Study on spin dependent transport in ferromagnet/semiconductor heterostructures

• Project/Area Number: 19560307
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Hokkaido University
• Principal Investigator: UEMURA Tetsuya Hokkaido University, 大学院・情報科学研究科, 准教授 (20344476)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: スピンエレクトロニクス / スピン注入 / 強磁性体 / 半導体 / Co系ホイスラー合金 / GaAs / スピンLED / トンネリング異方性磁気抵抗 / MgO

Research Abstract

半導体中の伝導電子のスピンを操作し、これまでにない新しい機能を有する電子/光デバイスの研究が盛んに行われている。その実現の第一歩は、スピン偏極した電子を半導体内に発生させることであり、強磁性電極から半導体にスピン偏極した電子を電気的に注入する方法(スピン注入)が有効である。本研究では、高効率スピン注入の実現に向け、スピン偏極率の高いハーフメタル材料であるCo系ホイスラー合金薄膜を半導体GaAs上に高品質に形成するとともに、ホイスラー合金/GaAsヘテロ接合構造におけるスピン依存伝導特性を明らかにした。このことにより、将来の新しいスピン機能デバイスの創出にむけた基盤技術を確立した。

Research Products

• [Journal Article] Tunneling anisotropic magnetoresistance in epitaxial CoFe/n-GaAs junctions (2009)
  • Author(s): T. Uemura, Y. Imai, M. Harada, K.-i. Matsuda, and M. Yamamoto
  • Journal Title: Appl Phys. Lett vol.94
  • Peer Reviewed
• [Journal Article] Transport properties of Nb/PdNi bilayers and Nb/PdNi/Nb Josephson junctions (2009)
  • Author(s): K. -i. Matsuda, Y. Akimoto, T. Uemura and M. Yamamoto
  • Journal Title: J. Physics : Conference Series vol.150
  • Peer Reviewed
• [Journal Article] Spin-dependent tunnelling characteristics of fully epitaxial magnetic tunnel junctions with a Heusler alloy Co_2MnGe thin film and a MgO barrier (2009)
  • Author(s): T. Taira, T. Ishikawa, N. Itabashi, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Journal Title: J. Phys. D. vol.42
  • Peer Reviewed
• [Journal Article] Hard X-ray photoelectron spectroscopy of buried Heusler compounds (2009)
  • Author(s): S. Ouardi, B. Balke, A. Gloskovskii, G. H Fecher, C. Felser, G. Schoenhense, T. Ishikawa, T. Uemura, M. Yamamoto, H. Sukegawa, W.-H Wang, K. Inomata, Y. Yamashita, H. Yoshikawa, S. Ueda and K. Kobayashi
  • Journal Title: J. Phys. D vol.42
  • Peer Reviewed
• [Journal Article] Half-metallic electronic structure of Co_2MnSi electrodes in fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions proved by tunneling spectroscopy (2009)
  • Author(s): T. Ishikawa, N. Itabashi, T. Taira, K.-. Matsuda, T. Uemura, and M. Yamamoto
  • Journal Title: J. Appl. Phys vol.105
  • Peer Reviewed
• [Journal Article] Critical role of interface states for spin-dependent tunneling in half-metallic Co_2MnSi-based magnetic tunnel junctions investigated by tunneling spectroscopy (2009)
  • Author(s): T. Ishikawa, N. Itabashi, T. Taira, K.-. Matsuda, T. Uemura, and M. Yamamoto
  • Journal Title: Appl. Phys. Lett vol.94
  • Peer Reviewed
• [Journal Article] Influence of annealing on spin-dependent tunneling characteristics of fully epitaxial Co_2MnGe/MgO/Co_<50>Fe_<50> magnetic tunnel junctions (2009)
  • Author(s): T. Taira, T. Ishikawa, N. Itabashi, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Journal Title: Appl. Phys. Lett vol.94
  • Peer Reviewed
• [Journal Article] Transport properties of Nb/PdNi bilayers and Nb/PdNi/Nb Josephson junctions (2009)
  • Author(s): K.-i. Matsuda
  • Journal Title: J. Physics : Conference Series 150
  • Peer Reviewed
• [Journal Article] Spin-dependent tunnelling characteristics of fully epitaxial magnetic tunnel junctions with a Heusler alloy Co2MnGe thin film and a MgO barrier (2009)
  • Author(s): T. Taira
  • Journal Title: J. Phys. D 42
  • Peer Reviewed
• [Journal Article] Hard X-ray photoelectron spectroscopy of buried Heusler compounds (2009)
  • Author(s): S. Ouardi
  • Journal Title: J. Phys. D 42
  • Peer Reviewed
• [Journal Article] Half-metallic electronic structure of Co_2MnSi electrodes in fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions proved by tunneling spectroscopy (2009)
  • Author(s): T. Ishikawa
  • Journal Title: J. Appl. Phys 105
  • Peer Reviewed
• [Journal Article] Critical role of interface states for spin-dependent tunneling in half-metallic Co_2MnSi-based magnetic tunnel junctions investigated by tunneling spectroscopy (2009)
  • Author(s): T. Ishikawa
  • Journal Title: Appl. Phys. Lett 94
  • Peer Reviewed
• [Journal Article] Influence of annealing on spin-dependent tunneling characteristics of fully epitaxial Co2MnGe/MgO/Co50Fe50 magnetic tunnel junctions (2009)
  • Author(s): T. Taira
  • Journal Title: Appl. Phys. Lett 94
  • Peer Reviewed
• [Journal Article] Three-valued Magnetic Tunnel Junction for Non-volatile Ternary Content Addressable Memory Application (2008)
  • Author(s): T. Uemura and M. Yamamoto
  • Journal Title: J. Appl. Phys vol.104
  • Peer Reviewed
• [Journal Article] Fabrication and Characterization of Fully Epitaxial Magnetic Tunnel Junction Field Sensors using a Co_2MnSi Thin Film (2008)
  • Author(s): M. Masuda, T. Uemura, K.-i. Matsuda and M. Yamamoto
  • Journal Title: IEEE Transactions on Magnetics vol.44 Pages: 3996-3998
  • Peer Reviewed
• [Journal Article] Epitaxial growth and characterization of Co_2MnSi thin films on GaAs with MgO interlayer (2008)
  • Author(s): T. Uemura, Y. Imai, S. Kawagishi, K.-i. Matsuda, and M. Yamamoto
  • Journal Title: Physica E: Low-dimensional Systems and Nanostructures vol.40 Pages: 2025-2027
  • Peer Reviewed
• [Journal Article] Fabrication of fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions (2008)
  • Author(s): T. Ishikawa, S. Hakamata, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Journal Title: J. Appl. Phys vol.103
  • Peer Reviewed
• [Journal Article] Electronic and magnetic properties of Heusler alloy Co_2MnSi epitaxial ultrathin films facing a MgO barrier studied by X-ray magnetic circular dichroism (2008)
  • Author(s): T. Saito, T. Katayama, A. Emura, N. Sumida, N. Matsuoka, T. Ishikawa, T Uemura, M. Yamamoto, D. Asakura, and T. Koide
  • Journal Title: J. Appl. Phys vol.103
  • Peer Reviewed
• [Journal Article] Magnetic and transport properties of superconductor/ferromagnetic bilayer microbridges (2008)
  • Author(s): K.-i. Matsuda, Y. Akimoto, T. Uemura, and M. Yamamoto
  • Journal Title: J. Appl. Phys vol.103
  • Peer Reviewed
• [Journal Article] Structural, magnetic and electrical properties of Co2MnSi/MgO/n-GaAs tunnel junction (2008)
  • Author(s): S. Kawagishi, T. Uemura, Y. Imai, K.-i. Matsuda, and M. Yamamoto
  • Journal Title: J. Appl. Phys vol.103
  • Peer Reviewed
• [Journal Article] Three-valued Magnetic Tunnel Junction for Non-volatile Ternary Content Addressable Memory Application (2008)
  • Author(s): T. Uemura
  • Journal Title: J. Appl. Phys 140
  • Peer Reviewed
• [Journal Article] Fabrication and Characterization of Fully Epitaxial Magnetic Tunnel Junction Field Sensors using a Co2MnSi Thin Film (2008)
  • Author(s): M. Masuda
  • Journal Title: IEEE Transactions on Magnetics 44 Pages: 3996-3998
  • Peer Reviewed
• [Journal Article] Epitaxial growth and characterization of Co2MnSi thin films on GaAs with MgO interlayer (2008)
  • Author(s): T. Uemura
  • Journal Title: Physica E : Low-dimensional Systems and Nanostructures 103 Pages: 2025-2027
  • Peer Reviewed
• [Journal Article] Fabrication of fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions (2008)
  • Author(s): T. Ishikawa
  • Journal Title: J. Appl. Phys 103
  • Peer Reviewed
• [Journal Article] Electronic and magnetic properties of Heusler alloy Co_2MnSi epitaxial ultrathin films facing a MgO barrier studied by X-ray magnetic circular dichroism (2008)
  • Author(s): T. Saito
  • Journal Title: J. Appl. Phys 103
  • Peer Reviewed
• [Journal Article] Magnetic and transport properties of superconductor/ferromagnetic bilayer microbridges (2008)
  • Author(s): K.-i. Matsuda
  • Journal Title: J. Appl. Phys 103
  • Peer Reviewed
• [Journal Article] Structural, magnetic and electrical properties of Co2MnSi/MgO/n-GaAs tunnel junction (2008)
  • Author(s): S. Kawagishi
  • Journal Title: J. Appl. Phys 103
  • Peer Reviewed
• [Journal Article] Electronic and magnetic properties of Heusler alloy Co_2MnSi Epitaxial ultrathin films facing a MgO barrier studied by X-ray magnetic circular dichroism (2008)
  • Author(s): T. Saito
  • Journal Title: J. Appl. Phys. 103
  • Peer Reviewed
• [Journal Article] Magnetic and transport properties of superconductor/ferromagnet bilayer microbridges (2008)
  • Author(s): K.-i. Matsuda
  • Journal Title: J. Appl. Phys. 103
  • Peer Reviewed
• [Journal Article] Structural, magnetic and electrical properties of Co_2MnSi/MgO/n-GaAs tunnel junction (2008)
  • Author(s): S. Kawagishi
  • Journal Title: J. Appl. Phys. 103
  • Peer Reviewed
• [Journal Article] Structural and magnetic properties of Co_2Cr_<0.6>Fe_<0.4>Al thin films epitaxially grown on GaAs substrate with MgO interlayer (2007)
  • Author(s): T. Uemura, T. Yano, K.-i. Matsuda, and M. Yamamoto
  • Journal Title: Thin Solid Films vol.515 Pages: 8013-8016
  • Peer Reviewed
• [Journal Article] Fabrication of Epitaxial Magnetic Tunnel Junctions with a Co_2Cr^<0.6>Fe^<0.4>Al Thin Film and Their Tunnel Magnetoresistance Characteristics (2007)
  • Author(s): T. Marukame, T. Ishikawa, S. Hakamata, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Journal Title: J. Magn. Soc. Jpn vol.31 Pages: 344-350
  • Peer Reviewed
• [Journal Article] Four-state Magnetoresistance in Epitaxial CoFe-based Magnetic Tunnel Junction (2007)
  • Author(s): T. Uemura, T. Marukame, K.-i. Matsuda, and M.Yamamoto
  • Journal Title: IEEE Trans. on Magn vol.43 Pages: 2791-2793
  • Peer Reviewed
• [Journal Article] Magnetic and Transport Properties of Nb/PdNi Bilayers (2007)
  • Author(s): K.-i. Matsuda, H. Niwa, Y. Akimoto, T. Uemura, and M. Yamamoto
  • Journal Title: IEEE Trans. on Appl. Supercond vol.17 Pages: 3529-3532
  • Peer Reviewed
• [Journal Article] Improved tunnel magnetoresistance characteristics of magnetic tunnel junctions with a Heusler alloy thin film of Co2MnGe and a MgO tunnel barrier (2007)
  • Author(s): S. Hakamata, T. Ishikawa, T. Marukame, K.-i. Matsuda, T. Uemura, M. Arita, and M. Yamamoto
  • Journal Title: J. Appl. Phys vol.101
  • Peer Reviewed
• [Journal Article] Structural and magnetic properties of Co_2Cr_<0.6>Fe_<0.4>Al thin films epitaxially grown on GaAs substrate with MgO interlayer (2007)
  • Author(s): T. Uemura
  • Journal Title: Thin Solid Films 515 Pages: 8013-8016
  • Peer Reviewed
• [Journal Article] Fabrication of Epitaxial Magnetic Tunnel Junctions with a Co_2Cr_<0.6>Fe_<0.4>Al Thin Film and Their Tunnel MagnetoresistanceCharacteristics (2007)
  • Author(s): T. Marukame
  • Journal Title: J. Magn. Soc. Jpn. 31 Pages: 344-350
  • Peer Reviewed
• [Journal Article] Four-state magnetoresistance in Epitaxial CoFe-based Magnetic Tunnel Junction (2007)
  • Author(s): T.Uemura
  • Journal Title: IEEE Trans. on Magn. 43 Pages: 2791-2793
  • Peer Reviewed
• [Journal Article] Fabrication of Fully Epitaxial Co_2Cr_<0.6>Fe_<0.4>Al/MgO/Co_2Cr_<0.6>Fe_<0.4>Al Magnetic Tunnel Junctions (2007)
  • Author(s): T. Marukame
  • Journal Title: IEEE Trans. on Magn. 43 Pages: 2782-2784
  • Peer Reviewed
• [Journal Article] Magnetic and Transport Properties of Nb/PdNi Bilayers (2007)
  • Author(s): K.-i. Matsuda
  • Journal Title: IEEE Trans. on Appl. Supercond. 17 Pages: 3529-3532
  • Peer Reviewed
• [Journal Article] Improved tunnel magnetoresistance characteristics of magnetic tunnel junctions with a Heusler alloy thin film of Co_2MnGe and a MgO tunnelbarrier (2007)
  • Author(s): S. Hakamata
  • Journal Title: J. Appl. Phys. 101
  • Peer Reviewed
• [Journal Article] Tunnel magnetoresistance in fully epitaxial magnetic tunnel junctions with a full-Heusler alloy thin film of Co_2Cr_<0.6>Fe_<0.4>Al and a MgO tunnel barrier (2007)
  • Author(s): T. Marukame
  • Journal Title: J. Appl. Phys. 101
  • Peer Reviewed
• [Journal Article] Tunneling Magnetoreistance Simulation Used to Detect Domain-wall Structures and Their Motion in a Ferromagnetic Wire
  • Author(s): K. Sawada, T. Uemura, M. Masuda, K.-i. Matsuda, and M. Yamamoto
  • Journal Title: IEEE Trans. on Magnetics (in press)
  • Peer Reviewed
• [Journal Article] Advances 105-116
  • Author(s): M. Yamamoto
  • Journal Title: Advances in Solid State Physics, vol. 47, Springer 008
• [Presentation] 強磁性細線中を伝搬する磁壁の構造および運動のTMR検出のシミュレーション (2009)
  • Author(s): 澤田圭佑
  • Organizer: 2009年(平成21年)春季第56回応用物理学会関係連合講演会
  • Place of Presentation: つくば市、筑波大学
  • Year and Date: 2009-03-31
• [Presentation] エピタキシャルCoFe/n-GaAs接合における磁気抵抗特性 (2009)
  • Author(s): 今井洋介
  • Organizer: The 13^<th> Symposiumu on the Physics and Application of Spin-Related Phenomena in Semiconductors (PASPS13)
  • Place of Presentation: 仙台市、東北大学
  • Year and Date: 2009-01-28
• [Presentation] CoFe/n-GaAs/CoFe横型接合における磁気抵抗特性 (2009)
  • Author(s): 今井洋介
  • Organizer: 2009年(平成21年)第44回応用物理学会北海道支部学術講演会
  • Place of Presentation: 函館市、サン・リフレ函館
  • Year and Date: 2009-01-19
• [Presentation] Co_2Cr_<0.6>Fe_<0.4>Al/MgO/Co_<50>Fe_<50>強磁性トンネル接合のコンダクタンス特性に対するアニールの影響 (2009)
  • Author(s): 米村和希
  • Organizer: 2009年(平成21年)第44回応用物理学会北海道支部学術講演会
  • Place of Presentation: 函館市、サン・リフレ函館
  • Year and Date: 2009-01-09
• [Presentation] Co_2Cr_<0.6>Fe_<0.4>Al/MgO/Co_2Cr_<0.6>Fe_<0.4>Al強磁性トンネル接合のスピン依存コンダクタンス特性 (2009)
  • Author(s): 板橋直樹
  • Organizer: 2009年(平成21年)第44回応用物理学会北海道支部学術講演会
  • Place of Presentation: 函館市、サシ・リフレ函館
  • Year and Date: 2009-01-09
• [Presentation] ホイスラー合金薄膜を上部フリー層に用いた微細MTJの作製と評価 (2009)
  • Author(s): 増田昌洋
  • Organizer: 2009年(平成21年)第44回応用物理学会北海道支部学術講演会
  • Place of Presentation: 函館市、サン・リフレ函館
  • Year and Date: 2009-01-09
• [Presentation] Co_2MnSi細線電極における磁壁構造に依存したトンネル磁気抵抗のシミュレーション (2009)
  • Author(s): 澤田圭佑
  • Organizer: 2009年(平成21年)第44回応用物理学会北海道支部学術講演会
  • Place of Presentation: 函館市、サン・リフレ函館
  • Year and Date: 2009-01-09
• [Presentation] ハーフメタル系強磁性体(Co_2Cr_<0.6>Fe_<0.4>Al)/超伝導体(NbN)二層薄膜のエピタキシャル成長 (2009)
  • Author(s): 今井悟嗣
  • Organizer: 2009年(平成21年)第44回応用物理学会北海道支部学術講演会
  • Place of Presentation: 函館市・サン・リフレ函館
  • Year and Date: 2009-01-09
• [Presentation] Tunneling Anisotropic Magneto-resistance in an Epitaxial CoFe/n-GaAs Junction (2009)
  • Author(s): T. Uemura, Y. Imai, M. Harada, K.-i. Matsuda, and M. Yamamoto
  • Organizer: IEEE International Magnetics Conference 2009
  • Place of Presentation: Sacramento, CA, USA(BQ-13)
• [Presentation] Simulation of tunneling magnetoresistance used to detect domain-wall structure and motion in a ferromagnetic wire (2009)
  • Author(s): K. Sawada, T. Uemura, M. Masuda, K.-i.Matsuda, and M. Yamamoto
  • Organizer: IEEE International Magnetics Conference 2009
  • Place of Presentation: Sacramento, CA, USA(BD-07)
• [Presentation] Tunneling spectroscopy of fully epitaxial Co2MnSi/MgO/Co2MnSi magnetic tunnel junctions (2008)
  • Author(s): T. Ishikawa
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2008-12-03
• [Presentation] Spin-polarized tunneling in fully epitaxial magnetic tunnel junctions with Heusler alloy thin films and a MgO barrier (2008)
  • Author(s): M. Yamamoto
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2008-12-03
• [Presentation] Tunnel magnetoresistance characteristics of post-deposition-annealed Co2MnGe/MgO/CoFe tunnel junctions (2008)
  • Author(s): T. Taira
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2008-12-03
• [Presentation] Tunnel magnetoresistance characteristics of post-deposition-annealed Co_2MnGe/MgO/CoFe tunnel junctions (2008)
  • Author(s): T. Taira, T. Ishikawa, K.-i. Matsuda, T. Uemura and M. Yamamoto
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA(L2.1)
  • Year and Date: 2008-12-02
• [Presentation] Tunneling conductance characteristics for Co2Cr0.6Fe0.4Al/MgO/Co2Cr0.6Fe0.4Al magnetic tunnel junctions (2008)
  • Author(s): N. Itabashi
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA
  • Year and Date: 2008-12-02
• [Presentation] Spin-dependent electronic structures of Co2Cr0.6Fe0.4Al electrodes investigated through tunneling spectroscopy (2008)
  • Author(s): N. Itabashi
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA
  • Year and Date: 2008-11-14
• [Presentation] Tunneling spectroscopy of Co_2Cr_<0.6>Fe_<0.4>Al/MgO/CoFe magnetic tunnel junctions (2008)
  • Author(s): K. Yonemura
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA
  • Year and Date: 2008-11-13
• [Presentation] pin-dependent tunneling characteristics of Co2MnGe/MgO/CoFe tunnel junctions (2008)
  • Author(s): T. Taira
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA
  • Year and Date: 2008-11-12
• [Presentation] Half-metallic electronic structure of Co_2MnSi electrodes proved by tunneling spectroscopy (2008)
  • Author(s): T. Ishikawa
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin. TX. USA
  • Year and Date: 2008-11-12
• [Presentation] Fabrication of fully epitaxial magnetic tunnel junctions with half-metallic Heusler alloy thin films and a MgO tunnel barrier (2008)
  • Author(s): M. Yamamoto
  • Organizer: The 10^<th> Int'l Joint Symposium between Hokkaido University and Chungnam National University
  • Place of Presentation: 札幌
  • Year and Date: 2008-10-23
• [Presentation] Co_2Cr_<0.6>Fe_<0.4>Al/MgO/Co_2Cr_<0.6>Fe_<0.4>Al強磁性トンネル接合のスピン依存トンネルスペクトロスコピー (2008)
  • Author(s): 板橋直樹
  • Organizer: 第32回日本磁気学会学術講演会
  • Place of Presentation: 多賀城市東北学院大学
  • Year and Date: 2008-09-14
• [Presentation] Co_2MnGe/MgO/Co_<50>Fe_<50>強磁性トンネル接合のトンネル磁気抵抗特性の改善 (2008)
  • Author(s): 平智幸
  • Organizer: 第32回日本磁気学会学術講演会
  • Place of Presentation: 多賀城市東北学院大学
  • Year and Date: 2008-09-13
• [Presentation] Co2MnSi電極を用いた強磁性トンネル接合におけるスピン依存コンダクタンス特性 (2008)
  • Author(s): 石川貴之
  • Organizer: 第32回日本磁気学会学術講演会
  • Place of Presentation: 多賀城市東北学院大学
  • Year and Date: 2008-09-13
• [Presentation] Co_2MnGe/MgO/Co_<50>Fe_<50>強磁性トンネル接合のコンダクタンス特性 (2008)
  • Author(s): 平智幸
  • Organizer: 2008年(平成20年)秋季第69回応用物理学会学術講演会
  • Place of Presentation: 春日井市、中部大学
  • Year and Date: 2008-09-05
• [Presentation] Nb/PdNi二層膜およびNb/PdNi/Nbジョセフソン接合の電気伝導特性 (2008)
  • Author(s): 松田健一
  • Organizer: 2008年(平成20年)秋季第69回応用物理学会学術講演会
  • Place of Presentation: 春日井市、中部大学
  • Year and Date: 2008-09-05
• [Presentation] Co_2MnSi/MgO/Co_2MnSi MTJのスピン依存トンネル特性に対するアニール効果 (2008)
  • Author(s): 石川貴之
  • Organizer: 2008年(平成20年)秋季第69回応用物理学会学術講演会
  • Place of Presentation: 春日井市、中部大学
  • Year and Date: 2008-09-04
• [Presentation] Co_2Cr_0.6Fe_0.4Al/MgO/Co_50Fe_50強磁性トンネル接合のスピン依存トンネル特性 (2008)
  • Author(s): 米村和希
  • Organizer: 2008年(平成20年)秋季第69回応用物理学会学術講演会
  • Place of Presentation: 春日井市、中部大学
  • Year and Date: 2008-09-04
• [Presentation] Spin-dependent tunneling spectroscopy of fully epitaxial magnetic tunnel junc-tions with Heusler alloy Co_2Cr_<0.6>Fe_<0.4>Al electrodes and a MgO barrier (2008)
  • Author(s): N. Itabashi
  • Organizer: 25^<th> Int'l Conf. on Low Temp. Physics
  • Place of Presentation: Amsterdam, The Netherlands
  • Year and Date: 2008-08-11
• [Presentation] Transport Properties of Nb/PdNi bilayers and Nb/PdNi/Nb Josephson junctions (2008)
  • Author(s): K.-i. Matsuda
  • Organizer: 25^<th> Int'l Conf. on Low Temp. Physics
  • Place of Presentation: Amsterdam, The Netherlands
  • Year and Date: 2008-08-07
• [Presentation] ハーフメタル系ホイスラー合金を用いた強磁性トンネル接合デバイス (2008)
  • Author(s): 山本眞史
  • Organizer: 日本学術振興会薄膜第131委員会
  • Place of Presentation: 釧路市
  • Year and Date: 2008-06-27
• [Presentation] Spin-dependent tunneling conductance in fully epitaxial Co2MnSi/MgO/Co_2MnsI tunnel junctions (2008)
  • Author(s): T. Ishikawa
  • Organizer: IEEE Int'l Magnetics Conf. Europe 2008
  • Place of Presentation: Madrid, Spain
  • Year and Date: 2008-05-05
• [Presentation] Fabrication and characterization of magnetic tunnel junction field sensors with a Co_2MnSi thin film (2008)
  • Author(s): M. Masuda
  • Organizer: IEEE Int'l Magnetics Conf. Europe 2008
  • Place of Presentation: Madrid, Spain
  • Year and Date: 2008-05-05
• [Presentation] エピタキシャル強磁性トンネル接合におけるCo_2MnSi電極のハーフメタル特性 (2008)
  • Author(s): 石川貴之
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋市、日本大学船橋キャンパス
  • Year and Date: 2008-03-29
• [Presentation] Co_2MnSi/MgO/Co_2MnSi強磁性トンネル接合のコンダクタンス特性 (2008)
  • Author(s): 板橋直樹
  • Organizer: 第55回応用物理学関係連合講演会
  • Place of Presentation: 船橋市、日本大学船橋キャンパス
  • Year and Date: 2008-03-29
• [Presentation] Heusler alloy-based fully epitaxial magnetic tunnel junctions with a MgO barrier (2008)
  • Author(s): M. Yamamoto
  • Organizer: 2008 RCIQE Int'1 Seminar on "Advanced Semiconductor Materials and Devices"
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-03-04
• [Presentation] エピタキシャルCo_2MnSi/MgO/n-GaAsトンネル接合の特性評価 (2008)
  • Author(s): 河岸沙織
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] Co_2MnSi/MgO/Co_2MnSiエピタキシャル強磁性トンネル接合のトンネル磁気抵抗特性 (2008)
  • Author(s): 石川貴之
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] ホイスラー合金Co_2MnZ(Z=Si,Ge)薄膜を用いた強磁性トンネル接合におけるトンネル磁気抵抗特性の薄膜組成依存性 (2008)
  • Author(s): 袴田真矢
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] CoFe/MgO/CoFe強磁性トンネル接合におけるトンネル磁気抵抗のMgOバリア膜厚依存性 (2008)
  • Author(s): 平智幸
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] Co_2MnSi/MgO強磁性トンネル接合のスピン依存トンネル抵抗のバイアス電圧依存性 (2008)
  • Author(s): 板橋直樹
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] Co_2Cr_<0.6>Fe_<0.4>Al/MgO/Co_<50>Fe_<50>強磁性トンネル接合のスピン依存トンネル抵抗のMgOバリア膜厚に対する振動的依存性 (2008)
  • Author(s): 米村和希
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] ホイスラー合金Co_2MnSi薄膜を用いた強磁性トンネル接合型磁気センサーの製作と評価 (2008)
  • Author(s): 増田昌洋
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] GaAs上に成長したCo_2MnSi薄膜の構造および磁気特性に対するMgO層挿入の効果 (2008)
  • Author(s): 今井洋介
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-11
• [Presentation] Nb/強磁性体PdNi/Nbジョセフソン接合の電流-電圧特性の温度依存性および強磁性膜厚依存性 (2008)
  • Author(s): 秋元陽介
  • Organizer: 第43回応用物理学会北海道支部学術講演会
  • Place of Presentation: 札幌市、北海道大学
  • Year and Date: 2008-01-10
• [Presentation] Tunneling spectroscopy of fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions (2008)
  • Author(s): T. Ishikawa, N. Itabashi, T. Taira, K.-i. Matsuda, T. Uemura and M. Yamamoto
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA(L5.1)
• [Presentation] Tunneling conductance characteristics for Co_2Cr_<0.6>_Fe_<0.4>Al/MgO/Co_2Cr_<0.6>Fe_<0.4>Al magnetic tunnel junctions (2008)
  • Author(s): N. Itabashi, T. Ishikawa, K. Yonemura, K.-i. Matsuda, T. Uemura and M. Yamamoto
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA(L2.10)
• [Presentation] Spin-polarized tunneling in fully epitaxial magnetic tunnel junctions with Heusler alloy thin films and a MgO barrier (2008)
  • Author(s): M. Yamamoto, T. Ishikawa, K.-i. Matsuda, and T. Uemura
  • Organizer: 2008 Material Research Society (MRS) Fall Meeting
  • Place of Presentation: Boston, MA, USA(L2.6)[Invited Talk]
• [Presentation] Spin-dependent electronic structures of Co_2Cr_<0.6>Fe_<0.4>Al electrodes investigated through tunneling spectroscopy (2008)
  • Author(s): N. Itabashi, T. Ishikawa, K. Yonemura, K.-i. Matsuda, T. Uemura and M. Yamamoto
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA(GT-03)
• [Presentation] Tunneling spectroscopy of Co_2Cr_<0.6>Fe_<0.4>Al/MgO/CoFe magnetic tunnel junctions (2008)
  • Author(s): K. Yonemura, T. Ishikawa, N. Itabashi, K.-i. Matsuda, T. Uemura and M. Yamamoto
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA(ED-07)
• [Presentation] Spin-dependent tunneling characteristics of Co_2MnGe/MgO/CoFe tunnel junctions (2008)
  • Author(s): T. Taira, T. Ishikawa, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Organizer: 53rd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA(DD-02)
• [Presentation] Half-metallic electronic structure of Co_2MnSi electrodes proved by tunneling spectroscopy (2008)
  • Author(s): T. Ishikawa, N. Itabashi, T. Taira, K.-i. Matsuda, T. Uemura and M. Yamamoto
  • Organizer: 53^<rd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Austin, TX, USA(DD-07)[Invited Talk]
• [Presentation] Fabrication of fully epitaxial magnetic tunnel junctions with half-metallic Heusler alloy thin films and a MgO tunnel barrier (2008)
  • Author(s): M. Yamamoto, T. Uemura, and K.i. Matusda
  • Organizer: The 10^<th> Int'l Joint Symposium between Hokkaido University and Chungnam National University, Sapporo
  • Place of Presentation: Hokkaido University and Chungnam National University[Invited Talk]
• [Presentation] Sp-in-dependent tunneling spectroscopy of fully epitaxial magnetic tunnel junctions with Heusler alloy Co_2Cr_<0:6>Fe_<0:4>Al electrodes and a MgO barrier (2008)
  • Author(s): N. Itabashi, T. Ishikawa, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Organizer: 25^<th> Int'l Conf. on Low Temp. Physics
  • Place of Presentation: Amsterdam, The Netherlands(PD-Mo244)
• [Presentation] Transport Properties of Nb/PdNi bilayers and Nb/PdNi/Nb Josephson junctions (2008)
  • Author(s): K.-i. Matsuda, Y. Akimoto, T. Uemura, and M. Yamamoto
  • Organizer: 25^<th> Int'l Conf. on Low Temp. Physics
  • Place of Presentation: Amsterdam, The Netherlands(PB-Th118)
• [Presentation] Spin-dependent tunneling conductance in fully epitaxial Co_2MnSi/MgO/Co_2MnsI tunnel junctions (2008)
  • Author(s): T. Ishikawa, N. Itabashi, K. Matsuda, T. Uemura, and M. Yamamoto
  • Organizer: IEEE Int'l Magnetics Conf. Europe 2008
  • Place of Presentation: Madrid, Spain(AC-07)
• [Presentation] Fabrication and characterization of magnetic tunnel junction field sensors with a Co_2MnSi thin film (2008)
  • Author(s): M. Masuda, T. Uemura, K.-i. Matsuda and M. Yamamoto
  • Organizer: IEEE Int'l Magnetics Conf
  • Place of Presentation: Europe 2008(BD-04)
• [Presentation] Heusler alloy-based fully epitaxial magnetic tunnel junctions with a MgO barrier (2008)
  • Author(s): M. Yamamoto, T. Uemura, and K.-i. Matsuda
  • Organizer: 2008 RCIQE Int'l Seminar on "Advanced Semiconductor Materials and Devices"
  • Place of Presentation: Sapporo, Japan[Invited Talk]
• [Presentation] GaAs上にMgO層を介して成長したCo_2MnSi薄膜の特性評価 (2007)
  • Author(s): 今井洋介
  • Organizer: The 12th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors(PASPS-12)
  • Place of Presentation: 吹田市、大阪大学
  • Year and Date: 2007-12-21
• [Presentation] Magnetic and transport properties of superconductor/ferromagnet bilayer microbridges (2007)
  • Author(s): K.-i. Matsuda
  • Organizer: The 52nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
  • Year and Date: 2007-11-09
• [Presentation] Highly spin-polarized tunneling in Heusler alloy-based fully epitaxial magnetic tunnel junctions with a MgO tunnel barrier (2007)
  • Author(s): M. Yamamoto
  • Organizer: The 52nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
  • Year and Date: 2007-11-07
• [Presentation] Oscillations in tunneling resistance as a function of MgO barrier thickness in fully epitaxial magnetic tunnel junctions of Co_2Cr^<0.6>Fe^<0.4>Al/MgO/Co^<50>Fe^<50> (2007)
  • Author(s): M. Yamamoto, T. Marukame, T. Ishikawa, K. Matsuda, and T. Uemura
  • Organizer: 52^nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA(AB-11)
  • Year and Date: 2007-11-06
• [Presentation] Oscillations in tunneling resistance as a function of MgO barrier thickness in fully epitaxial magnetic tunnel junctions of Co_2Cr_<0.6>Fe_<0.4>Al/MgO/Co_<50>Fe_<50> (2007)
  • Author(s): M. Yamamoto
  • Organizer: The 52nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
  • Year and Date: 2007-11-06
• [Presentation] Spin-dependent tunneling in fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions (2007)
  • Author(s): T. Ishikawa
  • Organizer: The 52nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
  • Year and Date: 2007-11-06
• [Presentation] Electronic and magneric properties of Heusler alloy Co_2MnSi epitaxial ultrathin films facing a MgO barrier investigated by X-ray magnetic circular dichroism (2007)
  • Author(s): T. Saito
  • Organizer: The 52nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
  • Year and Date: 2007-11-06
• [Presentation] Electrical characterization of epitaxial Co_2MnSi/MgO/n-GaAs tunnel junctions (2007)
  • Author(s): S. Kawagishi
  • Organizer: The 52nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
  • Year and Date: 2007-11-06
• [Presentation] ホイスラー合金/MgOエピタキシャルMTJにおけるスピン偏極トンネリング (2007)
  • Author(s): 石川貴之
  • Organizer: 日本応用磁気学会「スピンエレクトロニクス専門研究会」第17回研究会
  • Place of Presentation: 仙台市、東北大学
  • Year and Date: 2007-11-02
• [Presentation] Co_2MnZ(Z=Si, Ge)/MgO/Co_<50>Fe_<50>強磁性トンネル接合のTMR特性の薄膜組成依存性 (2007)
  • Author(s): 袴田真矢
  • Organizer: 第31回日本応用磁気学会学術講演会
  • Place of Presentation: 東京都豊島区、学習院大学
  • Year and Date: 2007-09-11
• [Presentation] Co_2MnSi/MgO/Co_2MnSi 強磁性トンネル接合の製作とトンネル磁気抵抗特性 (2007)
  • Author(s): 石川貴之
  • Organizer: 第31回日本応用磁気学会学術講演会
  • Place of Presentation: 東京都豊島区、学習院大学
  • Year and Date: 2007-09-11
• [Presentation] Co_2MnSi薄膜を用いた強磁性トンネル接合型磁気センサーの製作 (2007)
  • Author(s): 植村哲也
  • Organizer: 第31回日本応用磁気学会学術講演会
  • Place of Presentation: 東京都豊島区、学習院大学
  • Year and Date: 2007-09-11
• [Presentation] ホイスラー合金MTJにおけるスピン依存トンネル抵抗のMgOバリア膜厚に対する振動的依存性 (2007)
  • Author(s): 丸亀孝生
  • Organizer: 第31回日本応用磁気学会学術講演会
  • Place of Presentation: 東京都豊島区、学習院大学
  • Year and Date: 2007-09-11
• [Presentation] MgO障壁と界面を形成するホイスラー合金Co_2MnSiエピタキシャル極薄膜のXASおよびXMCD (2007)
  • Author(s): 斉藤敏明
  • Organizer: 第31回日本応用磁気学会学術講演会
  • Place of Presentation: 東京都豊島区、学習院大学
  • Year and Date: 2007-09-11
• [Presentation] GaAsMgO層を介して成長したCo_2MnSi薄膜の構造および磁気特性評価 (2007)
  • Author(s): 今井洋介
  • Organizer: 第68回応用物理学会学術講演会
  • Place of Presentation: 札幌市、北海道工業大学
  • Year and Date: 2007-09-05
• [Presentation] Co_2MnSi薄膜を上部フリー層に用いたエピタキシャルMTJの製作と評価 (2007)
  • Author(s): 増田昌洋
  • Organizer: 第68回応用物理学会学術講演会
  • Place of Presentation: 札幌市、北海道工業大学
  • Year and Date: 2007-09-05
• [Presentation] CoFe/MgO/CoFe強磁性トンネル接合におけるトンネル磁気抵抗のMgOバリア膜厚依存性 (2007)
  • Author(s): 平智幸
  • Organizer: 第68回応用物理学会学術講演会
  • Place of Presentation: 札幌市、北海道工業大学
  • Year and Date: 2007-09-05
• [Presentation] Epitaxial growth and characterization of Co_2MnSi thin films on GaAs with MgO interlayer (2007)
  • Author(s): T. Uemura
  • Organizer: The 13th Int' l Conf. on Modulated Semiconductor Structures
  • Place of Presentation: Genova, Italy
  • Year and Date: 2007-07-17
• [Presentation] Four-state Magnetic Random Access Memory and Ternary Content Addressable Memory using CoFe-based Magnetic Tunnel Junctions (2007)
  • Author(s): T. Uemura
  • Organizer: 37th Int' l Symposium om Multiple-Valued Logic
  • Place of Presentation: Oslo, Norway
  • Year and Date: 2007-05-15
• [Presentation] Highly spin-polarized tunneling in Heusler alloy-based fully epitaxial magnetic tunnel junctions with a MgO tunnel barrier (2007)
  • Author(s): M. Yamamoto, T. Marukame, T. Ishikawa, K. Matsuda, and T. Uemura
  • Organizer: 52^<nd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA(DB-01)[Invited Talk]
• [Presentation] Spin-dependent tunneling in fully epitaxial Co_2MnSi/MgO/Co_2MnSi magnetic tunnel junctions (2007)
  • Author(s): T. Ishikawa, S. Hakamata, K.-i. Matsuda, T. Uemura, and M. Yamamoto
  • Organizer: 52^nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA(AB-07)
• [Presentation] Electronic and magnetic properties of Heusler alloy Co_2MnSi epitaxial ultrathin films facing a MgO barrier investigated by X-ray magnetic circular dichroism (2007)
  • Author(s): T. Saito, T. Katayama, A. Emura, N. Sumida, N. Matsuoka, T. Ishikawa, T. Uemura, M. Yamamoto, D. Asakura, and T. Koide
  • Organizer: 52^nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA(BQ-06)
• [Presentation] Electrical characterization of epitaxial Co_2MnSi/MgO/n-GaAs tunnel junctions (2007)
  • Author(s): S. Kawagishi, T. Uemura, Y. Imai, K.-i. Matsuda, and M. Yamamoto
  • Organizer: 52^<nd> Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
• [Presentation] Magnetic and transport properties of superconductor/ferromagnet bilayer microbridges (2007)
  • Author(s): K.-i. Matsuda, Y. Akimoto, T. Uemura, and M. Yamamoto
  • Organizer: 52^nd Magnetism and Magnetic Materials Conference
  • Place of Presentation: Tampa, Florida, USA
• [Presentation] Epitaxial growth and characterization of Co_2MnSi thin films on GaAs with MgO interlayer (2007)
  • Author(s): T. Uemura, T. Yano, Y. Imai, K. Matsuda, and M. Yamamoto
  • Organizer: The 13^<th> Int'l Conf. on Modulated Semiconductor Structures
  • Place of Presentation: Genova, Italy
• [Presentation] Four-state Magnetic Random Access Memory and Ternary Content Addressable Memory using CoFe-based Magnetic Tunnel Junctions (2007)
  • Author(s): T. Uemura, T. Marukame, K.-i. Matsuda, and M. Yamamoto
  • Organizer: 37^<th> Int'l Symposium om Multiple-Valued Logic
  • Place of Presentation: Oslo, Norway
• [Book] Springer Berlin/Heidelberg, Advances in Solid State Physics 47, R. Haug (Ed.) (2008)
  • Author(s): M. Yamamoto, T. Marukame, T. Ishikawa, K.-i. Matsuda, and T. Uemura
  • Publisher: Highly Spin-Polarized Tunneling in Fully Epitaxial Magnetic Tunnel Junctions with a Co-Based Full-Heusler Alloy Thin Film and a MgO Barrier