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Non-equilibrium phase formation by 3MV electron irradiation

Research Project

Project/Area Number 09450237
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals
Research InstitutionOsaka University

Principal Investigator

MORI Hirotaro  Research Center for Ultra-High Voltage., 超高圧電子顕微鏡センター, 教授 (10024366)

Co-Investigator(Kenkyū-buntansha) YASUDA Hidehiro  Electron Microscopy, Osaka University, Professor, 超高圧電子顕微鏡センター, 助手 (60210259)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥10,400,000 (Direct Cost: ¥10,400,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1997: ¥8,700,000 (Direct Cost: ¥8,700,000)
Keywordshigh energy electron beam / radiation effect / non-equilibrium phase / high-voltage electron microscope / semiconducting compaund
Research Abstract

Single crystals of Ill-V semiconductor compounds such as GaAs, GaSb and InAswere irradiated with 2 MeV electrons in a ultra-high voltage electron microscope. Electron irradiation first induces chemical disordering and with continued irradiation topological disordering sets in. The chemical disordering becomes more difficult to occur with increasing irradiation temperature and as a result of this the topological disordering is completely suppressed. The topologically- and chemically-disordered phases formed at low temperatures become unstable at 300 K, and as a result change into the chemically-disordered and ordered phases, respectively. In the zincblende structure, the charge distribution is unbalanced and the lattice is distorted with increasing the degree of chemical disorder. It is considered that the crystalline state transforms to the topologically-disordered states (i.e., an amorphous state) to relax the instability of chemical bonds.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] H.Yasuda: "Electron-irradiation-induced chemical disordering and crystalline-to-amorphous transition in GaSb" Proc.14th International Congress on Electron. I. 291-292 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] D.Zhang: "Radiation induced phase charge in FeRh alloy studied by HVEM" Proc.14th International Congress on Electron Microscopy. I. 295-296 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Awaji: "Recoil implantation of Pb atoms into Almatrix by MeV electron irradiation" Proc.14th International Congress on Electron Microscopy. I. 277-278 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Yasuda: "Chemical disordering and crystalline-to-amorphous transition induced-by MeV electron irradiation in GaAs" Journal of Electron Microscopy. (印刷中). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Mori: "In-situ experiment with high voltage electron microscope" Materials Transactions,JIM. 39. 959-966 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Mori: "In-situ experiment with high voltage electron microscope" Mater.Trans.JIM. 39. 959 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Yasuda, H.Mori and K.Kinoshita: "Electron-irradiation-induced chemical disordering and crystalline-to-amorphous transition in GaSb" Proc.14th International Cong.on Electron Microscop. I. 291 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] D : Zhang, H.Yasuda, T.Sakata, R.Oshima and H.Mori: "Radiation induced phase change in FeRh alloy studied by HVEM" Proc.14th International Cong.on Electron Microscop. I. 295 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Awaji, H.Yasuda, M.Kasaya and H.Mori: "Recoil implantation of pb atoms into Al matrix by MeV electron irradiation" Proc.14th International Cong.on Electron Microscop. I. 277 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Yasuda and H.Mori: "Chemical disordering and cryatalline-to-amorphons transition induced by MeV electron irradiation" J.Electron Microscopy. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Yasuda: "Electron-irradiation-induced chemical disordering and crystalline-to amorphous transition in GaSb" Proc.14th International Congress on Electron Microscopy. I. 291-292 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] D.Zhang: "Radiation induced phase change in FeRh alloy studied by HVEM" Proc.14th International Congress on Electron Microscopy. I. 295-296 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Awaji: "Recoil implantation of Pb atoms into Al matrix by MeV electron irradiation" Proc.14th International Congress on Electron Microscopy. I. 277-278 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Yasuda: "Chemical disordering and crystalline-to-amorphous transition induced by MeV electron irradiation in GaAs" Journal of Electron Microscopy. (発表予定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Mori: "Topics in in-situ experiments with the HVEM at Osaka University" Journal of Surface Analysis. 3. 191-196 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Mori: "Electromigration in layered Al.lines studied by in-situ ultra-high voltage electron microscopy" Thin Solid Films. 300. 25-29 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Yasuda: "Spontaneous alloying and crystalization in nanomater sized amorphous antimony clusters" Thin Solid Films. 298. 143-146 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Yasuda: "Spontaneous alloying of gold clusters into nanometer-sized antimo clastors" Zeitschrift fur Physik D. 40. 140-143 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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