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2012 Fiscal Year Annual Research Report

磁気力顕微鏡による記録媒体磁化状態変化の高分解能観察およびデータ解析に関する研究

Research Project

Project/Area Number 22560302
Research InstitutionChuo University

Principal Investigator

二本 正昭  中央大学, 理工学部, 教授 (70384732)

Project Period (FY) 2010-04-01 – 2013-03-31
Keywords磁気力顕微鏡 / 磁気記録媒体 / 磁化状態 / 観察分解能 / パターンメディア
Research Abstract

平成24年度は、公布申請書記載の当初の目的(1) 1 Tb/in2以上の磁気記録媒体およびパターンメディアの磁化状態観察、に加えて、(2)観察分解能8 nm以下の実現、(3)探針の反転磁界計測技術の開発と1 kOe以上の高反転磁界の開発指針明確化、を目標に研究を推進し、以下の実績を得た。
(1)1 Tb/in2以上の磁化状態観察:1 Tb/in2は矩形状ビットでは25 nm x 25 nmとなる。本研究で開発した観察分解能8 nm以下のMFM探針を垂直磁気記録媒体とビットパターンメディアに適用し、1500 kFCI(ビット長:16.7 nm)の記録磁化状態と18 nm x 18 nm (2 Tb/in2)のビットパターンメディアの磁性ドット垂直磁化状態が分離して観察できることを確認した。これらの結果を国際会議(PRiME-2012, APMRC-2012)の招待講演で発表し、論文として公開した。
(2)観察分解能8 nm以下の実現:Siベース探針上に被覆する磁性材料と膜厚を検討し、CoおよびFeCo合金を20 nm厚被覆して作成したMFM探針の分解能で研究目標を超える7.5 nmおよび6.6 nmの分解能を得た。
(3)反転磁界計測技術の開発と1 kOe以上の反転磁界実現指針:既開発済の「同一個所の繰り返し高分解能観察技術」とMFM探針の磁界処理技術を組み合わせることにより、0.05 kOe精度で探針の反転磁界を決定する技術を開発した。この技術を用いて被覆磁性膜材料と膜厚が反転磁界に及ぼす影響を検討し、高磁気異方性を持つL10-FePd合金、L11-CoPt合金などを最適化された条件で被覆することにより、10 nm以下の高分解能と1 kOe以上の高反転磁界を達成できることを明らかにした。

Current Status of Research Progress
Reason

24年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

24年度が最終年度であるため、記入しない。

  • Research Products

    (23 results)

All 2013 2012 Other

All Journal Article (11 results) (of which Peer Reviewed: 10 results) Presentation (11 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] Development of thin film technology for high-density magnetic recording media2013

    • Author(s)
      Masaaki Futamoto
    • Journal Title

      ECS Transactions

      Volume: vol.50 Pages: 79-90

    • Peer Reviewed
  • [Journal Article] Fabrication of magnetic tips for high-resolution magnetic force microscopy2013

    • Author(s)
      Masaaki Futamoto, Tatsuya Hagami, Shinji Ishihara, Kazuki Soneta, and Mitsuru Ohtake
    • Journal Title

      Key Engineering Materials

      Volume: vol.543 Pages: 35-38

    • Peer Reviewed
  • [Journal Article] Effect of annealing temperature on the switching field of magnetic force microscope tip coated with FePd-alloy thin film2013

    • Author(s)
      Shinji Ishihara, Tatsuya Hagami, Kazuki Soneta, Mitsuru Ohtake, and Masaaki Futamoto
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: vol.37 Pages: 56-61

    • Peer Reviewed
  • [Journal Article] Improvement of magnetic force microscope resolution and application to high-density recording media2013

    • Author(s)
      Masaaki Futamoto, Tatsuya Hagami, Shinji Ishihara, Kazuki Soneta, and Mitsuru Ohtake
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 未定 Pages: 未定

    • Peer Reviewed
  • [Journal Article] Preparation of high-resolution magnetic force microscope tips coated with Co and FeCo films2013

    • Author(s)
      Tatsuya Hagami, Kazuki Soneta, Mitsuru Ohtake, and Masaaki Futamoto
    • Journal Title

      EPJ Web of Conference

      Volume: 40 Pages: 01002-1-.4

    • DOI

      DOI: 10.1051/epjconf/20134001002

    • Peer Reviewed
  • [Journal Article] Spatial resolution and switching field of magnetic force microscope tip coated with FePd-alloy thin film2013

    • Author(s)
      Shinji Ishihara, Mitsuru Ohtake, and Masaaki Futamoto
    • Journal Title

      EPJ Web of Conference

      Volume: 40 Pages: 08003-p.1-4

    • DOI

      DOI: 10.1051/epjconf/20134008003

    • Peer Reviewed
  • [Journal Article] Magnetic force microscope tip with high resolution and high switching field prepared by coating Si tip with L11 ordered CoPt-alloy film2013

    • Author(s)
      Shinji Ishihara, Mitsuru Ohtake, and Masaaki Futamoto
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: 未定 Pages: 未定

    • Peer Reviewed
  • [Journal Article] High-resolution magnetic force microscope tip coated with Co film prepared by ultra-high vacuum evaporation2013

    • Author(s)
      Tatsuya Hagami, Mitsuru Ohtake, and Masaaki Futamoto
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: 未定 Pages: 未定

    • Peer Reviewed
  • [Journal Article] Magnetic force microscope tips prepared by coating sharp Si-base tips with thin Co films2013

    • Author(s)
      Kazuki Soneta, Mitsuru Ohtake, and Masaaki Futamoto
    • Journal Title

      Journal of the Magnetics Society of Japan

      Volume: 未定 Pages: 未定

    • Peer Reviewed
  • [Journal Article] Read/write characteristics of a new type of bit-patterned-media using nano-patterned glassy alloy2012

    • Author(s)
      Kana Takenaka, Noriko Saidoh, Nobuyuki Nishiyama, Manabu Ishimaru, Masaaki Futamoto, and Akihisa Inoue
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 324 Pages: 1444-1448

    • DOI

      doi.org/10.1016/j.jmmm.2011.12.009

    • Peer Reviewed
  • [Journal Article] L10およびL11規則合金膜を被覆した磁気力顕微鏡探針の空間分解能と反転磁界2012

    • Author(s)
      石原慎司、大竹 充、二本正昭
    • Journal Title

      信学技報

      Volume: MR2012-7 Pages: 35-42

  • [Presentation] Fabrication of magnetic tips for high-resolution magnetic force microscopy

    • Author(s)
      Masaaki Futamoto, Tatsuya Hagami, Shinji Ishihara, Kazuki Soneta, and Mitsuru Ohtake
    • Organizer
      2nd International Conference on Materials and Applications for Sensors and Transducers (IC-MAST-2012)
    • Place of Presentation
      Budapest, Hungary
  • [Presentation] Development of thin film technology for high-density magnetic recording media

    • Author(s)
      Masaaki Futamoto
    • Organizer
      Pacific Rim Meeting on Electrochemical and Solid-State Science (PRiME-2012)
    • Place of Presentation
      Honolulu, Hawai, USA
    • Invited
  • [Presentation] Improvement of magnetic force microscope resolution and application to high-density recording media

    • Author(s)
      Masaaki Futamoto, Tatsuya Hagami, Shinji Ishihara, Kazuki Soneta, and Mitsuru Ohtake
    • Organizer
      Asia-Pacific Magnetic Recording Conference 2012
    • Place of Presentation
      Singapore
    • Invited
  • [Presentation] L10およびL11規則合金膜を被覆した磁気力顕微鏡探針の空間分解能と反転磁界

    • Author(s)
      石原慎司、大竹 充、二本正昭
    • Organizer
      電子情報通信学会 磁気記録・情報ストレージ研究会
    • Place of Presentation
      東北大学、仙台
  • [Presentation] Magnetic force microscope tips coated with L10 ordered FePd, FePt, and CoPt alloy films

    • Author(s)
      Shinji Ishihara, Mitsuru Ohtake, and Masaaki Futamoto
    • Organizer
      International Union of Materials Research Society International Conference in Asia 2012 (IUMRS-ICA 2012)
    • Place of Presentation
      Busan, Korea
  • [Presentation] Spatial resolution and switching field of magnetic force microscope tip coated with FePd-alloy thin film

    • Author(s)
      Shinji Ishihara, Mitsuru Ohtake, and Masaaki Futamoto
    • Organizer
      Joint European Magnetic Symposia 2012
    • Place of Presentation
      Parma, Italy
  • [Presentation] Preparation of high-resolution magnetic force microscope tips coated with Co and FeCo films

    • Author(s)
      Tatsuya Hagami, Kazuki Soneta, Mitsuru Ohtake, and Masaaki Futamoto
    • Organizer
      Joint European Magnetic Symposia 2012
    • Place of Presentation
      Parma, Italy
  • [Presentation] Magnetic force microscope tip with high resolution and high switching field prepared by coating Si tip with L11 ordered CoPt-alloy film

    • Author(s)
      Shinji Ishihara, Mitsuru Ohtake, and Masaaki Futamoto
    • Organizer
      The 2nd International Conference of Asia Union of Magnetics Societies (ICAUMS 2012)
    • Place of Presentation
      Nara, Japan
  • [Presentation] High-resolution magnetic force microscope tip coated with Co film prepared by ultra-high vacuum evaporation

    • Author(s)
      Tatsuya Hagami, Mitsuru Ohtake, and Masaaki Futamoto
    • Organizer
      The 2nd International Conference of Asia Union of Magnetics Societies (ICAUMS 2012)
    • Place of Presentation
      Nara, Japan
  • [Presentation] Magnetic force microscope tips prepared by coating sharp Si-base tips with thin Co films

    • Author(s)
      Kazuki Soneta, Mitsuru Ohtake, and Masaaki Futamoto
    • Organizer
      The 2nd International Conference of Asia Union of Magnetics Societies (ICAUMS 2012)
    • Place of Presentation
      Nara, Japan
  • [Presentation] Co/Pd多層膜被覆した磁気力顕微鏡探針の空間分解能と反転磁界

    • Author(s)
      鈴木 遼、そね田 和希、石原 慎司、葉上 達也、大竹 充、二本 正昭
    • Organizer
      第60回応用物理学会春季学術講演会
    • Place of Presentation
      神奈川工科大学、厚木
  • [Remarks] Futamoto Laboratory

    • URL

      http://www.elect.chuo-u.ac.jp/futamoto/

URL: 

Published: 2014-07-24  

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