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酸化亜鉛中不純物Al位置での局在量子構造とその安定性

Research Project

Project/Area Number 13J05811
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field 量子ビーム科学
Research InstitutionKanazawa University

Principal Investigator

小松田 沙也加  金沢大学, 大学院自然科学研究科, 特別研究員(DC2)

Project Period (FY) 2013-04-26 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2014: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2013: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywords酸化亜鉛 / 酸素空孔形成エネルギー / 局在量子構造 / 摂動角相関 / 半導体
Outline of Annual Research Achievements

これまで本研究では摂動角相関法[1]により、空気中での熱処理によって形成するZnO中の不純物AlとInの強い会合状態が真空中での熱処理により解離する現象を観測してきた。またこの局所構造変化が希薄な酸素濃度条件下での熱処理中に生じるZnOの酸素空孔形成に誘起される現象であることを見出した。平成26年度はこの局所構造変化の熱処理時間依存性を詳細に調べることにより、この反応の1123 Kにおける速度定数を見積もることができた。さらに同様の実験を異なる温度で行い、速度定数の温度依存性をみつもり、そこからZnOの酸素空孔形成の活性化エネルギーに相当する値を実験的に0.72(6) eVと見積もった。これは理論計算によって得られた酸素空孔形成エネルギーの値[2]が本実験結果と近い値を示すことからも強く示唆された。
酸素空孔形成のエネルギーを実験によって見積もる手段は少なく,上記の結果は不純物をプローブとする摂動角相関法によって初めて得られた観測情報であるといえる。現在は試料の熱処理時の雰囲気条件を真空からアルゴンガスに変えて同様の実験を行い、圧力によるZnOの酸素空孔形成エネルギーの変化を調べている。また上記の研究成果をThe 5th Joint International Conference on Hyperfine Interactions and Symposium on Nuclear Quadrupole Interactions (HFI/NQI 2014) 、2014日本放射化学会年会・第58回放射化学討論会の国内外の学会にて報告し、それをまとめた論文がJournal of Applied Physics 誌、Journal of Radioanalytical and Nuclear Chemistry誌にそれぞれ掲載された。

[1] ホスト物質に放射性核種のプローブを導入し、プローブ位置での微視的な構造や性質を調べる分光法の一つ。本研究ではプローブに、ZnOのドナーである111Inを採用した。
[2] F. Oba et al. Phys. Rev. B, 77, 245202 (2008)など

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (15 results)

All 2015 2014 2013

All Journal Article (8 results) (of which Peer Reviewed: 7 results,  Open Access: 7 results,  Acknowledgement Compliant: 2 results) Presentation (7 results) (of which Invited: 1 results)

  • [Journal Article] Thermal stability of locally-associated Al and In impurities in zinc oxide2015

    • Author(s)
      S. Komatsuda, W. Sato, and Y. Ohkubo
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 303 Issue: 2 Pages: 1249-1252

    • DOI

      10.1007/s10967-014-3460-z

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Local structures at In impurity sites in ZnO probed by the TDPAC technique2015

    • Author(s)
      W. Sato, S. Komatsuda, Y. Yamada, and Y. Ohkubo
    • Journal Title

      Journal of Radioanalytical and Nuclear Chemistry

      Volume: 303 Issue: 2 Pages: 1201-1204

    • DOI

      10.1007/s10967-014-3446-x

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Atomic-level observation of Ag-ion hopping motion in AgI2015

    • Author(s)
      W. Sato, S. Komatsuda, R. Mizuuci, N. Irioka, S. Kawata, and Y. Ohkubo
    • Journal Title

      Hyperfine Interactions

      Volume: 231 Issue: 1-3 Pages: 107-113

    • DOI

      10.1007/s10751-014-1091-y

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Formation energy of oxygen vacancies in ZnO determined by investigating thermal behavior of Al and In impurities2014

    • Author(s)
      S. Komatsuda, W. Sato, and Y. Ohkubo
    • Journal Title

      Journal of Applied Physics

      Volume: 116 Issue: 18 Pages: 183502-183502

    • DOI

      10.1063/1.4901211

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Detection of spinel ZnIn2O4 formed as nanostructures in ZnO2014

    • Author(s)
      W. Sato, S. Komatsuda, Y. Yamada, and Y. Ohkubo
    • Journal Title

      Physical Review B

      Volume: 90 Issue: 23 Pages: 235204-235204

    • DOI

      10.1103/physrevb.90.235204

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Extranuclear dynamics of 111Ag(→111Cd) doped in AgI nanoparticles2014

    • Author(s)
      W. Sato, R. Mizuuci, N. Irioka, S. Komatsuda, S. Kawata, T. Azuma, and Y. Ohkubo
    • Journal Title

      Chemical Physics Letters

      Volume: 609 Pages: 104-107

    • DOI

      10.1016/j.cplett.2014.06.044

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stability of Locally-Associated Al and In Impurities Doped in Zinc Oxide2014

    • Author(s)
      S. Komatsuda, W. Sato, and Y. Ohkubo
    • Journal Title

      Proceedings of the Specialist Research Meeting on “Science and Engineering of Unstable Nuclei and Their Uses on Condensed Matter Physics’”

      Volume: KURRI-KUR-195 Pages: 5-9

    • Related Report
      2013 Annual Research Report
  • [Journal Article] Characteristic interactions of 111Cd probes with nonradioactive In impurities doped in ZnO2013

    • Author(s)
      W. Sato, S. Komatsuda, and Y. Ohkubo
    • Journal Title

      Hyperfine Interactions

      Volume: 221 Issue: 1-3 Pages: 79-84

    • DOI

      10.1007/s10751-012-0709-1

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Atmosphere Dependence of Local Structures Formed by Al and In Impurities in Zinc Oxide2014

    • Author(s)
      S. Komatsuda, W. Sato, and Y. Ohkubo
    • Organizer
      The 5th Joint International Conference on Hyperfine Interactions and Symposium on Nuclear Quadrupole Interactions (HFI/NQI 2014)
    • Place of Presentation
      Canberra, Australia
    • Year and Date
      2014-09-21 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] Atomic Level Observation of Ag-ion Hopping Motion in AgI Nanoparticles2014

    • Author(s)
      W. Sato, R. Mizuuchi, N. Irioka, S. Komatsuda, S. Kawata, A. Taoka, and Y. Ohkubo
    • Organizer
      The 5th Joint International Conference on Hyperfine Interactions and Symposium on Nuclear Quadrupole Interactions (HFI/NQI 2014)
    • Place of Presentation
      Canberra, Australia
    • Year and Date
      2014-09-21 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] 不純物AlとInをドープしたZnO中の酸素空孔形成エネルギーの決定2014

    • Author(s)
      小松田沙也加、佐藤渉、大久保嘉高
    • Organizer
      2014日本放射化学会年会・第58回放射化学討論会
    • Place of Presentation
      愛知県 名古屋市
    • Year and Date
      2014-09-11 – 2014-09-13
    • Related Report
      2014 Annual Research Report
  • [Presentation] 超イオン伝導体ヨウ化銀中の111Agのダイナミクス2014

    • Author(s)
      佐藤渉、水内理映子、入岡奈津美、小松田沙也加、川田知、田岡東、大久保嘉高
    • Organizer
      2014日本放射化学会年会・第58回放射化学討論会
    • Place of Presentation
      愛知県 名古屋市
    • Year and Date
      2014-09-11 – 2014-09-13
    • Related Report
      2014 Annual Research Report
  • [Presentation] Thermal Stability of Locally-Associated Al and In Impurities in Zinc Oxide2013

    • Author(s)
      S. Komatsuda, W. Sato, and Y. Ohkubo
    • Organizer
      The fifth international symposium in the series of Asia- Pacific Symposium on Radiochemistry (APSORC 13)
    • Place of Presentation
      Kanazawa-shi, Ishikawa
    • Year and Date
      2013-09-22 – 2013-09-27
    • Related Report
      2013 Annual Research Report
  • [Presentation] Local Structure at the In Impurity Site in ZnO Probed by the TDPAC Technique2013

    • Author(s)
      W. Sato, S. Komatsuda, Y. Yamada, and Y. Ohkubo
    • Organizer
      The fifth international symposium in the series of Asia- Pacific Symposium on Radiochemistry (APSORC 13)
    • Place of Presentation
      Kanazawa-shi, Ishikawa
    • Year and Date
      2013-09-22 – 2013-09-27
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Dynamic Perturbation to 111Cd(←111Ag) Doped in AgI Nanoparticles2013

    • Author(s)
      W. Sato, R. Mizuuchi, N. Irioka, S. Komatsuda, S. Kawata, A. Taoka, and Y. Ohkubo
    • Organizer
      The fifth international symposium in the series of Asia- Pacific Symposium on Radiochemistry (APSORC 13)
    • Place of Presentation
      Kanazawa-shi, Ishikawa
    • Year and Date
      2013-09-22 – 2013-09-27
    • Related Report
      2013 Annual Research Report

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Published: 2014-01-29   Modified: 2024-03-26  

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