• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Structures and Magnetic Properties of Iron Nano-Crystals Embedded in Ceramic Glass Films

Research Project

Project/Area Number 07455259
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

HIROTSU Yoshihiko  Osaka University, Inst.of Sci.& Ind.Res., Res Professor, 産業科学研究所, 教授 (70016525)

Co-Investigator(Kenkyū-buntansha) BIAN Bo  Osaka University, Inst.of Sci.& Ind.Res., Associate, 産業科学研究所, 助手 (80283810)
OHKUBO Tadakatsu  Osaka University, Inst.of Sci.& Ind.Res., Associate, 産業科学研究所, 助手 (00242462)
NAKATA Yoshiyuki  Osaka University, Inst.of Sci.& Ind.Res., Res Associate, 産業科学研究所, 助手 (40164214)
ISHIGURO Takashi  Nagaoka Univ.of Technol., Dept.of Electr.Res Eng., Assoc.Professor, 工学部, 助教授 (10183162)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥6,900,000 (Direct Cost: ¥6,900,000)
KeywordsIron nano-crystal / structural morphology / ceramics matrix / TEM observation / magnetic property / tunneling magnetic resistance / transfer chamber / ナノ結晶軟磁性 / 磁性粒子 / 粒子構造 / 高分解能電子顕微鏡 / ナノビーム解析
Research Abstract

In recent years nano-granular magnetic particles embedded in insulating matrix has been attracting much interest, because of the appearance of spin-related magnetic resistance (MR) effect called "tunneling-type MR effect". However, little investigations have been made which relate nano-structures and morphologies of the magnetic particles, such as crystal structure, orientation, size, average inter-particle distance and distribution of magnetic particles, to magnetic interactions between the particles and their magnetic properties.
In the present study, (1) Fe and Co nano-particles were deposited onto insulating Al_2O_3 films by electron-beam evaporation under various substrate temperatures and evaporation conditions. And their magnetic properties were discussed on the basis of structures and morphologies of the nanogranular films observed by electron microscopy. Also in this study, (2) a "transfer-chamber" was manufactured which transfers nano-granular films formed in an evaporation chamber directly into an electron microscope without specimen oxidation or contamination in air.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] B.Bian, Y.Hirotsu, A.Makino: "Microstructure and magnetic property of Fe-Al2O3 granular films" Nanostructured Materials. in press. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Asaka, T.Tadaki, Y.Sechi, B.Bian, T.Ohkubo, Y.Hirotsu: "TEM and electron diffraction on stracture and phase transformation of nanometer-sized Fe-Ni alloy particle" Proceedings of Pacific RIM. in press. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tadaki, T.Kinoshita, Y.Nakata, T.Ohkubo, Y.Hirotsu: "Monte carlo simulation of order-disorder transformation in nano-particles of Cu_3Au alloy" Zeitschrift fur Physik. D40. 493-495 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tadaki, Y.Murai, A.Koreeda, Y.Nakata, Y.Hirotsu: "Structure and phase transformation of nano-scale particles of Fe-Ni alloys" Materials Science and Engineering. A217/218. 235-8 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] B.Bian, Y.Hirotsu, A.Makino: "Microstructure and magnetic property of Fe-Al203 granular films" Nanostructured Materials. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Asaka, T.Tadaki, Y.Sechi, B.Bian, T.Ohkubo, Y.Hirotsu: "TEM and electron diffraction on stracture and phase transformation of nanometer-sized Fe-Ni alloy particle" Proc.pacific RIM. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tadaki, T.Kinoshita, Y.Nakata, T.Ohkubo, Y.Hirotsu: "Monte carlo simulation of order-disorder transformation in nano-particles of Cu3Au alloy" Z.Phys.D. 40. 493-495 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Tadaki, Y.Murai, A.Koreeda, Y.Nakata, Y.Hirotsu: "Structure and phase transformation of nano-scale particles of Fe-Ni alloys" Mater.Sci.Eng.A217/218. 235-8 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Mitsuhide Matsushita: "Application of Nano-Diffraction to Local Structure Analysis of Amorphous Pd_<75>Si_<25> Alloy thin Films" Journal of Electron Microscopy. 45. 105-112 (1996)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1995-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi