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2012 Fiscal Year Final Research Report

Basic study of high-density nanowire memories by using ferrimagnetic multilayers

Research Project

  • PDF
Project/Area Number 22560318
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Electron device/Electronic equipment
Research InstitutionIbaraki University

Principal Investigator

KOMINE Takashi  茨城大学, 工学部, 准教授 (90361287)

Co-Investigator(Kenkyū-buntansha) SUGITA Ryuji  茨城大学, 工学部, 教授 (20292477)
HASEGAWA Yasuhiro  埼玉大学, 工学部, 准教授 (60334158)
Project Period (FY) 2010 – 2012
Keywords磁気メモリ / ナノワイヤ / スピントランスファートルク / 磁壁移動
Research Abstract

In order to reduce a critical current density in nanowire memories based on spin-transfer torque effect, the effect of material parameters on the critical current density has been investigate. In order to realize high-density bit, the effect of nanowire structure on recording density has also been studied. As a result, the redction of the saturation magnetization is an effective way to reduce the critical current density, and we have proposed that a ferrimagnetic material near the compensation composition is a strong candidate for the low current operation. Moreover, we have proposed the bilayer nanowire consisting of a granular layer and a continuous layer to achieve high-density bit further than that of single-layered nanowires.

  • Research Products

    (24 results)

All 2012 2011 2010 Other

All Journal Article (12 results) (of which Peer Reviewed: 12 results) Presentation (11 results) Remarks (1 results)

  • [Journal Article] ピン止めを有するナノワイヤにおける電流誘起磁壁移動のシミュレーション2012

    • Author(s)
      大庭綾香,藤村勇馬,小峰啓史,杉田龍二
    • Journal Title

      J. Magn. Soc. Jpn

      Volume: Vol. 36, No. 3 Pages: 223-228

    • DOI

      DOI:10.3379/msjmag.1204R007

    • Peer Reviewed
  • [Journal Article] Influence of interlayer coupling on domain wall motion in multilayered nanowires for achieving high density bit2012

    • Author(s)
      A. Ooba, T. Komine, and R. Sugita
    • Journal Title

      IEEE Trans. Magn

      Volume: Vol. 48(11) Pages: 3947-3950

    • DOI

      DOI:10.1109/TMAG.2012.2201451

    • Peer Reviewed
  • [Journal Article] Effect of the pinning field on critical current density for current-induced domain wall motion in perpendicular magnetic anisotropy nanowires2012

    • Author(s)
      A. Ooba, Y. Fujimura, K. Takahashi, T. Komine, and R. Sugita
    • Journal Title

      J. Nanosci. Nanotech.

      Volume: Vol.12 Pages: 7411-7415

    • DOI

      DOI:10.1166/jnn.2012.6544

    • Peer Reviewed
  • [Journal Article] Current-induced domain wall motion in a multilayered nanowire for achieving high density bit2012

    • Author(s)
      T. Komine, A. Ooba, and R. Sugita
    • Journal Title

      J. Appl. Phys

      Volume: Vol. 111, 07D314 Pages: 1-3

    • DOI

      DOI:10.1063/1.3679760

    • Peer Reviewed
  • [Journal Article] 低飽和磁化垂直磁気異方性細線における電流誘起磁壁移動の マイクロマグネティックシミュレーション2011

    • Author(s)
      高橋光太,大庭綾香,小峰啓史,杉田龍二
    • Journal Title

      J. Magn. Soc. Jpn

      Volume: Vol. 35, No. 4 Pages: 366-369

    • DOI

      DOI:10.3379/msjmag.1106R007

    • Peer Reviewed
  • [Journal Article] Numerical study of effect of surface potential on transport properties in Bi nanowires2011

    • Author(s)
      T. Matsumoto, Y. Ichige, T. Komine, R. Sugita, T. Aono Y. Hasegawa, M. Murata, and D. Nakamura
    • Journal Title

      J. Elec. Mater

      Volume: Vol. 40(5) Pages: 1260-1265

    • DOI

      DOI:10.1007/s11664-010-1406-y

    • Peer Reviewed
  • [Journal Article] Numerical Analysis of Effect of Scattering Process on Transport Properties in Bi Nanowires2011

    • Author(s)
      Y. Ichige, T. Matsumoto, T. Komine, R. Sugita, T. Aono Y. Hasegawa, M. Murata, and D. Nakamura
    • Journal Title

      J. Elec. Mater

      Volume: Vol. 40(5) Pages: 523-528

    • DOI

      DOI:10.1007/s11664-010-1426-7

    • Peer Reviewed
  • [Journal Article] Reduction of intrinsic critical current density for current-induced domain wall motion by using a ferrimagnetic nanowire with perpendicular magnetic anisotropy2011

    • Author(s)
      T. Komine, K. Takahashi, A. Ooba and R. Sugita
    • Journal Title

      J. Appl. Phys

      Volume: Vol. 109, 07D503 Pages: 1-3

    • DOI

      DOI:10.1063/1.3545797

    • Peer Reviewed
  • [Journal Article] 磁性細線における電流誘起磁壁移動の交換スティフネス定数依存性2010

    • Author(s)
      高橋光太,村上宏,小峰啓史,杉田龍二
    • Journal Title

      J. Magn. Soc. Jpn

      Volume: Vol. 34, No. 3 Pages: 259-262

    • DOI

      DOI:10.3379/msjmag.1003R022

    • Peer Reviewed
  • [Journal Article] 垂直磁気異方性ナノワイヤにおけるmulti-wall の磁壁移動2010

    • Author(s)
      村上宏,高橋光太,小峰啓史,杉田龍二
    • Journal Title

      J. Magn. Soc. Jpn

      Volume: Vol. 34, No. 3 Pages: 254-258

    • DOI

      DOI:10.3379/msjmag.1003R022

    • Peer Reviewed
  • [Journal Article] Numerical analysis of effective thermal conductivity in microwire array element2010

    • Author(s)
      T. Komine, M. Kuraishi, T. Teramoto, R. Sugita, Y. Hasegawa, M. Murata, and D. Nakamura
    • Journal Title

      J. Elec. Mater

      Volume: Vol. 39(9) Pages: 1606-1610

    • DOI

      DOI:10.1007/s11664-010-1266-5

    • Peer Reviewed
  • [Journal Article] Influence of exchange coupling on current-driven domain wall motion in a nanowire2010

    • Author(s)
      T. Komine, K. Takahashi, H. Murakami and R. Sugita
    • Journal Title

      J. Magn. Magn. Mater

      Volume: Vol. 322 Pages: 2969-2972

    • DOI

      DOI:10.1016/j.jmmm.2010.05.015

    • Peer Reviewed
  • [Presentation] Dependence of hard-axis anisotropy field on domain wall width for current-induced domain wall motion in nanowires2012

    • Author(s)
      M. Itoh, A. Ooba, T. Komine, and R. Sugita
    • Organizer
      4pPS-48, The 2nd International Conference of the Asia Union of Magnetics Societies (ICAUMS2012)
    • Place of Presentation
      Nara, Japan
    • Year and Date
      20121002-05
  • [Presentation] Magnetostatic interaction between continuous and granular layers in multilayered nanowires for current-induced domain wall motion2012

    • Author(s)
      A. Ooba, T. Komine, and R. Sugita
    • Organizer
      4pPS-47, ICAUMS2012
    • Place of Presentation
      Nara, Japan
    • Year and Date
      20121002-05
  • [Presentation] Magnetostatic interaction between tinuous and granular layers in tilayered nanowires for rent-induced domain wall motion2012

    • Author(s)
      A. Ooba, T. Komine, and R. Sugita
    • Organizer
      Joint European Magnetic Symposia (JEMS)
    • Place of Presentation
      Parma, Italy
    • Year and Date
      20120909-14
  • [Presentation] Influence of interlayer coupling on domain wall motion in multilayered nanowires for achieving high density bit2012

    • Author(s)
      A. Ooba, T. Komine, and R. Sugita
    • Organizer
      FR-01, International Magnetics Conference INTERMAG 2012, (Vancouver, B.C.)
    • Place of Presentation
      Canada
    • Year and Date
      20120507-11
  • [Presentation] Current-induced domain wall motion in a multilayered nanowire for achieving high density bit2011

    • Author(s)
      T. Komine, A. Ooba, and R. Sugita
    • Organizer
      FW-07, 56th Conference on Magnetism and Magnetic Materials(MMM)
    • Place of Presentation
      Scottsdale, Arizona
    • Year and Date
      20111030-1103
  • [Presentation] 磁壁ピン止めを有するナノワイヤにおける電流誘起磁壁移動の シミュレーション2011

    • Author(s)
      大庭,藤村,小峰,杉田
    • Organizer
      28pE-1, 第35回日本磁気学会学術講演会
    • Place of Presentation
      朱鷺メッセ,新潟
    • Year and Date
      20110927-30
  • [Presentation] Effect of the pinning field on critical current density for current-induced domain wall motion in perpendicular magnetic anisotropy nanowires2011

    • Author(s)
      A. Ooba, Y. Fujimura, K. Takahashi, T. Komine, and R. Sugita
    • Organizer
      Recent Trends in Nanomagnetism, Spintronics and their Applications
    • Place of Presentation
      Ordizia Spain
    • Year and Date
      20110601-04
  • [Presentation] Reduction of intrinsic critical current density on current-induced domain wall motion by using a ferrimagnetic nanowire2010

    • Author(s)
      T. Komine, K. Takahashi, A. Ooba, and R. Sugita
    • Organizer
      GP-08, 55th Conference on Magnetism and Magnetic Materials(MMM)
    • Place of Presentation
      Atlanta, Georgia
    • Year and Date
      20101114-18
  • [Presentation] 低飽和磁化垂直磁気異方性細線における電流誘起磁壁移動の マイクロマグネティックシミュレーション2010

    • Author(s)
      高橋,大庭,村上,小峰,杉田
    • Organizer
      6aE-6, 日本磁気学会学術講演会
    • Place of Presentation
      つくば国際会議場
    • Year and Date
      20100904-07
  • [Presentation] Numerical Study of Effect of Surface Potential on Transport Properties in Bi Nanowires2010

    • Author(s)
      T. Matsumoto, Y. Ichige, T. Komine, R. Sugita, T. Aono Y. Hasegawa, M. Murata, and D. Nakamura
    • Organizer
      The 29th International Conference on Thermoelectrics (ICT)
    • Place of Presentation
      Shanghei, China
    • Year and Date
      20100530-0603
  • [Presentation] Numerical Analysis of Effect of Scattering Process on Transport Properties in Bi Nanowires2010

    • Author(s)
      Y. Ichige, T. Matsumoto, T. Komine, R. Sugita, T. Aono Y. Hasegawa, M. Murata, and D. Nakamura
    • Organizer
      The 29th ICT
    • Place of Presentation
      Shanghei, China
    • Year and Date
      20100530-0603
  • [Remarks]

    • URL

      http://storagelab.dmt.ibaraki.ac.jp/

URL: 

Published: 2014-08-29  

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