Attempt of application of half-metal granular to spin transistor structure

• Project/Area Number: 22560308
• 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: Daido University
• Principal Investigator: JIMBO Mutsuko 大同大学, 工学部, 教授 (00115677)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 電気・電子材料(半導体) / 誘電体 / 磁性体 / 超誘電体 / 有機物 / 絶縁体 / 超伝導体 / スピントランジスタ / グラニュラー膜 / ハーフメタル / トンネル伝導 / スピンエレクトロニクス

Research Abstract

The granular films consisting of a ful-Heusler CFAS alloy and Al2O3 exhibited a large MR ratio of about 18% at room temperature. This value is the largest value ever reported for magnetic metal-insulator granular films. It was suggested that the large MR ratio was obtained owing to the existence of granules with L21 or B2 phases, which exhibit high spin polarization. This result showed the possibility of the application of the half-metal to the granular films.

Research Products

• [Journal Article] Large TunnelMagnetoresistance of Full-Heusler CoFeAlSiAlloy Granular Films (2011)
  • Author(s): Michiaki Kondo, Takuro Chino, YujiFujiwara, and Mutsuko Jimbo
  • Journal Title: Jpn. J. Appl. Phys Volume: 50 Issue: 12R Pages: 123001-123001
  • DOI: 10.1143/jjap.50.123001
  • Peer Reviewed
• [Journal Article] Magnetoresistance and electronic structure of granular films withMgO or MgF2 matrices (2011)
  • Author(s): Y. Fujiwara, H. Matsuda, K. Sato, M. Jimbo, T. Kobayashi
  • Journal Title: Journal of Physics: Conference Series Volume: 266
  • URL: http://iopscience.iop.org/1742-6596/266/1
  • Peer Reviewed
• [Journal Article] Magnetoresistance and electronic structure of granular films with MgO or MgF2 matrices (2011)
  • Author(s): Y.Fujiwara, H.Matsuda, K.Sato, M.Jimbo, T.Kobayashi
  • Journal Title: Journal of Physics : Conference Series Volume: 266 Pages: 012087-012087
  • DOI: 10.1088/1742-6596/266/1/012087
  • Peer Reviewed
• [Journal Article] CoFeAlSi合金を用いたグラニュラー薄膜の磁気抵抗効果 (2010)
  • Author(s): 佐藤和宣,藤原裕司,加藤剛志,神保睦子,小林正
  • Journal Title: 電気学会論文誌A Volume: 130 Pages: 626-630
  • URL: http://www2.iee.or.jp/ver2/honbu/27-publication/index101.html
  • Peer Reviewed
• [Journal Article] CoFeAlSi合金を用いたグラニュラー薄膜の磁気抵抗効果 (2010)
  • Author(s): 佐藤和宣, 藤原裕司, 加藤剛志, 神保睦子, 小林正
  • Journal Title: 電気学会論文誌A Volume: 130, No.7 Pages: 626-630
  • Peer Reviewed
• [Presentation] Tunneling magnetoresistance effect and structurof granular films using CoFeAlSi alloy (2012)
  • Author(s): M. Kondo, T. Chino, M. Hattori, Y. Urakawa, Y. Fujiwara, T. Kato, M. Jimbo
  • Organizer: International Conference of the Asian Union ofMagnetics Societies
  • Place of Presentation: 奈良県新公会堂
  • Year and Date: 2012-10-02
• [Presentation] Co2FeAl0.5Si0.5-MgF2グラニュラー薄膜の構造とトンネル磁気抵抗効果 (2011)
  • Author(s): 浦川依久,尾崎正太郎,藤原裕司,小原直人,前田浩二,加藤剛志,神保睦子,小林正
  • Organizer: 第35回日本磁気学会学術講演会
  • Place of Presentation: 新潟コンベンションセンター
  • Year and Date: 2011-09-27
• [Presentation] Tunnel Magnetoresistance of CoFeAlSi-AlO Granular Films (2011)
  • Author(s): M.Kondo, T.Chino, Y.Fujiwara, M.Jimbo
  • Organizer: Int. Magnetics Conference
  • Place of Presentation: Taipei Int. Convention Center,Taiwan
  • Year and Date: 2011-04-26
• [Presentation] Tunnel Magnetoresistance of CoFeAlSi-AlO Granular Films (2011)
  • Author(s): M.Kondo, T.Chino, Y.Fujiwara, M.Jimbo
  • Organizer: Int. Magnetics Conference
  • Place of Presentation: 台北(台湾)
• [Presentation] Co_2FeAl_<0.5>Si_<0.5>-MgF_2グラニュラー薄膜の構造とトンネル磁気抵抗効果 (2011)
  • Author(s): 浦川依久, 尾崎正太郎, 藤原裕司, 小原直人, 前田浩二, 加藤剛志, 神保睦子, 小林正
  • Organizer: 第35回日本磁気学会学術講演会
  • Place of Presentation: 新潟
• [Presentation] CoFeAlSi-Al2O3グラニュラー薄膜の磁気抵抗特性 (2010)
  • Author(s): 近藤孔明,地濃拓郎,藤原裕司,神保睦子
  • Organizer: 第34回日本磁気学会学術講演会
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2010-09-06
• [Presentation] Magnetoresistance of Co2FeAl0.5Si0.5-MgF2granular films (2010)
  • Author(s): Y.Fujiwara, S.Ozaki, Y.Urakawa, K.Sato, M.Kondo, M.Jimbo, T.Kato, T.Kobayashi
  • Organizer: The 2nd Int.Symposium on Advanced magnetic Materials and Applications (ISAMMA 2010)
  • Place of Presentation: 仙台国際センター
• [Presentation] Magnetoresistance and electronic of granular films with MgO or MgF2 matrices (2010)
  • Author(s): Y.Fujiwara, H.Matsuda, K.Sato, M.Jimbo, T.Kobayashi
  • Organizer: The 2nd Int.Symposium on Advanced magnetic Materials and Applications(ISAMMA 2010)
• [Presentation] CoFeAlSi-Al203グラニュラー薄膜の磁気抵抗特性 (2010)
  • Author(s): 近藤孔明, 地濃拓郎, 藤原裕司, 神保睦子
  • Organizer: 第34回日本磁気学会学術講演会
  • Place of Presentation: 筑波
• [Presentation] Magnetoresistance of Co_2FeAi_<0.5>Si_<0.5>-MgF_2 granular films (2010)
  • Author(s): Y.Fujiwara, S.Ozaki, Y.Urakawa, K.Sato, M.Kondo, M.Jimbo, T.Kato, T.Kobayashi
  • Organizer: The 2^<nd> Int.Symposium on Advanced magnetic Materials and Applications (ISAMMA 2010)
  • Place of Presentation: 仙台
• [Presentation] Magnetoresistance and electronic of granular films with MgO or MgF_2 matrices (2010)
  • Author(s): Y.Fujiwara, H.Matsuda, K.Sato, M.Jimbo, T.Kobayashi
  • Organizer: The 2^<nd> Int.Symposium on Advanced magnetic Materials and Applications (ISAMMA 2010)
  • Place of Presentation: 仙台
• [Presentation] Tunneling magnetoresistance effect and structure of granular films using CoFeAlSi alloy
  • Author(s): M. Kondo, T. Chino, M. Hattori, Y. Urakawa, Y. Fujiwara, T. Kato, M. Jimbo
  • Organizer: International Conference of the Asian Union of Magnetics Societies
  • Place of Presentation: 奈良県公会堂