsuda, T.Uemura, M.Yamamoto
    • Organizer
      4th International Symposium on Global COE Program of Center for Next-Generation Information Technology Based on Knowledge Discovery and Knowledge Federation.
    • Place of Presentation
      Hokkaido University, Sapporo, Japan
    • Year and Date
      2011-01-18
  • [Presentation] Co2MnSi薄膜を用いた強磁性トンネル接合におけるスピン依存トンネル抵抗のMgOバリア膜厚依存性2011

    • Author(s)
      平田進之佑,李桂芳,本田佑輔,松田健一,植村哲也,山本眞史
    • Organizer
      2011年(平成23年)第46回応用物理学会北海道支部学術講演会
    • Place of Presentation
      室蘭工業大学(室蘭市)
    • Year and Date
      2011-01-07
  • [Presentation] 強磁性体/n-GaAsヘテロ接合におけるトンネル特性のMgO層挿入効果2011

    • Author(s)
      原田雅亘,秋保貴史,植村哲也,松田健一,山本眞史
    • Organizer
      2011年(平成23年)第46回応用物理学会北海道支部学術講演会
    • Place of Presentation
      室蘭工業大学(室蘭市)
    • Year and Date
      2011-01-07
  • [Remarks]

    • URL

      http://nsed.ist.hokudai.ac.jp/contents/article/article.html

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Published: 2014-08-29  

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