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Nanoscale Engineering of Compositional Modulations in Alloys and Composite Thin Film Oxides for Exploration of Their New Properties and Functionalities

Research Project

Project/Area Number 20H02610
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionTohoku University

Principal Investigator

MATSUMOTO Yuji  東北大学, 工学研究科, 教授 (60302981)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2022: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2021: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2020: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywords酸化物薄膜 / ナノ傾斜組成変調 / 光触媒 / 電池材料 / 強誘電体・磁性体
Outline of Research at the Start

本研究では、“組成変調ナノエンジニアリング”という新しい材料設計コンセプトに基づき、酸化物を対象として、ガルバノミラー走査型パルスレーザー堆積(PLD)法により、デジタル制御された任意の組成変調構造を有する酸化物薄膜の作製を試みる。電子やフォノン、イオンの拡散や伝搬、さらには波動関数の広がりと同程度にデザインされた組成変調構造の安定性、およびそのような薄膜の電子・磁気、光学特性や電極特性の評価を通じて、“ナノ組成変調酸化物混晶・複合薄膜”ならでは、の新規物性・機能発現を目指し,材料開発における“組成変調ナノエンジニアリング”の有用性を実証する。

Outline of Final Research Achievements

After the three-year period in this research program, the outcomes include the following: (a) Mg:ZnO band gap-graded films were fabricated and their photochemical properties were found to depend on the gradient direction of the films. (b) La: LiCoO2(LCO) films were prepared with La atoms preferentially substituted for the Li site. The introduction of a composition gradient structure for La in a LCO film improved the charge-discharge cycle performance, while it deteriorated for the La-LCO compositionally uniform films. (c) Ir:(La, Sr)MnO3 (LSMO) films were still ferromagnetic. The saturation magnetization of Ir-LSMO whose Ir was uniformly doped over the films exhibited an oscillatory behavior as the doped Ir content increased. In contrast, the saturation magnetization of Ir-LSMO films with composition gradients of Ir along the growing direction, was enhanced, significantly larger than expected from a simple linear sum of the magnetization of each constituent thin minute layer.

Academic Significance and Societal Importance of the Research Achievements

本研究では,酸化物薄膜材料を対象として,従来,強誘電体膜や金属の磁性膜に限られていた,電子やフォノン、イオンの拡散や伝搬、さらには波動関数の広がりと同程度の様々な“ナノスケールの組成変調”を有する薄膜をデザインすることで,単一組成のものとは異なる光電気化学特性や二次電池特性,さらには磁気特性が発現することを実験的に検証した。本成果は,“ナノスケールの組成変調”が材料設計の新しいコンセプトとして,今後,薄膜,バルク材料を問わず,産学における材料開発研究に積極的に取り入れられる契機となることが期待される。

Report

(3 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (4 results) (of which Invited: 1 results)

  • [Journal Article] Compositionally graded crystals as a revived approach for new crystal engineering for the exploration of novel functionalities2022

    • Author(s)
      Matsumoto Yuji、Maruyama Shingo、Kaminaga Kenichi
    • Journal Title

      CrystEngComm

      Volume: 24 Issue: 13 Pages: 2359-2369

    • DOI

      10.1039/d2ce00041e

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Epitaxial pillar matrix nanocomposite thin films of Bi-Ti-Fe-O and CoFe2O4 grown on SrTiO3 (110)2021

    • Author(s)
      Kawahira Y.、Harada R.、Maruyama S.、Koganezawa T.、Yasui S.、Itoh M.、Matsumoto Y.
    • Journal Title

      Journal of Applied Physics

      Volume: 130 Issue: 8 Pages: 084101-084101

    • DOI

      10.1063/5.0060610

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Sequential variation of super periodic structures emerged in Bi-layered perovskite pillar-matrix epitaxial nanocomposite films with spinel ferrites2021

    • Author(s)
      Harada R.、Kawahira Y.、Ikeda T.、Maruyama S.、Matsumoto Y.
    • Journal Title

      CrystEngComm

      Volume: 23 Issue: 47 Pages: 8404-8410

    • DOI

      10.1039/d1ce00990g

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flux-Mediated Doping of Bi into (La,Sr)MnO3 Films Grown on NdGdO3 (110) Substrates2020

    • Author(s)
      Mizufune Koji、Naganuma Hiroshi、Maruyama Shingo、Matsumoto Yuji
    • Journal Title

      ACS Applied Electronic Materials

      Volume: 2 Issue: 11 Pages: 3658-3666

    • DOI

      10.1021/acsaelm.0c00718

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Artificially Designed Compositionally Graded Sr-Doped NaTaO3 Single-Crystalline Thin Films and the Dynamics of Their Photoexcited Electron?Hole Pairs2020

    • Author(s)
      Konno Rio、Maruyama Shingo、Kosaka Takumu、Katoh Ryuzi、Takahashi Ryota、Kumigashira Hiroshi、Ichikuni Nobuyuki、Onishi Hiroshi、Matsumoto Yuji
    • Journal Title

      Chemistry of Materials

      Volume: 33 Issue: 1 Pages: 226-233

    • DOI

      10.1021/acs.chemmater.0c03487

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 傾斜組成CeドープLiCoO2エピタキシャル薄膜の作製2021

    • Author(s)
      鈴木 貫太、神永 健一、丸山 伸伍、松本 祐司
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 傾斜組成LiNixMnyCozO2薄膜作製に向けた LiNi0.67Mn0.33O2エピタキシャル薄膜2021

    • Author(s)
      鈴木 貫太、神永 健一、丸山 伸伍、松本 祐司
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 傾斜組成MgドープZnO薄膜の光触媒活性2021

    • Author(s)
      佐藤湧太、丸山伸伍、神永健一、松本祐司
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 「酸化物エピタキシー技術と新物質開発」2020

    • Author(s)
      松本祐司
    • Organizer
      強敵秩序とその操作に関わる第11回夏の学校
    • Related Report
      2020 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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