Fabrication of novel spintronic devices using the ferromagnet/diamond semiconductor heterostructures

• Project/Area Number: 22760250
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: Nagoya University
• Principal Investigator: UEDA Kenji 名古屋大学, 工学研究科, 准教授 (10393737)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 量子デバイス・スピンデバイス / ダイヤモンド / ダイヤモンド半導体 / 強磁性 / スピン注入 / スピンデバイス / ハーフメタル / ショットキー接合 / スピントロニクス / 強磁性体 / ホイスラー合金

Research Abstract

In this research, we tried fabricating novel spintronic devices using ferromagnets/diamond semiconductors heterostructures and obtained mainly following three results.(1) It is found that ferromagnetic and half-metallic Heusler Co_2MnSi can be epitaxially grown on diamond for the first time.(2) Schottky barrier heights between ferromagnetic metal and diamond semiconductor can be controlled by selecting ferromagnetic metals with proper work function.(3) Signals related to spin injection were observed by 3-probe Hanle measurements using Ni/diamond ferromagnetic heterojunctions(τ=～20ps).

Research Products

• [Journal Article] Ferromagnetic Schottky junctions using diamond semiconductors (2012)
  • Author(s): K. Ueda, T. Soumiya and H. Asano
  • Journal Title: Diamond Relat. Mater Volume: 25 Pages: 159-162
  • DOI: 10.1016/j.diamond.2012.02.015
  • NAID: 130002112355
  • Peer Reviewed
• [Journal Article] Fabrication of MgAl_2O_4 thin films on ferromagnetic Heusler alloy Fe_2CrSi by reactive magnetron sputtering (2012)
  • Author(s): N.Fukatani, K.Inagaki, K.Mari, H.Fujita, T.Miyawaki, K.Ueda, H.Asano
  • Journal Title: Japanese Journal of Applied Physics Volume: 51 Issue: 2S Pages: 02BM04-02BM04
  • DOI: 10.1143/jjap.51.02bm04
  • Peer Reviewed
• [Journal Article] Ferromagnetic Schottky junctions using diamond semiconductors (2012)
  • Author(s): K.Ueda, T.Soumiya, H.Asano
  • Journal Title: Diamond and Related Materials Volume: 25 Pages: 159-162
  • NAID: 130002112355
  • Peer Reviewed
• [Journal Article] Fabrication of MgAl_2O_4 Thin Films on Ferromagnetic Heusler Alloy Fe_2 CrSi by Reactive Magnetron Sputtering (2012)
  • Author(s): N.Fukatani, K.Inagaki, K.Mari, H.Fujita, T.Miyawaki, K.Ueda, H.Asano
  • Journal Title: Jpn.J.Appl.Phys. Volume: 51
  • Peer Reviewed
• [Journal Article] Magnetic and electric properties of double perovskite Sr_<2-x> La_xVMoO_6 (2011)
  • Author(s): H. Matsushima, H. Gotoh, Y. Takeda, K. Ueda, and H. Asano
  • Journal Title: Jpn. J. Appl. Phys Volume: 50 Issue: 10R Pages: 103004-103004
  • DOI: 10.1143/jjap.50.103004
  • Peer Reviewed
• [Journal Article] Epitaxial strain and antiferromagnetism in Heusler Fe_2VSi thin films (2011)
  • Author(s): N.Fukatani, K.Ueda, H.Asano
  • Journal Title: Journal of Applied Physics Volume: 109 Issue: 7
  • DOI: 10.1063/1.3555089
  • Peer Reviewed
• [Journal Article] Magnetic and electric properties of double perovskite Sr_<2-x>La_xVMoO_6 (2011)
  • Author(s): H.Matsushima, H.Gotoh, Y.Takeda, K.Ueda, H.Asano
  • Journal Title: Jpn.J.Appl.Phys. Volume: 50
  • Peer Reviewed
• [Journal Article] Epitaxial strain and antiferromagnetism in Heusler Fe_2VSi thin films (2011)
  • Author(s): N.Fukatani, K.Ueda, H.Asano
  • Journal Title: J.Appl.Phys. Volume: 109
  • Peer Reviewed
• [Journal Article] Stabilization of Antiferromagnetism in Strained Fe_2VSi Thin Films (2010)
  • Author(s): N.Fukatani, Y.Takeda, K.Ueda, H.Asano
  • Journal Title: Journal of the Magnetics Society of Japan Volume: 34 Pages: 307-310
  • Peer Reviewed
• [Journal Article] Spin Filter Effect of La_<0.7>Sr_<0.3>MnO_3/Bi_<1-x>Ba_xFeO_3 Junctions (2010)
  • Author(s): S.Kobayashi, S.Tachiki, K.Yoshimoto, Y.Sugimoto, Y.Takeda, K.Ueda, H.Asano
  • Journal Title: Journal of the Magnetics Society of Japan Volume: 34 Pages: 499-502
  • Peer Reviewed
• [Journal Article] ダイヤモンド半導体を用いた強磁性ショットキー接合の作製
  • Author(s): 宗宮嵩・植田研二・深谷直人・宮脇哲也・浅野秀文
  • Journal Title: 日本磁気学会誌
  • NAID: 130002112355
  • Peer Reviewed
• [Journal Article] ダイヤモンド半導体を用いた強磁性ショットキー接合の作製
  • Author(s): 宗宮嵩・植田研二・深谷直人・宮脇哲也・浅野秀文
  • Journal Title: 日本磁気学会誌 Volume: (印刷中)(in press)
  • NAID: 130002112355
  • Peer Reviewed
• [Presentation] 中間層に酸化物半導体を用いた接合における磁気抵抗効果と電気伝導メカニズム (2012)
  • Author(s): 戸澤克倫,植田研二,作間啓太,小林耕平,鈴木亮佑,宮脇哲也,浅野秀文
  • Organizer: 2012春季第59回応用物理学会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2012-03-15
• [Presentation] 中間層に酸化物半導体を用いた接合における磁気抵抗効果と電気伝導メカニズム (2012)
  • Author(s): 戸澤克倫, 植田研二, 作間啓太, 小林耕平, 鈴木亮佑, 宮脇哲也, 浅野秀文
  • Organizer: 2012春季第59回応用物理学会
  • Place of Presentation: 早稲田大学(東京都)
  • Year and Date: 2012-03-15
• [Presentation] Fabrication of Schottky junctions using diamond/ferromagnet heterostructures (2011)
  • Author(s): T. Soumiya, K. Ueda, and H. Asano
  • Organizer: International Symposium on Eco Topia Science(ISETS)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2011-12-10
• [Presentation] Fabrication of Schottky junctions using diamond/ferromagnet heterostructures (2011)
  • Author(s): T.Soumiya, K.Ueda, H.Asano
  • Organizer: International Symposium on EcoTopia Science (ISETS)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2011-12-10
• [Presentation] ダイヤモンド半導体を用いた強磁性ショットキー接合の作製 (2011)
  • Author(s): 宗宮嵩,深谷直人,宮脇哲也,植田研二,浅野秀文
  • Organizer: 第35回日本磁気学会学術講演会
  • Place of Presentation: 朱鷺メッセ、新潟
  • Year and Date: 2011-09-30
• [Presentation] ダイヤモンド半導体を用いた強磁性ショットキー接合の作製 (2011)
  • Author(s): 宗宮嵩, 深谷直人, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 第35回日本磁気学会学術講演会
  • Place of Presentation: 朱鷺メッセ(新潟県)
  • Year and Date: 2011-09-30
• [Presentation] Magneto resistance effects in La_<1-x> Sr_xMnO_3/Nb-SrTiO_3/Co junctions (2011)
  • Author(s): K. Tozawa, K. Kobayashi, T. Miyawaki, K. Ueda, and H. Asano
  • Organizer: 2011 International Conference on Solid State Devices and Materials(SSDM2011)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2011-09-29
• [Presentation] Magnetoresistance effects in La_<1-x>Sr_xMnO_3/Nb-SrTiO_3/Co junctions (2011)
  • Author(s): K.Tozawa, K.Kobayashi, T.Miyawaki, K.Ueda, H.Asano
  • Organizer: 2011 International Conference on Solid State Devices and Materials (SSDM)
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2011-09-29
• [Presentation] Ferromagnetic Schottky junctions using diamond semiconductors (2011)
  • Author(s): K. Ueda, T. Soumiya, T. Tozawa H. Asano
  • Organizer: Diamond 2011
  • Place of Presentation: Garmish-Partenkirchen, Bavaria, Germany
  • Year and Date: 2011-09-08
• [Presentation] Ferromagnetic Schottky junctions using diamond semiconductors (2011)
  • Author(s): K.Ueda, T.Soumiya, T.Tozawa H.Asano
  • Organizer: Diamond 2011
  • Place of Presentation: Garmish-Partenkirchen Bavaria, Germany
  • Year and Date: 2011-09-08
• [Presentation] Transport and local magnetic properties in strained Fe_2VSi thin film (2011)
  • Author(s): N. Fukatani, K. Ueda, H. Asano and K. Mibu
  • Organizer: INTERMAG 2011
  • Place of Presentation: TAIPEI, Taiwan
  • Year and Date: 2011-04-25
• [Presentation] 格子整合系MgAl_2O_4/ホイスラー合金積層構造の結晶構造評価 (2011)
  • Author(s): 宮脇哲也, 真利研一郎, 高橋一成, 藤田裕人、深谷直人、植田研二, 浅野秀文
  • Organizer: 磁気記録・情報ストレージ研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2011-03-11
• [Presentation] CoFe_2O_4/Ba_<0.7>Sr_<0.3>TiO_3複合構造のマルチフェロイック特性 (2011)
  • Author(s): 田代裕樹, 小林耕平, 小林智, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 磁気記録・情報ストレージ研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2011-03-11
• [Presentation] 格子整合MgAl_2O_4スホイスラー合金積層膜の結晶構造及び磁気特性評価 (2011)
  • Author(s): 真利研一郎, 高橋一成, 藤田裕人, 深谷直人, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 2011春季第58回応用物理学会
  • Place of Presentation: (要旨集)
  • Year and Date: 2011-03-09
• [Presentation] Fe_4N/MgO/NbN接合の準粒子トンネル分光 (2011)
  • Author(s): 北條貴之, 作間啓太, 宮脇哲也, 植田研二, 浅野秀文, 駒崎洋亮, 角田匡清
  • Organizer: 2011春季第58回応用物理学会
  • Place of Presentation: (要旨集)
  • Year and Date: 2011-03-09
• [Presentation] ペロブスカイト酸化物電極上のBa_<0.7>Sr_<0.3>TiO_3薄膜の強誘電特性 (2011)
  • Author(s): 小林智, 小林耕平, 田代裕樹, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 2011春季第58回応用物理学会
  • Place of Presentation: (要旨集)
  • Year and Date: 2011-03-09
• [Presentation] Fe_2CrSi/Fe_2VSi人工格子における層間磁気結合 (2011)
  • Author(s): 宮脇哲也, 高橋一成, 深谷直人, 植田研二, 浅野秀文
  • Organizer: 2011春季第58回応用物理学会
  • Place of Presentation: (要旨集)
  • Year and Date: 2011-03-06
• [Presentation] 超伝導NbNを用いた強磁性Fe_4Nのスピン分極率解析 (2011)
  • Author(s): 北條貴之, 作間啓太, 宮脇哲也, 植田研二, 浅野秀文, 駒崎洋亮, 角田匡清
  • Organizer: IEEE Magnetics Society名古屋支部若手研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2011-02-23
• [Presentation] 反強磁性ホイスラー合金Fe_2VSi膜の歪効果と電気伝導特性 (2011)
  • Author(s): 深谷直人, 植田研二, 浅野秀文
  • Organizer: IEEE Magnetics Society名古屋支部若手研究会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2011-02-23
• [Presentation] Spin polarization measurements in Fe_4N/MgO/NbN tunnel junctions using quasiparticle tunneling spectroscopy (2011)
  • Author(s): T.Hohjo, K.Sakuma, T.Miyawaki, K.Ueda, H.Asano, Y.Komasaki, M.Tsunoda
  • Organizer: American Physical Society (2011 APS March Meeting)
  • Place of Presentation: U.S.A Dallas, Texas
• [Presentation] Epitaxial growth of the electron-doped Sr_<1-x>La_xCuO_2 by magnetron spattering (2011)
  • Author(s): K.Sakuma, H.Akatsuka, T.Miyawaki, K.Ueda, H.Asano
  • Organizer: American Physical Society (2011 APS March Meeting)
  • Place of Presentation: U.S.A Dallas, Texas
• [Presentation] BiFeO_3系マルチフェロイック薄膜の極薄膜化とスピンフィルター素子への応用 (2010)
  • Author(s): 浅野秀文, 小林智, 立木翔治, 小林耕平, 宮脇哲也, 植田研二
  • Organizer: 第12回金属/酸化物スピントロニクスセミナー
  • Place of Presentation: 東北大学
  • Year and Date: 2010-12-16
• [Presentation] 反強磁性ホイスラー合金薄膜の歪み効果と電子構造 (2010)
  • Author(s): 深谷直人, 植田研二, 藤田裕人, 高橋一成, 竹田陽一, 浅野秀文
  • Organizer: 第34回日本磁気学会ナノマグネティクス専門研究会
  • Place of Presentation: 日本化学会 化学会館 東京都千代田区
  • Year and Date: 2010-05-14
• [Presentation] ハーフメタル/Bi_<1-x>Ba_xFeO_3接合のスピンフィルター効果 (2010)
  • Author(s): 小林智, 吉本耕助, 立木翔治, 竹田陽一, 植田研二, 浅野秀文
  • Organizer: 平成21年度中部地区ナノテク総合支援報告会
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2010-05-11
• [Presentation] Bi_<0.75> Ba_<0.25>FeO_3/Ba_<0.7>Sr_<0.3>TiO_3 bilayred structures for multiferroic tunnel junctions (2010)
  • Author(s): S.Tachiki, K.Yoshimoto, S.Kobayashi, Y.Takeda, K.Ueda, H.Asano
  • Organizer: International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)
  • Place of Presentation: 仙台国際センター
• [Presentation] Carrier doping effects in the antiferromagnetic double perovskite Sr_<2-x>La_xVMoO_6 (2010)
  • Author(s): T.Hohjo, H.Matsushima, H.Gotoh, Y.Takeda, K.Ueda, H.Asano
  • Organizer: International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)
  • Place of Presentation: 仙台国際セシター
• [Presentation] Fe_2CrSi/Fe_2VSi多層膜の磁気特性と磁気抵抗効果 (2010)
  • Author(s): 宮脇哲也, 高橋一成, 藤田裕人, 竹田陽一、植田研二, 浅野秀文
  • 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
• [Presentation] Fe_2VSi薄膜の歪効果と電気伝導特性 (2010)
  • Author(s): 深谷直人, 植田研二, 浅野秀文
  • Organizer: 第34回日本磁気学会学術講演会
  • Place of Presentation: つくば国際会議揚
• [Presentation] ハーフメタルFe_2CrSi/MgAl_2O_4接合のヘテロエピタキシーとトンネル磁気抵抗効果 (2010)
  • Author(s): 藤田裕人, 真利研一郎, 深谷直人, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 2010秋季第71回応用物理学会
  • Place of Presentation: 長崎大学
• [Presentation] ダブルペロブスカイトSrLaVMoO_6薄膜の作製と評価 (2010)
  • Author(s): 松島宏行, 後藤大尚, 松島宏行, 後藤大尚, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 2010秋季第71回応用物理学会
  • Place of Presentation: 長崎大学
• [Presentation] マグネトロンスパッタリング法を用いた無限層超伝導Sr_<1-x>La_xCuO_2薄膜のエピタキシャル成長 (2010)
  • Author(s): 作間啓太, 植田研二, 浅野秀文, 宮脇哲也
  • Organizer: 2010秋季第71回応用物理学会
  • Place of Presentation: 長崎大学
• [Presentation] 半導体NbドープSrTiO_3を中間層に持つ磁気抵抗効果素子の作製 (2010)
  • Author(s): 戸澤克倫, 立木翔治, 宮脇哲也, 植田研二, 浅野秀文
  • Organizer: 2010秋季第71回応用物理学会
  • Place of Presentation: 長崎大学
• [Presentation] イオンビームアシストスパッタ法によるCVDダイヤモンド上への立方晶窒化ホウ素薄膜の作製 (2010)
  • Author(s): 植田研二, 浅野秀文
  • Organizer: 2010秋季第71回応用物理学会
  • Place of Presentation: 長崎大学
• [Presentation] Fabrication and physical properties of antiferromagnetic double perovskite compound Sr_<2-x>La_xVMoO_6 (2010)
  • Author(s): K.Ueda, H.Matsushima, T.Hojiyo, H.Gotoh, T.Miyawaki, H.Asano
  • Organizer: International Workshop on Oxide Electronics (WOE17)
  • Place of Presentation: 淡路夢舞台国際会議場
• [Presentation] ReBa_2Cu_3O_<7-8> Thin Films Grown on A-plane Sapphire Substrates with Oxide Buffer Layers (2010)
  • Author(s): K.Sakuma, K.Ueda, H.Asano, O.Michikami
  • Organizer: International Workshop on Oxide Electronics (WOE17)
  • Place of Presentation: 淡路夢舞台国際会議場
• [Presentation] ReBa_2Cu_3O_<7-8> Thin Films Grown on A-plane Sapphire Substrates with CeO_2 Buffer Layers (2010)
  • Author(s): K.Sakuma, O.Michikami, K.Ueda, H.Asano
  • Organizer: 23^<rd> International Symposium on Superconductivity (ISS)
  • Place of Presentation: エポカルつくば
• [Presentation] Fabrication and properties of double perovskite SrLaVMoO_6 epitaxial thin films (2010)
  • Author(s): H.Matsushima, H.Gotoh, T.Miyawaki, K.Ueda, H.Asano
  • Organizer: The 55^<th> Magnetism and Magnetic Materials Conference
  • Place of Presentation: U.S.A Georgia
• [Presentation] Epitaxial Bi_<0.75>Ba_<0.25>FeO_3/Ba_<0.7>Sr_<0.3>TiO_3 Structures for Multiferroic Junctions (2010)
  • Author(s): S.Tachiki, K.Yoshimoto, S.Kobayashi, T.Miyawaki, K.Ueda, H.Asano
  • Organizer: The 55^<th> Magnetism and Magnetic Materials Conference
  • Place of Presentation: U.S.A Georgia
• [Presentation] Fabrication of semiconducting cubic boron nitride films on CVD diamond by ion-beam assisted sputtering (2010)
  • Author(s): K.Ueda, H.Asano
  • Organizer: Materials Research Society (2010 MRS Fall Meeting)
  • Place of Presentation: U.S.A Boston
• [Remarks]
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• [Remarks]
  • URL: http://www.numse.nagoya-u.ac.jp/F5/k-ueda/index.htm
• [Remarks]
  • URL: http://www.numse.nagoya-u.ac.jp/F5/k-ueda/index.htm