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Remote sensing of Induced Current in Magnetic Czochralski Crystal Growth

Research Project

Project/Area Number 09650012
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionYamanashi University

Principal Investigator

KASUGA Masanobu  Yamanashi University, Dept. Electronics, Professor, 工学部, 教授 (30023170)

Co-Investigator(Kenkyū-buntansha) 矢野 浩司  山梨大学, 工学部, 助手 (90252014)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1999: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsMagnetic Czochralski method / melt growth / eddy current / inverse problem / Biot-Savart Law / Joule's heat / remote sensing / infrared imaging / 渦電流 / 融液からの成長 / 磁場卯加 / 誘起電流 / 誘起磁場 / 非接触測定 / 運動導体 / ガリウム / ビオ・サバ-ルの法則
Research Abstract

(1) Establishment of the Measurement Principle
Based on Biot-Savart Law and the current induced by the movement of a conducting top in magnetic field, we have calculated the induced secondary magnetic field at arbitrary points outside of the top.
(2) Measurement of the Induced Field
Using solid gallium and liquid gallium as specimen materials, we have measured the induced magnetic field. Solid gallium made a symmetrical large field which is predicted by the theory involving shunt effect. But liquid gallium made a small, nonsymmetrical, complex field. which requires more comprehensive analysis.
(3) Measurement of Temperature Rising by the Joule's Heat
Since the estimation of the induced current through magnetic field is an inverse problem, we need another way of estimation to assure the uniqueness of the solution. As another approach we measured the surface temperature of the top with time by the infrared thermometer and compared the data with the electric current data. Both data coincide qualitatively. We are continuing more quantitative examination.
(4) Development in Future
By analyzing the saturation and the decrease effect of the induced current density with increasing applied magnetic field, we would understand the suppression mechanism of the flow by the magnetic field. We are also planning to catch the induced current more directly by probing the potential of the surface of rotating top and to calibrate the remote sensing data.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 春日正伸: "融液成長における磁場効果の考察"日本結晶成長学会誌. 24. 85 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Minegishi: "Growth of p-type Zinc Oxide Films Chemical Vapor Deposition"Japanese Journal of Applied Physics. 36. L1453-L1455 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Yoshioka: "Effects of impurities on Lateral growth of erystals"Journal of Cystal Growth. 198/199. 71-76 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Kasuga: "Effect of Magnetic Field on the Crystal Growth from Melt"J. of the Jpn. Assoc. for Crystal Growth (in Japanese). vol. 24, No. 2. 85 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Minegishi: "Growth of p-type Zinc Oxide Films by Chemical Transport Reaction"Jpn. J. Appl. Phys.. vol. 36, No. 11A. L1453-L1455 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y. Yoshioka: "Effects of impurities on lateral Growth of crystals"J. Crystal Growth. vol. 198/199. 71-76 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 春日正伸,宮澤靖人: "融液成長における磁場効果の考察"日本結晶成長学会誌. 24,2. 85-85 (1997)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Minegishi,Y.Koiwai,Y.Kikuchi K.Yano,M.Kasuga,A.Shimizu: "Growth of p-type Zinc Oxide Films by Chemical Vapor Deposition"Jpn. J. Appl. Phys.. 36,11A. L1453-L1455 (1997)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.Yoshioka,T.Matsui, M.Kasuga,T.Irisawa: "Effects of impurities on lateral growth of crystals"Journal of Crystal Growth. 198/199. 71-76 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 春日正伸・宮澤靖人: "融液成長における磁場効果の考案" 日本結晶成長学会誌. 24-2. 120 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Minegishi: "Growth of p-type Zinc Oxide Films by Chemical Vapor Deposition" Jpn.J.Appl.Phys.36. L1453-L1455 (1997)

    • Related Report
      1997 Annual Research Report

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

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