• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of novel ferromagnetic tunnel contacts for efficient Si spintronic devices

Research Project

Project/Area Number 18K13807
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Spiesser Aurelie  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究員 (90793513)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordstunnel barrier / magnetic tunnel contact / magnetoresistance ratio / epitaxial growth / oxide tunnel barrier / coherent tunneling / spin transport in Si / spintronics
Outline of Final Research Achievements

The fabrication of an epitaxial ferromagnetic (FM) tunnel contact on a Si channel is the key to developing semiconductor-based spin-transport devices such as a spin metal-oxide-semiconductor field-effect transistor. In this project, we explore the use of a novel epitaxial oxide, SrO(001), as a tunnel barrier and investigate whether coherent spin-polarized tunneling occurs through the SrO(001) tunnel barrier. We demonstrate that large magnetoresistance ratios can be achieved in epitaxial SrO-based magnetic tunnel junctions, indicating spin-polarized coherent tunneling. Since SrO has a smaller lattice mismatch with Si (5%) than that between MgO and Si (23%), this material appears as a promising epitaxial tunnel barrier for achieving high magnetoresistance ratio in Si-based lateral spin transport devices.

Academic Significance and Societal Importance of the Research Achievements

半導体でのスピンの使用することにより,新しい機能を持つデバイスの開発が可能になる。
半導体におけるスピンの生成は、強磁性(FM)トンネルコンタクトからSCへの電気的スピン注入によって達成される。したがって、高スピン分極FMトンネルコンタクトの選択は、半導体において大きなスピン分極を生成するための重要なパラメータである。MgOはSiとの大きな格子不整合にもかかわらず,Si上のエピタキシャルトンネル障壁として今日までもっぱら使用されてきた。このプロジェクトでは,新しいトンネル障壁としてのSrOの利用を探求し,それが効率的なSiベースのスピン輸送デバイスを開発するための有望な材料であることを示した。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2019 2018

All Presentation (5 results) (of which Int'l Joint Research: 3 results)

  • [Presentation] Spin-Polarized Coherent Tunneling in Fully Epitaxial Magnetic Tunnel Junctions with SrO Tunnel Barrier2019

    • Author(s)
      Spiesser Aurelie, S, Kon, Y. Yasukawa, S. Yuasa, and H. Saito
    • Organizer
      JSAP Fall Meeting Sapporo
    • Related Report
      2019 Annual Research Report
  • [Presentation] Spin-Polarized Coherent Tunneling in Fully Epitaxial Magnetic Tunnel Junctions with SrO Tunnel Barrier2019

    • Author(s)
      Spiesser Aurelie, S, Kon, Y. Yasukawa, S. Yuasa, and H. Saito
    • Organizer
      MMM 2019 Las vegas
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] SrO障壁層を有する単結晶磁気トンネル接合の磁気抵抗効果2019

    • Author(s)
      昆慎太郎, 昆慎太郎, A. Spiesser, 安川雪子, 湯浅新治, 齋藤秀和
    • Organizer
      MSJ
    • Related Report
      2019 Annual Research Report
  • [Presentation] Fe/MgO tunnel contacts with 90% spin filtering in Si-based nonlocal devices2019

    • Author(s)
      A. Spiesser, Y. Fujita, H. Saito, S. Yuasa and R. Jansen
    • Organizer
      2019 Joint MMM-Intermag Conference, Washington DC, USA
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Quantification of spin drift in nonlocal devices with a heavily-doped Si channel2018

    • Author(s)
      A. Spiesser, H. Saito, Y. Fujita, S. Yamada, K. Hamaya, W. Mizubayashi, K. Endo, S. Yuasa and R. Jansen
    • Organizer
      E-MRS Fall Meeting, Warsaw Poland
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi