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Study on monochromatic electron beam emission from single crystalline Cr field emitters

Research Project

Project/Area Number 18K14125
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionMie University

Principal Investigator

Nagai Shigekazu  三重大学, 工学研究科, 助教 (40577970)

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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords電界放出電子源 / 電子分光 / Cr / 電界放出型電子源 / スピン偏極電子源 / 電界放出 / 電子ビーム応用
Outline of Final Research Achievements

A field-emitted electron source using Cr as a cathode material was developed and the energy distribution of emitted electrons was evaluated in order to achieve high spatial and energy resolutions for electron beam-based observation and analysis.
The formation of electron emission sites on W{113} formed on tungsten field-emitting cathodes under ultrahigh vacuum was attributed to the enhancement of a local field enhancement factor due to the formation of Cr microcrystals. The Cr/W spin-polarized electron source is found to be an electron source that can switch between the electron spin and energy coherency depending on the applied voltage, and the energy width of the emitted electrons can be reduced from 1 eV to 0.5 eV with decreasing emission current.

Academic Significance and Societal Importance of the Research Achievements

近年のデバイスの縮小化は,半導体だけでなくスピントロニクス応用を目指した磁性体材料においても重要課題である。そのため,高輝度,狭いエネルギー幅のスピン偏極電子源は,スピン関連物理現象の解明,ならびにその応用にとって不可欠である。本研究で実証された電子スピンとエネルギーのコヒーレント性をもつCr/W{113}電子源は,印加電圧によって切り替え可能であり,次世代のスピン評価装置の実現に寄与すると考えられる。

Report

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

    (6 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Control of Surface Structure and Characterization of Spin-polarized Field Electron Sources2020

    • Author(s)
      永井滋一
    • Journal Title

      Vacuum and Surface Science

      Volume: 63 Issue: 1 Pages: 19-24

    • DOI

      10.1380/vss.63.19

    • NAID

      130007784329

    • ISSN
      2433-5835, 2433-5843
    • Year and Date
      2020-01-10
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin-polarized field emission from Cr thin film deposited on W〈 001〉 tips2019

    • Author(s)
      Shigekazu Nagai, Naoya Sakai, Kento Miyazaki, Tatsuo Iwata, Koichi Hata
    • Journal Title

      Applied Surface Science

      Volume: 475 Pages: 273-277

    • DOI

      10.1016/j.apsusc.2018.12.192

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Field-emission of spin-polarized electrons from Cr thin film grown on W{113} surfaces2018

    • Author(s)
      Shigekazu Nagai, Kento Miyazaki, Kazuya Kunoh, Tatsuo Iwata, Koichi Hata
    • Journal Title

      Technical Digest of International Vacuum Nanoelectronics Conference 2018

      Volume: 1 Pages: 246-247

    • DOI

      10.1109/ivnc.2018.8520268

    • Related Report
      2018 Research-status Report
  • [Presentation] Energy distribution and spin polarization of field-emitted electrons from Cr on W(311) surface2019

    • Author(s)
      Shigekazu Nagai, Kento Miyazaki, Katsunari Suzuki, Eiji Oyaizu, Tatsuo Iwata, Koichi Hata
    • Organizer
      12th International Symposium on Atomic Level Characterization '19
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Field-emission of spin-polarized electrons from Cr thin film grown on W{113} surfaces2018

    • Author(s)
      Shigekazu Nagai, Kento Miyazaki, Kazuya Kunoh, Tatsuo Iwata, Koichi Hata
    • Organizer
      31st International Vacuum Nanoelectronics Conference (IVNC)
    • Related Report
      2018 Research-status Report
  • [Presentation] Cr/W{311}電界放出型スピン偏極電子源からの放出電子のエネルギー分析2018

    • Author(s)
      鈴木勝成,永井滋一,岩田達夫,畑浩一
    • Organizer
      2018年日本表面真空学会学術講演会
    • Related Report
      2018 Research-status Report

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

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