Study of large magnetoresistance effect in quantum cross devices

2010 Fiscal Year Final Research Report

• Project/Area Number: 21760001
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Hokkaido University
• Principal Investigator: KAIJU Hideo Hokkaido University, 電子科学研究所, 助教 (70396323)
• Project Period (FY): 2009 – 2010
• Keywords: スピントロニクス / 磁気抵抗効果 / ナノ接合 / 有機膜 / 強磁性体 / 表面・界面状態 / 磁化状態 / 電流電圧特性

Research Abstract

In this study, we have proposed quantum cross devices, which consist of organic molecules sandwiched between two ferromagnetic metals whose edges are crossed, and investigated their surface and interfacial structures, electrical characteristics, and magnetic properties. From the viewpoint of surface structures, magnetic properties, and edge states, Co/SiO2 is found to be the best materials for electrodes in quantum cross devices. As a result of the fabrication of Co/molecules/Co quantum cross devices, interesting switching properties have been successfully observed at room temperature.

Research Products

• [Journal Article] Surface and Interface Structures and Magnetic Properties of Ni and Ni <75>Fe <25> Thin Films on Polyethylene Naphthalate Organic Substrates (2011)
  • Author(s): H.Kaiju, N.Basheer, T.Abe, K.Kondo, A.Hirata, M.Ishimaru, Y.Hirotsu, A.Ishibashi
  • Journal Title: J.Vac.Soc.Jpn. Vol.54 Pages: 203-206
  • Peer Reviewed
• [Journal Article] Large Thermoelectric Voltage in Point Contacts of Ni Ferromagnetic Metals (2011)
  • Author(s): K.Kondo, H.Kaiju, A.Ishibashi
  • Journal Title: Mater.Res.Soc.Symp.Proc. Vol.1314 Pages: ll0836-1-ll0836-6
  • Peer Reviewed
• [Journal Article] The fabrication of Ni quantum cross devices with a 17 nm junction and their current?voltage characteristics (2010)
  • Author(s): H.Kaiju, K.Kondo, A.Ono, N.Kawaguchi, J.H.Won, A.Hirata, M.Ishimaru, Y.Hirotsu, A.Ishibashi
  • Journal Title: Nanotechnology Vol.21 Pages: 015301-1-015301-6
  • Peer Reviewed
• [Journal Article] Surface Roughness and Magnetic Properties of Ni and Ni <78>Fe <22> Thin Films on Polyethylene Naphthalate Organic Substrates (2010)
  • Author(s): H.Kaiju, N.Basheer, K.Kondo, A.Ishibashi
  • Journal Title: IEEE Trans.Magn. Vol.46 Pages: 1356-1359
  • Peer Reviewed
• [Journal Article] A Theoretical Study and Realization of New Spin Quantum Cross Structure Devices using Organic Materials (2010)
  • Author(s): K.Kondo, H.Kaiju, A.Ishibashi
  • Journal Title: Mater.Res.Soc.Symp.Proc. Vol.1198 Pages: E07011-E07016
  • Peer Reviewed
• [Journal Article] Fabrication and Current-Voltage Characteristics of Ni Spin Quantum Cross Devices with P3HT : PCBM Organic Materials (2010)
  • Author(s): H.Kaiju, K.Kondo, N.Basheer, N.Kawaguchi, S.White, A.Hirata, M.Ishimaru, Y.Hirotsu, A.Ishibashi
  • Journal Title: Mater.Res.Soc.Symp.Proc. Vol.1252 Pages: J02081-J02086
  • Peer Reviewed
• [Journal Article] Current-Voltage Characteristics in Nanoscale Tunnel Junctions Utilizing Thin-Film Edges (2010)
  • Author(s): H.Kaiju, K.Kondo, A.Ishibashi
  • Journal Title: Jpn.J.Appl.Phys. Vol.49 Pages: 105203-1-105203-5
  • Peer Reviewed
• [Journal Article] Theoretical and Experimental Results of Electronic Transport of Spin Quantum Cross Structure Devices (2009)
  • Author(s): K.Kondo, H.Kaiju, A.Ishibashi
  • Journal Title: J.Appl.Phys. Vol.105 Pages: 07D522-1-07D522-3
  • Peer Reviewed
• [Journal Article] Fabrication of Quantum Cross Devices Using Ni Thin Films on Polyethylene Naphthalate Organic Substrates (2009)
  • Author(s): H.Kaiju, K.Kondo, A.Ono, N.Kawaguchi, J.H.Won, A.Hirata, M.Ishimaru, Y.Hirotsu, A.Ishibashi
  • Journal Title: J.Magn.Soc.Jpn. Vol.33 Pages: 242-246
  • Peer Reviewed
• [Presentation] Large Thermoelectric Voltage in Point Contacts of Ni Ferromagnetic Metals (2010)
  • Author(s): K.Kondo, H.Kaiju, A.Ishibashi
  • Organizer: 2010 Material Research Society Fall Meeting, LL8.36
  • Place of Presentation: Boston, Massachusetts
  • Year and Date: 2010-12-01
• [Presentation] ポリエチレンナフタレート(PEN)有機膜上のNi及びNi <75>Fe <25>薄膜における表面・界面構造と磁気特性 (2010)
  • Author(s): 海住英生、ヌブラバシール、阿部太郎、近藤憲治、平田秋彦、石丸学、弘津禎彦、石橋晃
  • Organizer: 真空・表面科学合同講演会第30回表面科学学術講演会第51回真空に関する連合講演会 5P-036V
  • Place of Presentation: 大阪大学
  • Year and Date: 2010-11-05
• [Presentation] ポリエチレンナフタレート有機膜上のNi及びNi <75>Fe <25>薄膜の表面状態と電気磁気特性 (2010)
  • Author(s): 海住英生、ヌブラバシール、近藤憲治、石橋晃
  • Organizer: 日本物理学会秋季大会 25aPS-11
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25
• [Presentation] Ni/P3HT : PCBM/Niナノスケール接合の作製とその評価 (2010)
  • Author(s): 海住英生、近藤憲治、ヌブラバシール、川口敦吉、スザンホワイト、平田秋彦、石丸学、弘津禎彦、石橋晃
  • Organizer: 日本物理学会秋季大会 23pPSB-67
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 有機分子を挟んだナノスケール接合素子の理論とそのデバイスの作製 (2010)
  • Author(s): 近藤憲治、海住英生、石橋晃
  • Organizer: 日本物理学会秋季大会 23pPSB-66
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] Large Thermoelectric Voltage in Ni Nanoscale Junctions (2010)
  • Author(s): H.Kaiju, K.Kondo, A.Ishibashi
  • Organizer: The 29th International Conference on Thermoelectrics P2-93
  • Place of Presentation: Shanghai, China
  • Year and Date: 2010-06-01
• [Presentation] Fabrication and current-voltage characteristics of Ni spin quantum cross devices with P3HT/PCBM organic materials (2010)
  • Author(s): H.Kaiju, K.Kondo, N.Basheer, N.Kawaguchi, S.White, A.Hirata, M.Ishimaru, Y.Hirotsu, A.Ishibashi
  • Organizer: 2010 Material Research Society Spring Meeting, San Francisco J2.7
  • Place of Presentation: California
  • Year and Date: 2010-04-06
• [Presentation] Fabrication and Evaluation of Ni/P3HT : PCBM/Ni Nanoscale Junctions (2010)
  • Author(s): H.Kaiju, K.Kondo, N.Basheer, N.Kawaguchi, S.White, A.Hirata, M.Ishimaru, Y.Hirotsu, A.Ishibashi
  • Organizer: International Symposium on Joint Research Network for Advanced Material and Devices, pp.113-114, P-32
  • Place of Presentation: Tomakomai, Japan
  • Year and Date: 2010-03-25
• [Presentation] Theoretical and Experimental Results of a Large Thermoelectric Voltage at Point Contacts of Spin Quantum Cross Structure Devices (2010)
  • Author(s): K.Kondo, H.Kaiju, A.Ishibashi
  • Organizer: 11th Joint MMM-Intermag Conference FR-10
  • Place of Presentation: Washington DC
  • Year and Date: 2010-01-21
• [Presentation] A Study of Ni and Ni78Fe22 Thin Films on Polyethylene Naphthalate Organic Substrates for Spin Quantum Cross Devices (2010)
  • Author(s): H.Kaiju, N.Basheer, K.Kondo, A.Ishibashi
  • Organizer: 11th Joint MMM-Intermag Conference BR-09
  • Place of Presentation: Washington DC
  • Year and Date: 2010-01-19
• [Presentation] A Theoretical Study and Realization of New Spin Quantum Cross Structure Devices using Organic Materials (2009)
  • Author(s): K.Kondo, H.Kaiju, A.Ishibashi
  • Organizer: 2009 Material Research Society Fall Meeting, E7.1
  • Place of Presentation: Boston, Massachusetts
  • Year and Date: 2009-12-02
• [Presentation] 磁場中及び無磁場中蒸着によるポリエチレンナフタレート有機膜上のニッケル薄膜に関する研究 (2009)
  • Author(s): 海住英生、小野明人、川口敦吉、近藤憲治、元鍾漢、平田秋彦、石丸学、弘津禎彦、石橋晃
  • Organizer: 日本物理学会秋季大会 26pPSB-19
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-26
• [Presentation] スピン量子十字構造素子の輸送特性の理論的研究とその実験検証 (2009)
  • Author(s): 近藤憲治、海住英生、石橋晃
  • Organizer: 日本物理学会秋季大会 25pPSA-21
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] トンネルバリアをもつ量子十字素子のトランスポート理論計算 (2009)
  • Author(s): 海住英生, 近藤憲治, 石橋晃
  • Organizer: 日本物理学会秋季大会 25pPSB-11
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-25
• [Presentation] Theoretical and Experimental Results of Electronic Transport of Spin Quantum Cross Structure Devices (2009)
  • Author(s): K.Kondo, H.Kaiju, d A.Ishibashi
  • Organizer: International Symposium of Post-Silicon Materials and Devices Research Alliance Project, P-15, p.54
  • Place of Presentation: Ichou Kaikan of OsakaUniversity, Osaka
  • Year and Date: 2009-09-05
• [Presentation] Fabrication and current-voltage characteristics of spin quantum cross devices (2009)
  • Author(s): H.Kaiju, K.Kondo, A.Ishibashi
  • Organizer: International Workshop on Photons and Spins in Nanostructures, Hokkaido University Sousei Conference room, p.57
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2009-07-27
• [Book] Lithography-Free Nanostructure Fabrication Techniques Utilizing Thin-Film Edges (2011)
  • Author(s): H.Kaiju, K.Kondo, A.Ishibashi
  • Total Pages: 978-953-308-72-7
  • Publisher: InTech "Lithography" ISBN [Invited, in press]
• [Remarks] ホームページ
  • URL: http://qed4.es.hokudai.ac.jp/
• [Patent(Industrial Property Rights)] プローブおよびその製造方法ならびにプローブ顕微鏡ならびに磁気ヘッドおよびその製造方法ならびに磁気記録再生装置 (2009)
  • Inventor(s): 石橋晃、海住英生
  • Industrial Property Rights Holder: 北海道大学
  • Industrial Property Number: 特許,特願2009-154644
  • Filing Date: 2009-06-30
• [Patent(Industrial Property Rights)] Nickel Thin Film, Method for Formation of the Nickel Thin Film, Ferromagnetic Nano-Junction Device, Method for roducing the Ferromagnetic Nano-Junction Device, Thin Metallic Wire, and Method for Formation of the Thin Metallic Wire (2008)
  • Inventor(s): H.Kaiju, M.Ishimaru, Y.Hirotsu, A.Ono, A.Ishibashi
  • Industrial Property Rights Holder: 北海道大学
  • Industrial Property Number: 特許,US-2010-0266868
  • Filing Date: 2008-08-28
• [Patent(Industrial Property Rights)] ニッケル薄膜およびその形成方法ならびに強磁性ナノ接合およびその製造方法ならびに金属細線およびその形成方法 (2008)
  • Inventor(s): 海住英生、石丸学、弘津禎彦、小野明人、石橋晃
  • Industrial Property Rights Holder: 北海道大学
  • Industrial Property Number: 特許,特願2009-534258
  • Filing Date: 2008-08-28