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Three-dimensional Reconstruction of Micromagnetic Stray Fields by Using Tomographic technique.

Research Project

Project/Area Number 62550281
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 電子機器工学
Research InstitutionNagaoka University of Technology

Principal Investigator

MATSUDA Jin-ichi  Professor of Nagaoka University of Technology, 工学部, 教授 (30029087)

Co-Investigator(Kenkyū-buntansha) KATOH Kazuo  Assistant of Nagaoka University of Technology, 工学部, 教務職員 (80115104)
HIROTU Yoshihiko  Associate Professor of Nagaoka University of Technology, 工学部, 助教授 (70016525)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1988: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1987: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordsthree-dimensional reconstruction of magnetic field / stray magnetic field / electron beam deflection / 空間可変重み付け反復法
Research Abstract

Recently, the measurements of three-dimensional distribution of microstray magnetic fields of order have been important especially in the fields of thin film magnetic head design and its ecaluation of electrical characteristics. We have studied a three-dimensional reconstruction of stray magnetic fields by using a tomographic technique for two years. This report is the summary of our research project, and which consists of six chapters. In chapter 2, a new non-linear reconstruction algorithm based on the art methods is described.
In chapter 3, a newly deceloped measurement setup for electron beam tomography is described. The main specifications are as follows; the spatial resolution of a magnetic field is nearly submicron ,and the resolution of a magnetic field is a several gauss.
In chapter 4, Computer simulations for testing of our non-linear reconstruction argorithm with a model example of one-turn coil is described. From these results,it is shown that the original magnetic fields can be reconstructed in accuracy of nearly 10% using our three-dimensional reconstruction argorithm.
In chapter 5, experimental results of the one turn coil which is a similar model as in the computer simulations,and also of a diuble gap magnetic erasing head are described. From these results, we can also confirm experimentally that both these original magnetic fields can be reconstructed in accuracy of nearly 10%.
The chapter 6 is a summary and an applicability of our method to electron beam tomography is demonstrated.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Y.Hirotsu,et al.: Jpn.J.Apple.Phys.26. 685-687 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N.Yamamoto;Y.Hirotsu,et al.: J.Electron Microsc.36. 256-260 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] J.Matsuda: J.Apple.Phys.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] J. Matsuda: "Reconstruction of Three-Dimensional Micromagnetic Stray Fields by Electron-Beam Tomography" J. Appl. Phys.Submitted.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y. Hirotsu et al.: "Electron Diffraction and Microscopy of the Structures of La-Ba(Sr)-Cn Oxides at Liquid Helium Temperature" Jpn. J. Appl. Phys.26. 685-687 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] N. Yamamoto, Y. Hirotsu et al.: "Structure of the Magnetic Superconductor GdBa2Cu307- at Various Temperatures Studied by Electron Microscopy" J. Electron Microsc.36. 256-260 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y.Hirotsu et al.: Jpn.J.Appl.Phys.26. 685-687 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] N.Yamaoto;Y.Hirotsu et al: J.Electron Micrlsc.36. 256-260 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] J.Matsuda: J.Appl.Phys.

    • Related Report
      1988 Annual Research Report
  • [Publications] 青柳欽也: 電子情報通信学会信越支部大会講演論文集. (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 森義彦: 第48回応用物理学会学術講演会講演予稿集. (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 井村博徳: 電子情報通信学会信越支部大会講演論文集. (1987)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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