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Precise measurement of diffusion coefficient in semiconductor melt under strong magnetic field

Research Project

Project/Area Number 13650806
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionThe Institute of Space and Astronautical Science

Principal Investigator

INATOMI Yuko  The Institute of Space and Astronautical Science, Space Utilization Research Center, Associate Professor, 宇宙基地利用研究センター, 助教授 (50249934)

Co-Investigator(Kenkyū-buntansha) KURIBAYASHI Kazuhiko  The Institute of Space and Astronautical Science, Research Division for Space Transportation, Professor, 宇宙輸送研究系, 教授 (70092195)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2002: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsDiffusion coefficient / Strong magnetic field / Convection / Semiconductor melt / Space experiment / Hard sphere model / In-Sn / Ga-doped Ge
Research Abstract

In the present study, diffusion coefficients in semiconductor melt were measured precisely by utilization of a strong static magnetic field from the melting point of the specimen to 1500 K and then the measured data were compared with those obtained in the microgravity environment and with the estimated values by a hard sphere model.
Some experimental conditions for diffusion experiment in a static magnetic field were derived by a numerical simulation based of a fine element method. Based on the numerical result, the diffusion experiments for In-Sn, Ga-doped Ge, Ge-Si and In_*Ga_<1*>As melts were performed using an image furnace in a static magnetic field. The obtained results for the inter-diffusion coefficients were as follows.
1. InSn : The obtained coefficients near the melting point agreed well with those estimated by a hard sphere model However, the temperature dependency of the experimental values at high temperature was almost same as the space experiment result. The physical model for diffusion process in a so-called "simple liquid" should be modified based on the experimental data obtained in higher temperature.
2. Ga-doped Ge and Ge-Si : The obtained coefficients were much higher than those estimated by the hard sphere model. The results supports validity of the Itami's model which assumes molten Ge has a structure with a weak covalent bonding between the molecules.
3. In_*Ga_<1*>As : No reliable data was obtained by the present method due to the segregation of the solute species, because die segregation coefficient was large in the pseude-binary phase diagram. A shear cell method with an application of strong static magnetic field is a promising way to improve reliability of the experimental data in the case of alloy with a large segregation coefficient.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] T.Miyake, Y.Inatomi, K.Kuribayash: "Measurement of Diffusion Coeffcient in Molten In-Sn undcr Static Magnetic Field"Proc. 2nd China-Germany Workshop on Microgravity Sciences. 112-119 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Miyake, Y.Inatomi, K.Kuribayash: "Measurement of Diffusion Coefficient in Liquid Metal under Static Magnetic Field"Japanese Journal of Applied Physics. 41. L811-L813

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Miyake, Y.Inatomi, K.Kuribayash: "Interdiffusion coefficient of liquid In-Sn under hight magnetic field"Transactions of the Meaterials Research Society of Japan. 27. 751-753

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Miyake, Y. Inatomi and K.Kuribayash: "Interdiffusion coefficient of liquid In-Sn under night magnetic field"Transactions of the Meaterials Research Society of Japan. 27. 751-753 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Miyake, Y, Inatorai and K.Kuribayash: "Measurement of Diffusion Coefficient in Liquid Metal under Static Magnetic Field"Japanese Journal of Applied Physics. 41. L811-L813 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T. Miyake, Y. Inatomi and K.Kuribayash: "Measurement of Diffusion Coeffcient in Molten In-Sn under Static Magnetic Field"Proc. 2nd China-Germany Workshop on Microgravity Sciences. 119-112 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Miyake, Y.Inatomi, K.Kuribayash: "Measurement of Diffusion Coeffcient in Molten In-Sn under Static Magnetic Field"Proc. 2nd China-Germany Workshop on Microgravity Sciences. 119-112 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Miyake, Y.Inatomi, K.Kuribayash: "Measurement of Diffusion Coefficient in Liquid Metal under Static Magnetic Field"Japanese Journal of Applied Physics. 41. L811-L813 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Miyake, Y.Inatomi, K.Kuribayash: "Interdiffusion coefficient of liquid In-Sn under hight magnetic field"Transactions of the Meaterials Research Society of Japan. 27. 751-753 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Takuma Miyake, Yuko Inatomi, Kazuhiko Kuribayashi: "Interdiffusion coefficient of liquid In-Sn under high magnetic field"Transactions of the Materials Research Society of Japan. (印刷中).

    • Related Report
      2001 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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