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Development of depth-resolved soft X-ray absorption spectroscopy with fluorescence energy selection and observation of ionic conductor/ferro magnetic thin film interface

Research Project

Project/Area Number 17K14324
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics I
Research InstitutionGunma University (2018)
High Energy Accelerator Research Organization (2017)

Principal Investigator

Suzuki-Sakamaki Masako  群馬大学, 大学院理工学府, 准教授 (90598880)

Research Collaborator AMEMIYA Kenta  
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
KeywordsX線吸収分光 / 深さ分解 / 磁性薄膜 / イオン伝導体 / 表面・界面 / 電界効果 / 界面 / X線磁気円二色性 / 表面・界面物性 / X線
Outline of Final Research Achievements

To observe the chemical/magnetic state of the ferromagnetic thin film interface under the electric field, we develop the fluorescence yield depth-resolved soft x-ray absorption spectroscopy that is based on the electron yield depth-resolved technique. Interface analysis with a nm-depth resolution has been realizes. In this study, we develop the high signal-to-background (S/B) ratio depth-resolved soft XAS by fluorescence energy selection. We finally succeed obtaining the Fe and Co fluorescence selective XAS spectra of the FeCo thin film, and realize 100-times enhancement of the S/B ratio.

Academic Significance and Societal Importance of the Research Achievements

多くの積層デバイスにおいて、演算や記憶などの機能を担っているのは界面であり、さらなる機能の向上を目指すには界面の精密な電子状態を調べる必要がある。界面を直接観察する手法は限られ、特に分光学的な分析法は我々が開発を行う深さ分解XAS法が唯一の手法である。さらに最近ではよりデバイスの動作状態に近い環境で界面観察をする手法が求められており、本研究で開発した蛍光分光型深さ分解XAS法を用いることで、電場や磁場がある環境でも高感度に界面の化学・磁気状態を観察することが可能となった。nmの深さ分解能で界面状態を直接観察するオペランド分析法として、多くの積層デバイスへの応用が期待できる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (16 results)

All 2018 2017 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (11 results) (of which Int'l Joint Research: 4 results) Remarks (1 results)

  • [Journal Article] Observation of an electric field-induced interface redox reaction and magnetic modification in GdOx/Co thin film by means of depth-resolved X-ray absorption spectroscopy2018

    • Author(s)
      Sakamaki Masako、Amemiya Kenta
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 20 Issue: 30 Pages: 20004-20009

    • DOI

      10.1039/c8cp02972e

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of high signal-to-background ratio depth-resolved soft X-ray absorption spectroscopy by fluorescence energy selection2018

    • Author(s)
      Suzuki-Sakamaki Masako、Amemiya Kenta
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 12 Pages: 120308-120308

    • DOI

      10.7567/jjap.57.120308

    • NAID

      210000149835

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of interface NiO layer on magnetism in Fe/BaTiO3 thin film2018

    • Author(s)
      Masako Sakamaki and Kenta Amemiya
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 印刷中

    • NAID

      210000149600

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nanometer-resolution depth-resolved measurement of florescence-yield soft x-ray absorption spectroscopy for FeCo thin film2017

    • Author(s)
      Sakamaki M.、Amemiya K.
    • Journal Title

      Review of Scientific Instruments

      Volume: 88 Issue: 8

    • DOI

      10.1063/1.4986146

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 蛍光収量深さ分解XAFS法による外場中界面分析2018

    • Author(s)
      酒巻真粧子、雨宮健太
    • Organizer
      2017年度量子ビームサイエンスフェスタ、茨城県立県民文化センター(茨城・水戸)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 蛍光収量型深さ分解XAFS法による磁場中界面分析2018

    • Author(s)
      酒巻真粧子、雨宮健太
    • Organizer
      第73回日本物理学会年次大会、東京理科大学野田キャンパス(千葉・野田)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Direct observation of electric-field effect on interface magnetic state of GdOx/Co thin films by fluorescence-yield depth-resolved soft x-ray absorption spectroscopy2018

    • Author(s)
      M. Sakamaki and K. Amemiya
    • Organizer
      The 17th International Conference on X-ray Absorption Fine Structure (XAFS 2018) (Krakow, Poland) (Poster)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 精密界面分析に向けた蛍光分光深さ分解XAFS法の開発2018

    • Author(s)
      酒巻真粧子、雨宮健太
    • Organizer
      第21回XAFS討論会、北海道大学(北海道・札幌)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 蛍光収量深さ分解XAFS法による外場中界面分析2018

    • Author(s)
      酒巻真粧子,雨宮健太
    • Organizer
      2017年度量子ビームサイエンスフェスタ、茨城県立県民文化センター(茨城・水戸)
    • Related Report
      2017 Research-status Report
  • [Presentation] NiO/Ni/Cu(001) における磁気異方性の制御2018

    • Author(s)
      雨宮健太,酒巻真粧子
    • Organizer
      第73回日本物理学会年次大会、東京理科大学野田キャンパス(千葉・野田)
    • Related Report
      2017 Research-status Report
  • [Presentation] 蛍光収量型深さ分解XAFS法による磁場中界面分析2018

    • Author(s)
      酒巻真粧子,雨宮健太
    • Organizer
      第73回日本物理学会年次大会、東京理科大学野田キャンパス(千葉・野田)
    • Related Report
      2017 Research-status Report
  • [Presentation] Depth profile of surface oxidation on FeCo thin film by depth resolved X-ray absorption spectroscopy2017

    • Author(s)
      M. Sakamaki and K. Amemiya
    • Organizer
      The 21st Interdisciplinary Surface Science Conference (ISSC-21), Manchester (UK)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of Electric Field on Magnetism of Ni Thin Films via Antiferromagnetic NiO2017

    • Author(s)
      K. Amemiya and M. Sakamaki
    • Organizer
      The 8th International Symposium on Surface Science (ISSS-8), Tsukuba International Congress Centre (Ibaraki・Tsukuba)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observation of the electric-field effect in Fe/BaTiO3 thin films with the interface oxide layers2017

    • Author(s)
      M. Sakamaki and K. Amemiya
    • Organizer
      The 8th International Symposium on Surface Science (ISSS-8), Tsukuba International Congress Centre (Ibaraki・Tsukuba)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 蛍光収量型深さ分解XMCD法による磁性薄膜研究2017

    • Author(s)
      酒巻真粧子,雨宮健太
    • Organizer
      東北大学金属材料研究所共同利用ワークショップ、東北大学金属材料研究所(宮城・仙台)
    • Related Report
      2017 Research-status Report
  • [Remarks] 電場・磁場中で薄膜の深さ方向ナノメーター分解能を実現

    • URL

      https://www.kek.jp/ja/NewsRoom/Release/pressrelease20170808.pdf

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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