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2008 Fiscal Year Final Research Report

Fabrication of Hard Magnetic Alloy Nanoparticles by Vapor-Deposition and Their Electron Diffraction Structure Analysis and Magnetic Property Measurements

Research Project

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Project/Area Number 16106008
Research Category

Grant-in-Aid for Scientific Research (S)

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

Principal Investigator

HIROTSU Yoshihiko  Osaka University, 産業科学研究所, 招へい教授 (70016525)

Co-Investigator(Kenkyū-buntansha) SATO Kazuhisa  東北大学, 金属材料研究所, 助教 (70314424)
ISHIMARU Manabu  大阪大学, 産業科学研究所, 准教授 (00264086)
HIRATA Akihiko  大阪大学, 産業科学研究所, 助教 (90350488)
MAKINO Akihiro  東北大学, 金属材料研究所, 教授 (30315642)
Project Period (FY) 2004 – 2008
KeywordsL10型規則合金 / 硬質磁性ナノ粒子 / 方位配向 / 2次元孤立分散 / 超常磁性臨界サイズ / 規則不規則変態 / 規則度 / ナノビーム電子回折
Research Abstract

L10-Fe系規則合金ナノ粒子の粒子サイズ分散の少ないナノ粒子膜を合成し、硬質磁気特性が得られる臨界粒子サイズと規則構造形成臨界サイズとの相関を詳細に調べ、超高密度磁気記録媒体材料への応用に必要となる知見を得た。また、この種のL10-ナノ粒子分散膜の低温合成、垂直磁化膜の合成などの成果も得られた。

  • Research Products

    (39 results)

All 2009 2008 2007 2006 2005 2004

All Journal Article (26 results) Presentation (12 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Electron microscopy study of L10-FePtCu nanoparticles synthesized at 613 K2009

    • Author(s)
      Y. Hirotsu, H. W. Ryu, K. Sato, and M. Ishimaru
    • Journal Title

      J. Microscopy (in press)

  • [Journal Article] Atomic structure imaging of L10-type FePd nanoparticles by spherical aberration corrected high-resolution transmission electron microscopy2009

    • Author(s)
      K. Sato, T. J. Konno, and Y. Hirotsu
    • Journal Title

      J. Appl. Phys 105(3)

      Pages: 1-034308

  • [Journal Article] Structural and magnetic properties of L10-FeCoPt nanoparticles prepared by rf-sputtering2008

    • Author(s)
      A. Kovacs and Y. Hirotsu
    • Journal Title

      Applied Physics A 93(2)

      Pages: 543-547

  • [Journal Article] Fabrication of L10-FeCoPd nanocrystalline particles with tilted magnetic easy axis2008

    • Author(s)
      A. Kovacs and Y. Hirotsu
    • Journal Title

      Appl. Phys. Lett 91(19)

      Pages: 193106_1-193106_3

  • [Journal Article] High-resolution transmission electron microscopy analysis of L10 ordering process in Fe/Pd thin layers2007

    • Author(s)
      A. Kovacs, K. Sato and Y. Hirotsu
    • Journal Title

      J. Appl. Phys 102(12)

      Pages: 123512_1-123512_4

  • [Journal Article] Low-Temperature Atomic Ordering of Oriented L10-FePtCu Nanoparticles with High Areal-Density Characterized by Transmission Electron Microscopy and Electron Diffraction2007

    • Author(s)
      H. W. Ryu, K. Sato and Y. Hirotsu
    • Journal Title

      Mater. Trans 48(5)

      Pages: 903-908

  • [Journal Article] Improvement of Structural and Magnetic Properties of L10-FePd nanocrystals by Co addition2007

    • Author(s)
      A. Kovacs, K. Sato and Y. Hirotsu
    • Journal Title

      IEEE Trans. Magn 43(6)

      Pages: 3097-3099

  • [Journal Article] Particle size dependence of atomic ordering and magnetic properties of L10-FePd nanoparticles2007

    • Author(s)
      H. Naganuma, K. Sato and Y. Hirotsu
    • Journal Title

      J. Magn. Magn. Mater 310(2)

      Pages: 2356-2358

  • [Journal Article] Magnetic properties and microstructure of FePt-M-B(M=Zr, Nb, La) films2007

    • Author(s)
      H. Okumura, S. Nishinakagawa, T. Bitoh, A. Makino, K. Sato and Y. Hirotsu, J. Magn
    • Journal Title

      Magn. Mater 310(2)

      Pages: 2527-2528

  • [Journal Article] Strong perpendicular magnetic anisotropy of Fe-Pd nanocrystalline particles enhanced by Co addition2007

    • Author(s)
      A. Kovacs, K. Sato
    • Journal Title

      J.Appl. Phys 101(3)

      Pages: 033910_1-033910_4

  • [Journal Article] Low-temperature synthesis of oriented L10-FePtCu nanoparticles with high coercivity2007

    • Author(s)
      H. W. Ryu, K. Sato and Y. Hirotsu
    • Journal Title

      Solid State Phenomena 124-126, 855-858

  • [Journal Article] Direct synthesis of isolated L10-FePtCu nanoparticles by rf-magnetron sputtering2007

    • Author(s)
      H. W. Ryu, K. Sato and Y. Hirotsu
    • Journal Title

      Phenomena 127

      Pages: 129-133

  • [Journal Article] Structure and magnetic properties of nanocrystalline Pd-Co and Pd-Co-Fe layers2007

    • Author(s)
      A. Kovacs, K. Sato and Y. Hirotsu
    • Journal Title

      Solid State Phenomena 124-126

      Pages: 907-910

  • [Journal Article] Magnetic Properties and Structure of Fe-Pt-M-B (M=Zr, Nb and Ti) Alloys Produced by Quenching Technique2007

    • Author(s)
      A. Makino, T. Bitoh, A. Inoue and Y. Hirotsu
    • Journal Title

      J. Alloys and Comp 434-435

      Pages: 614-617

  • [Journal Article] Melt-Spun L10 Fe-Pt-(Zr, Nb and Ti)-B Nanocrystalline Alloys with High Coercivity2007

    • Author(s)
      A. Makino, T. Bitoh, A. Inoue and Y. Hirotsu
    • Journal Title

      Mater. Sci. Eng. A 449-451

      Pages: 66-70

  • [Journal Article] Fabrication of oriented L10-FeCuPd and composite bcc-Fe/L10-FeCuPd nanoparticles : alloy composition dependence of magnetic properties2006

    • Author(s)
      H. Naganuma, K. Sato and Y. Hirotsu
    • Journal Title

      J. Appl. Phys 99(8)

      Pages: 08N706_1-08N706

  • [Journal Article] Order-disorder transformation in L10-FePd nanoparticles studied by electron diffraction2006

    • Author(s)
      K. Sato and Y. Hirotsu
    • Journal Title

      Mater. Trans 47(1)

      Pages: 59-62

  • [Journal Article] Long-range order parameter of single L10-FePd nanoparticle determined by nanobeam electron diffraction : Particle size dependence of the order parameter2005

    • Author(s)
      K. Sato, Y. Hirotsu, H. Mori, Z. Wang and T. Hirayama
    • Journal Title

      J. Appl. Phys 98(2)

      Pages: 024308_1-024308_8

  • [Journal Article] Growth and atomic ordering of hard magnetic L10-FePt, FePd and CoPt alloy nanoparticles studied by transmission electron microscopy : alloy system and particle size dependence2005

    • Author(s)
      Y. Hirotsu and K. Sato
    • Journal Title

      J. Ceramic Processing Research 6(3)

      Pages: 236-244

  • [Journal Article] Determination of order parameter of L10-FePd nanoparticles by electron diffraction2005

    • Author(s)
      K. Sato, Y. Hirotsu, H. Mori, Z. Wang and T. Hirayama
    • Journal Title

      J. Appl. Phys 97(8)

      Pages: 084301_1-084301_7

  • [Journal Article] Two dimensionally dispersed Fe/FePd nanocomposite particles synthesized by electron beam deposition2005

    • Author(s)
      Y. Hirotsu, K. Sato and J. Kawamura, Mate
    • Journal Title

      Sci. Forum 502

      Pages: 275-280

  • [Journal Article] Order parameter analysis of L10-FePd particles by nano-beam electron diffraction2005

    • Author(s)
      K. Sato and Y. Hirotsu
    • Journal Title

      Archives of Materials Science 26(1-2)

      Pages: 17-23

  • [Journal Article] Structural characterization of oriented L10-FePd nanoparticles2004

    • Author(s)
      K. Sato and Y. Hirotsu
    • Journal Title

      Trans. Mater. Res. Soc. Jpn 29(4)

      Pages: 1647-1650

  • [Journal Article] Fabrication of exchange-coupled α-Fe/L10-FePd nanocomposite isolated particles2004

    • Author(s)
      J. Kawamura, K. Sato and Y. Hirotsu
    • Journal Title

      J. Appl. Phys 96(7)

      Pages: 3906-3911

  • [Journal Article] Magnetoanisotropy, long-range order parameter and thermal stability of isolated L10 FePt nanoparticles with mutual fixed orientation2004

    • Author(s)
      K. Sato and Y. Hirotsu
    • Journal Title

      J. Magn. Magn. Mater 272-276

      Pages: 1497-1499

  • [Journal Article] The investigation of multiply twinned L10-type FePt nanoparticles by transmission electron microscopy2004

    • Author(s)
      A. Kovacs, K. Sato, G. Safran, P. B. Barna and Y. Hirotsu
    • Journal Title

      Philos. Mag 84(20)

      Pages: 2075-2081

  • [Presentation] L10-structure formation of FePtCu nanoparticles at 613K uisng magnetron sputtering2008

    • Author(s)
      Y. Hirotsu, H. W. Ryu, K. Sato, M. Ishimaru
    • Organizer
      7th Polish-Japanese Joint Seminar on Micro and Nano Analysis
    • Place of Presentation
      Warsaw
    • Year and Date
      20080907-10
  • [Presentation] Long-range order structure in L10-type FePd nanoparticles studied by HRTEM and electron diffraction2008

    • Author(s)
      K. Sato
    • Organizer
      Seminar : Oxford Materials Electron Microscopy & Microanalysis Group
    • Place of Presentation
      Hume-Rothery Lecture Theatre, University of Oxfor
    • Year and Date
      2008-09-08
  • [Presentation] Fabrication of oriented hard-magnetic alloy nanoparticles and their characterization2007

    • Author(s)
      Y. Hirotsu, K. Sato, A. Kovacs, H. Naganuma, H. W. Ryu
    • Organizer
      The 1st International Symposium on Advanced Magnetic Materials and Applications
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      20070528-0601
  • [Presentation] Atomic ordering and hard magnetic properties of L10-type FePtCu nanoparticles studied by transmission electron microscopy and electron diffraction2006

    • Author(s)
      Y. Hirotsu, H. W. Ryu, and K. Sato
    • Organizer
      6^<th> Japanese-Polish Joint Seminar on Materials Analysis-New developments and analysis for fabrication of functional nanostructure
    • Place of Presentation
      Tateyama-Toyama
    • Year and Date
      20060911-13
  • [Presentation] Effects of additive elements on atomic ordering and hard magnetic properties of L10-type FePt and FePd alloy nanoparticles2006

    • Author(s)
      Y. Hirotsu, K. Sato, H. W. Ryu and A. Kovacs
    • Organizer
      48^<th> IUVSTA Workshop, Innovatial Training Course on "Influence of Trace Elements on the Nucleation and Growth of Thin Films"
    • Place of Presentation
      Budapest, Hungary
    • Year and Date
      20060826-31
  • [Presentation] Fabrication and TEM characterization of hard magnetic ordered alloy nano-particles2005

    • Author(s)
      Y. Hirotsu and K. Sato
    • Organizer
      4^<th> 21^<st> Century COE "Towards Creating New Industries Based on Inter-Nanoscience" Int'l Symp
    • Place of Presentation
      Toba
    • Year and Date
      20051118-19
  • [Presentation] 電子回折によるL10型FePdナノ粒子の長範囲規則度とその粒径依存性2005

    • Author(s)
      佐藤和久
    • Organizer
      日本顕微鏡学会第50回シンポジウム
    • Place of Presentation
      九州大学
    • Year and Date
      2005-11-02
  • [Presentation] ナノビーム電子回折によるL10-FePdナノ粒子の長範囲規則度測定2005

    • Author(s)
      佐藤和久, 弘津禎彦
    • Organizer
      日本顕微鏡学会第61回学術講演会
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      2005-06-03
  • [Presentation] Two Dimensionally Dispersed Fe/FePd Nanocomposite Particles Synthesized by Electron Beam Deposition2004

    • Author(s)
      Y. Hirotsu, K. Sato and J. Kawamura
    • Organizer
      International Conference on New Frontiers of Process Science and Engineering in Materials Science (PSEA'04)
    • Place of Presentation
      Kyoto
    • Year and Date
      20041124-26
  • [Presentation] Growth and atomic ordering of hard magnetic L10-FePt, FePd and CoPt alloy nanoparticles studied by transmission electron microscopy2004

    • Author(s)
      Y. Hirotsu and K. Sato
    • Organizer
      2004 Fall Int'l Symposium on Crystal Growth and Devices
    • Place of Presentation
      Seoul, Korea
    • Year and Date
      20041110-13
  • [Presentation] Structure and metallurgy of alloy nanoparticles in Fe-Pd system2004

    • Author(s)
      Y. Hirotsu and K. Sato
    • Organizer
      L1_0 Ordered Intermetallic and Related Phases for Permanent Magnet and Recording Applications
    • Place of Presentation
      Copper Mountain, Colorado, USA
    • Year and Date
      20040815-20
  • [Presentation] Analysis of Oriented L10-FePt and FePd Nanoparticles2004

    • Author(s)
      Y. Hirotsu and K. Sato
    • Organizer
      日本応用磁気学会第28回学術講演会
    • Place of Presentation
      沖縄コンベンションセンター
    • Year and Date
      2004-09-21
  • [Patent(Industrial Property Rights)] 磁性体粒子及びその製造方法2006

    • Inventor(s)
      弘津禎彦、Andras Kovacs、佐藤和久
    • Industrial Property Number
      特許願特願2006-220037
    • Filing Date
      2006-08-11

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Published: 2010-06-10   Modified: 2016-04-21  

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