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2014 Fiscal Year Annual Research Report

次世代垂直磁気記録用高密度高周波記録ライトヘッドの提案

Research Project

Project/Area Number 24560425
Research InstitutionNiigata Institute of Technology

Principal Investigator

金井 靖  新潟工科大学, 工学部, 教授 (00251786)

Project Period (FY) 2012-04-01 – 2015-03-31
Keywords垂直磁気記録 / 記録ヘッド / マイクロマグネティック解析
Outline of Annual Research Achievements

1)計算システム(ハードウェア,ソフトウェア)
申請当初と比べ高性能の計算機が安価に購入可能となったため,3台目の計算機システムを導入することができた.自作プログラムに加え,市販プログラム(富士通,EXAMAG)も利用した.
2)次世代垂直磁気記録方式に対応した磁気記録ライトヘッドの提案
シングル磁気記録(shingled magnetic recording: SMR)と2次元磁気記録方式(two-dimensional magnetic recording: TDMR)を組み合わせた検討を進めた.リード素子を複数個使った読み出しに関わる信号処理が主な研究課題である.申請者は記録ヘッドを担当し,愛媛大学,シンガポールA*STARのDSI,また米国ASTCを通じた米国諸大学と共同で進めた.高周波アシスト磁気記録(microwave-assisted magnetic recording: MAMR)についてはライトヘッドのギャップ中に高周波を発生する素子(スピントルク発振素子:STO)を組み込んだ複合型ライトヘッドの計算が可能となった.STO単体および記録ヘッドに組み込んだ場合について材料と構造の両面から検討を進め,STOと記録ヘッドの相互作用により発振条件(材料,構造,電流密度)が厳しくなることを報告した.東北大学,九州大学,工学院大学と共同研究を進めている.熱アシスト磁気記録(thermally-assisted magnetic recording)は,東北大学,工学院大学と共同で研究を進め,高周波電流に対して最適な記録磁界を発生するための構造(ヨーク長を短くする,ヒートシンクを兼ねた軟磁性裏打層を配する,など)を提案,報告した.

  • Research Products

    (29 results)

All 2015 2014 Other

All Journal Article (9 results) (of which Peer Reviewed: 9 results,  Acknowledgement Compliant: 6 results) Presentation (19 results) (of which Invited: 2 results) Remarks (1 results)

  • [Journal Article] Bit error rate performance for head skew angle in shingled magnetic recording using dual reader heads2015

    • Author(s)
      Y. Nakamura, H. Osawa, Y. Okamoto, Y. Kanai, and H. Muraoaka
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Pages: 17A901 1-4

    • DOI

      10.1063/1.4906965

    • Peer Reviewed
  • [Journal Article] Micromagnetic model analysis of integrated single-pole-type head with tilted spin-torque oscillator for high-frequency microwave-assisted magnetic recording2015

    • Author(s)
      T. Katayama, Y. Kanai, K. Yoshida, S. Greaves, and H. Muraoka
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Pages: 17C503 1-4

    • DOI

      10.1063/1.4907328

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Modelling of heat assisted magnetic recording with the Landau-Lifshitz-Bloch equation and Brillouin functions2015

    • Author(s)
      S. J. Greaves, H. Muraoka, and Y. Kanai
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Pages: 17C505 1-4

    • DOI

      10.1063/1.4908025

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Micromagnetic model analysis of high frequency heat-assisted magnetic recording2015

    • Author(s)
      Y. Kanai, S. J. Greaves, K. Yoshida, and H. Muraoka
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Pages: 17C506 1-4

    • DOI

      10.1063/1.4908024

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Performance evaluation of signal dependent noise predictive maximum likelihood detector for two-dimensional magnetic recording read/write channel2015

    • Author(s)
      S. Kawamura, Y. Okamoto, Y. Nakamura, H. Osawa, Y. Kanai, and H. Muraoaka
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Pages: 17D112 1-3

    • DOI

      10.1063/1.4908145

    • Peer Reviewed
  • [Journal Article] Skew angle effects in shingled magnetic recording system with double/triple reader head array2014

    • Author(s)
      M. R. Elidrissi, K. S. Chan, S. Greaves, Y. Kanai, and H. Muraoka
    • Journal Title

      Journal of Applied Physics

      Volume: 115 Pages: 17B753 1-3

    • DOI

      10.1063/1.4869275

    • Peer Reviewed
  • [Journal Article] Shingled thermally assisted magnetic recording for 8 Tbit/in^22014

    • Author(s)
      S. J. Greaves, Y. Kanai, and H. Muraoka
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 50 Pages: 3001204 1-4

    • DOI

      10.1109/TMAG.2013.2283087

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Model analysis of magnetic write head for shingled thermally-assisted magnetic recording2014

    • Author(s)
      Y. Kanai, H. Tamura, K. Yamakawa, K. Yoshida, S. J. Greaves, and H. Muraoka
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 50 Pages: 3001404 1-4

    • DOI

      10.1109/TMAG.2014.2325865

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Model analysis of tilted spin-torque oscillator with magnetic write head for shingled microwave-assisted magnetic recording2014

    • Author(s)
      T. Katayama, Y. Kanai, K. Yoshida, S. J. Greaves, and H. Muraoka
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 50 Pages: 3001904 1-4

    • DOI

      10.1109/TMAG.2014.2325609

    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Areal Density prediction for Microwave Assisted Magnetic Recording (MAMR)2015

    • Author(s)
      K. K. Teo, K. Chan, S. Greaves, and Y. Kanai
    • Organizer
      IEEE International Magnetics Conference (INTERMAG 2015)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2015-05-11 – 2015-05-15
  • [Presentation] Microwave-assisted shingled magnetic recording2015

    • Author(s)
      S. Greaves, Y. Kanai, and H. Muraoka
    • Organizer
      IEEE International Magnetics Conference (INTERMAG 2015)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2015-05-11 – 2015-05-15
  • [Presentation] Optimal Write Head Design for Perpendicular Magnetic Recording2015

    • Author(s)
      H. Wang, T. Katayama, K. Chan, Y. Kanai, Z. Yuan, and S. Shafidah
    • Organizer
      IEEE International Magnetics Conference (INTERMAG 2015)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2015-05-11 – 2015-05-15
  • [Presentation] Performance evaluation of LDPC coding and iterative decoding system in TDMR R/W channel with head skew2015

    • Author(s)
      R. Suzutou, Y. Nakamura, H. Osawa, Y. Okamoto, Y. Kanai, and H. Muraoka
    • Organizer
      IEEE International Magnetics Conference (INTERMAG 2015)
    • Place of Presentation
      Beijing, China
    • Year and Date
      2015-05-11 – 2015-05-15
  • [Presentation] 高周波アシスト磁気記録ヘッドのSTO発振解析シミュレーション(2) : STO-ヘッド相互作用と最適な注入電流密度2015

    • Author(s)
      片山拓人, 金井 靖, 吉田和悦, S. Greaves, 村岡裕明
    • 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
      愛知県名古屋市
    • Year and Date
      2015-03-06 – 2015-03-06
  • [Presentation] SMRにおけるアレイヘッド再生のための二次元等化に関する一検討2014

    • Author(s)
      藤本直樹, 仲村泰明, 大沢寿, 岡本好弘, 金井 靖, 村岡裕明
    • 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
      愛媛県松山市
    • Year and Date
      2014-12-11 – 2014-12-12
  • [Presentation] ヘッドスキューのあるSMRにおけるLDPC符号化・繰返し復号化方式の性能評価2014

    • Author(s)
      鈴藤稜太, 仲村泰明, 岡本好弘, 大沢寿, 金井 靖, 村岡裕明
    • 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
      愛媛県松山市
    • Year and Date
      2014-12-11 – 2014-12-12
  • [Presentation] Modelling of thermally assisted magnetic recording with the LLB equation and Brillouin functions2014

    • Author(s)
      S. Greaves, Y. Kanai, and H. Muraoka
    • Organizer
      59th Annual Magnetism and Magnetic Materials Conference (MMM)
    • Place of Presentation
      Honolulu, HI, U.S.A.
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] Micromagnetic model analysis of integrated SPT head with tilted STO for high-frequency microwave-assisted magnetic recording2014

    • Author(s)
      T. Katayama, Y. Kanai, K. Yoshida, S. Greaves, and H. Muraoka
    • Organizer
      59th Annual Magnetism and Magnetic Materials Conference (MMM)
    • Place of Presentation
      Honolulu, HI, U.S.A.
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] High track density recording of shingled magnetic recording combined with microwave-assisted magnetization reversal2014

    • Author(s)
      T. Tanaka, S. Kashiwagi, Y. Kanai, and K. Matsuyama
    • Organizer
      59th Annual Magnetism and Magnetic Materials Conference (MMM)
    • Place of Presentation
      Honolulu, HI, U.S.A.
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] Micromagnetic model analysis of high-frequency thermally-assisted magnetic recording2014

    • Author(s)
      Y. Kanai, S. Greaves, K. Yoshida, and H. Muraoka
    • Organizer
      59th Annual Magnetism and Magnetic Materials Conference (MMM)
    • Place of Presentation
      Honolulu, HI, U.S.A.
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] Bit error rate performance for head skew angle in shingled magnetic recording using dual reader heads.2014

    • Author(s)
      Y. Nakamura, H. Osawa, Y. Okamoto, Y. Kanai, and H. Muraoka
    • Organizer
      59th Annual Magnetism and Magnetic Materials Conference (MMM)
    • Place of Presentation
      Honolulu, HI, U.S.A.
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] Performance evaluation of signal dependent noise predictive ML detector for TDMR R/W channel2014

    • Author(s)
      S. Kawamura, Y. Okamoto, Y. Nakamura, H. Osawa, Y. Kanai, and H. Muraoka
    • Organizer
      59th Annual Magnetism and Magnetic Materials Conference (MMM)
    • Place of Presentation
      Honolulu, HI, U.S.A.
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] 高周波アシスト磁気記録ヘッドのSTO発振解析シミュレーション2014

    • Author(s)
      片山拓人, 金井 靖, 吉田和悦, S. Greaves, 村岡裕明
    • 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
      新潟県柏崎市
    • Year and Date
      2014-10-02 – 2014-10-03
  • [Presentation] SMR-MAMR用ヘッドの高周波記録電流への応答解析2014

    • Author(s)
      片山拓人, 金井 靖, 吉田和悦, S. Greaves, 村岡裕明
    • Organizer
      第38回日本磁気学会学術講演会
    • Place of Presentation
      神奈川県横浜市
    • Year and Date
      2014-09-02 – 2014-09-05
  • [Presentation] SMRにおけるヘッドスキュー角に対するビット誤り率特性2014

    • Author(s)
      仲村泰明, 大沢 寿, 岡本好弘, 金井 靖, 村岡裕明
    • Organizer
      第38回日本磁気学会学術講演会
    • Place of Presentation
      神奈川県横浜市
    • Year and Date
      2014-09-02 – 2014-09-05
  • [Presentation] 4Tbits/inch^2級のマイクロ波アシスト磁気記録シミュレーション2014

    • Author(s)
      柏木翔太, 田中輝光, 金井 靖, 松山公秀
    • Organizer
      第38回日本磁気学会学術講演会
    • Place of Presentation
      神奈川県横浜市
    • Year and Date
      2014-09-02 – 2014-09-05
  • [Presentation] The dynamics of microwave assisted magnetic recording2014

    • Author(s)
      S. Greaves, Y. Kanai, T. Katayama, and H. Muraoka
    • Organizer
      The 25th Magnetic Recording Conference (TMRC 2014)
    • Place of Presentation
      Berkeley, CA, U.S.A.
    • Year and Date
      2014-08-11 – 2014-08-13
    • Invited
  • [Presentation] A study of TDMR singlal-processing opportunities based on quasi-micromagnetic simulations2014

    • Author(s)
      B. Vasic, M. Khatami, Y. Nakamura, Y. Okamoto, Y. Kanai, J. R. Barry, S. W. Mclaughlin, and E. Banan Sadeghian
    • Organizer
      The 25th Magnetic Recording Conference (TMRC 2014)
    • Place of Presentation
      Berkeley, CA, U.S.A.
    • Year and Date
      2014-08-11 – 2014-08-13
    • Invited
  • [Remarks] 金井研究室

    • URL

      http://kanai-lab.iee.niit.ac.jp/~web/

URL: 

Published: 2016-06-03  

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