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Microstructured Magnetcoelectronic Devices Based on Spin Dependent Electron Scattering with Magnetic Multilayrs

Research Project

Project/Area Number 06452231
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 電子デバイス・機器工学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

MATSUYAMA Kimihide  Kyushu Univ., Graduate School of Information Science and Electrical Engineering, Associate Professor, 大学院・システム情報科学研究科, 助教授 (80165919)

Co-Investigator(Kenkyū-buntansha) ASADA Hironori  Kyushu Univ., Graduate School of Information Science and Electrical Engineering,, 大学院・システム情報科学研究科, 助手 (70201887)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1995: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1994: ¥5,500,000 (Direct Cost: ¥5,500,000)
KeywordsMagnetic Thin Film / Grant Magnetoresistance Effect / Spin Valve / Magnetic Tunneling Effect / Spin Dependent Electron Scattering
Research Abstract

Microstructured magnetoelectronic (ME) devices, composed of uncoupled magnetic multilayrs, have been fabricated with lithographic techniques. Fundamental device performance, based on the spin dependent electron transport, have been studied.
1. Sensitive spin valve effect in microstructured multilayrs. --- Highly sensitive magnetoresistance (MR) change of 6% for the external field of 20 Oe was attained in a microstructured strip pattern of Ni-Fe/Cu/Co and based multilayr, deposited with an electron beam evaporation Magnetostatic shape effects were clarified from the MR measurements of strip patterns with various pattern widths down to 0.4 mum, which were structured with a direct electron beam lithography and Ar ion milling.
2. Fabrication of corrent perpendicular to plane (CPP) ME devices. --- Microfabrication processes for CPP-ME devices with three dimentional electrodes been developed. MR change of 8 mOMEGA was observed at room temperature for a ferromagnetic tunnel junction of Co/Cu/CuO/Co, which tunnel barrier CuO was formed with in-situ rf plasma oxidation. MR effects were also observed in CPP-ME devices with a-Si or a-Ge as nonmagnetic layrs, which suggest the spin dependent electron transport in amorphous semiconductors.
3. Development of magnetic random access memory (M-RAM). ---A M-RAM memory cell composed of evaporated Ni-Fe/Co/Cu/Co with lateral size of 2*5 mum^2 and an overlaid conductor pattern was designed and fabricated. High speed bistable bit state change (write operation) was performed with conductor current of 20 ns pulse width, and electrically detected by MR measurement (read operation).

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (39 results)

All Other

All Publications (39 results)

  • [Publications] K.Matsuyama: "Successive Bloch Line Write Operation in a 1 μm Bubble Material" Journal of Applied Physics. 75. 6086-6088 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Asada: "Micromagnetic Computation for Wall and Bloch Line Coercivity in Thin Film with Perpendicular Anisotropy" Journal of Applied Physics. 75. 6089-6091 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] B.B.Pant: "One-Dimensional Model of Magnetic Domain Wall with Self-Induced Anisotropy" Japanese Journal of Applied Physics. 34. 4779-4785 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: "Fabrication of Microstructured Magnetic Tunneling Valve Junction" IEEE Transactions on Magnetics. 31. 3176-3178 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: "Magnetoresistance Behavior in Microfabicated Trilayer Strip Pattern" Journal of Magnetism and Magnetic Materials. 156. 301-302 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: "Perpendicular Spin Valve Behavior in a Microstructured Co/Cu-Cu Oxide trilayer" Journal of Applied Physics. 79. 5318-5320 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.J.Fogarty: "Fundamental Studies of Stripe-Domain Chopping in the Presence of Magnetic Fields" Journal of Applied Physics. 79. 6643-6645 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Asada: "Micromagnetic Study on Write Operation in Sub-micron Magnetic Random Access Memory" Journal of Applied Physics. 79. 6646-6648 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Asada: "Micromagnetic Study on Dynamic Properties of Write Operation in Magnetic Random Access Memory Cell" IEEE Transactions on Magnetics. 32. 4001-4003 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: "High Senstive Magnetoresistance in Evaporated Spin Valves with Growth-Induces Uniaxial Anisotropy" IEEE Transactions on Magnetics. 32. 4612-4614 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: "Spin Dependent Transport Perpendicular to CoPt/S/Co(S=Si,Ge)Trilayers" Journal of Applied Physics. 81(印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: ""Successive Bloch Line Write Operation in a 1mum Bubble Material"" Journal of Applied Physics. Vol.75. 6086-6088 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Asada: ""Micromagnetic Computation for Wall and Bloch Line Coercivity in Thin Film with Perpendicular Anisotropy"" Journal of Applied Physics. Vol.75. 6089-6091 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] B.B.Pant: ""One-Dimentional Model of Magnetic Domain Wall with Self-Induced Anisotropy"" Japanese Journal of Applied Physics. Vol.34. 4779-4785 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: ""Fabrication of Microstructured Magnetic Tunneling Valve Junction"" IEEE Transactions on Magnetics. Vol.31. 3176-3178 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: ""Magnetoresistance Bahvior in Microfabricated Trilayr strip Pattern"" Journal of Magnetism and Magnetic Materials. Vol.156. 301-302 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: ""Perpendicular Spin Valve Behavior in a Microstructured Co/Cu-Cu oxide/Co Trilayr"" Journal of Applied Physics. Vol.79. 5318-5320 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.J.Fogarty: ""Fundamental Studies of Stripe-Domain Chopping in the Presence of Magnetic Fields"" Journal of Applied Physics. Vol.79. 6643-6645 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Asada: ""Micromagnetic Study on Write Operation in Submicron Magnetic Random Access Memory Cell"" Journal of Applied Physics. Vol.79. 6646-6648 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Asada: ""Micromagnetic Study on Dynamic Properties of Write Operation in Magnetic Random Access Memory Cell"" IEEE Transactions on Magnetics. Vol.32. 4001-4003 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: ""High Sensitive Magnetoresistance in Evaporated Spin Valves with Growth-Induces Uniaxial Anisotropy"" IEEE Transactions on Magnetics. Vol.32. 4612-4614 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: ""Spin Dependent Transport Perpendicular to CoPt/S/Co (S=Si, Ge) Trilayrs"" Journal of Applied Physics. Vol.81(printing).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Matsuyama: "Perpendicular Spin Valve Behavior in a Microstructured Co/Cu-cu Oxide trilayer" Journal of Applied Physics. 79. 5318-5320 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Asada: "Micromagnetic Study on Write Operation in Sub-micron Magnetic Random Access Memory" Journal of Applied Physics. 79. 6646-6648 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Matsuyama: "Magnetoresistance Behavior in Microfabicated Trilayer Strip Pattern" Journal of Magnetism and Magnetic Materials. 156. 301-302 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Asada: "Micromagnetic Study on Dynamic Properties of Write Operation in Magnetic Random Access Memory Cell" IEEE Transactions on Magnetics. 32. 4001-4003 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Matsuyama: "High Senstive Magnetoresistance in Evaporated Spin Valves with Growth-Induces Uniaxial Anisotropy" IEEE Transactions on Magnetics. 32. 4612-4614 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Matsuyama: "Spin Dependent Transport Perpendicular to CoPt/S/Co(S=Si,Ge)Trilayers" Journal of Applied Physics. 81(印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] K. Matsuyama: "Fabrication of Microstructured Nagnetic Tunneling Valve Junction" IEEE Transactions on Magnetics. 31. 3176-3178 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] B. B. Pant: "One-Dimensional Model of Magnetic Domain Wall witn Self-Induced Anisotropy" Japanese Journal of Applied Physics. 34. 4779-4785 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] K. Matsuyama: "Perpendicular Spin Valve Behavior in a Microstructured Co/Cu-Cu Oxide Trilayer" Journal of Applied Physics. 78(印刷中). (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H. Asada: "Micromagnetic Study on Write Operation in Sub-micron Magnetic Randam Access Memory Cell" Journal of Applied Physics. 78(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] K. Matsuyama: "Magnetoresistance Behavior in Microfabicated Trilayer Strip Pattern" Journal of Magnetism and Magnetic Materials. (印刷中).

    • Related Report
      1995 Annual Research Report
  • [Publications] Kiyotoshi Yasumoto: "Coupled-Mode Analysis of Polarization Splitting Directional Coupler" Journal of Optical Society of America A. Vol.11. 2249-2256 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kiyotoshi Yasumoto: "Numerical Analysis of an Asymmetric Nonlinear Directional Coupler" Microwave and Optical Technology Letters. Vol.7. 627-632 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 安元清俊: "導波路の曲り部を考慮に入れた方向性結合器の解析" 電子情報通信学会論文誌. Vol.J77-C-I. 686-694 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kiyotoshi Yasumoto: "Coupled-Mode Analysis of a Symmetric Nonlinear Directional Coupler Using a Singular Perturbation Scheme" IEICE Transactions on Electronics. Vol.E77-O. 1771-1775 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kiyotoshi Yasumoto: "Coupled-Mode Analysis of a Three-Waveguide Nonlinear Directional Coupler" Proceedings of 1994 Asia-Pacific Microwave Conference. Vol.2. 705-708 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kiyotoshi Yasumoto: "Coupled-Mode Formulation of Multilayered and Multiconductor Transmission Lines" Proceedings of URSI International Symposium on Electromagnetic Theory. (to be published). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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