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Study of spin-transfer torque MRAM using thermal assistnce

Research Project

Project/Area Number 22560315
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research Institution公益財団法人名古屋産業科学研究所 (2012)
Nagoya Industrial Science Research Institute (2010-2011)

Principal Investigator

TSUNASHIMA Shigeru  公益財団法人名古屋産業科学研究所, その他部局等, 研究員 (80023323)

Co-Investigator(Renkei-kenkyūsha) IWATA Satoshi  名古屋大学, 大学院工学研究科, 教授 (60151742)
KATO Takeshi  名古屋大学, 大学院工学研究科, 准教授 (50303665)
Project Period (FY) 2010 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords電気 / 電子材料 / メモリ / 磁性薄膜 / 磁気トンネル効果 / 磁気メモリ / 磁気ランダムアクセスメモリ / 磁気トンネル接合 / 熱アシスト磁化反転 / 希土類-遷移金属 / GdFeCo / TbFe
Research Abstract

Heat-assistance of the MRAM cell during the writing is considered to be effective to reduce the critical current density for the spin transfer torque (STT) switching. We fabricated giant magneto-resistance films with GdFeCo memory layers and investigated their STT switching aiming for the application to the thermally assisted MRAM. We also fabricated perpendicularly magnetized tunnel junctions with TbFe layer which has a large perpendicular anisotropy and low curie temperature. In both experiments we found that heat assistance is effective to reduce the current density for the STT switching.

Report

(4 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • Research Products

    (39 results)

All 2013 2012 2011 2010 Other

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (29 results)

  • [Journal Article] Control of Magnetic Properties of MnBiCu Thin Films by Kr+ Ion Irradiation2012

    • Author(s)
      Q. Xu, R. Kanbara, T. Kato, S. Iwata, and S. Tsunashima
    • Journal Title

      J.Appl. Phys.

      Volume: vol. 111

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Perpendicular anisotropy and Gilbert damping in sputtered Co/Pd multilayers2012

    • Author(s)
      T. Kato, Y. Matsumoto, S. Okamoto, N. Kikuchi, S. Iwata, O. Kitakami, S. Tsunashima
    • Journal Title

      IEEE Trans. Magn

      Volume: vol. 48, no. 11 Pages: 3288-3291

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Spin transfer torque switching of amorphous GdFeCo with perpendicular magnetic anisotropy for thermally assisted magnetic memories2012

    • Author(s)
      Dai, T.Kato, S.Iwata and S.Tsunashima
    • Journal Title

      IEEE Trans. Magn

      Volume: vol. 48, no. 11 Pages: 3223-3226

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Bit patterned structure fabricated by Kr+ ion irradiation onto MnBiCu films2012

    • Author(s)
      Q. Xu, R. Kanbara, T. Kato, S. Iwata, and S. Tsunashima
    • Journal Title

      IEEE Trans. M

      Volume: vol. 48, no. 11, Pages: 3406-3409

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Spin transfer torque switching of amorphous GdFeCo with perpendicular magnetic anisotropy for thermally assisted magnetic memories2012

    • Author(s)
      B.Dai
    • Journal Title

      IEEE Trans. Magn.

      Volume: 48 Pages: 3223-3226

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Perpendicular anisotropy and Gilbert damping in sputtered Co/Pd multilayers2012

    • Author(s)
      T. Kato
    • Journal Title

      IEEE Trans. Magn.

      Volume: 48 Pages: 3288-3291

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Control of Magnetic Properties of MnBiCu Thin Films by Kr+ Ion Irradiation2012

    • Author(s)
      Q. Xu
    • Journal Title

      J. Appl. Phys.

      Volume: 111 Issue: 7

    • DOI

      10.1063/1.3675981

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bit patterned structure fabricated by Kr+ ion irradiation onto MnBiCu films2012

    • Author(s)
      Q. Xu
    • Journal Title

      IEEE Trans. Magn.

      Volume: 48 Pages: 3406-3409

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication of L12-CrPt3 alloy films using rapid thermal annealing for planar bit patterned media2010

    • Author(s)
      T.Kato
    • Journal Title

      IEEE Trans.Magn.

      Volume: 46 Pages: 1671-1674

    • NAID

      120004384215

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] GdFeCoフリー層を用いたCPP-GMR素子におけるスピン注入磁化反転と層間結合2010

    • Author(s)
      小澤智裕
    • Journal Title

      電気学会論文誌A

      Volume: 130 Pages: 631-635

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Presentation] Switching field distribution measurement of ion beam patterned MnGa film2013

    • Author(s)
      D. Oshima, T. Kato, S. Iwata, S. Tsunashima
    • Organizer
      International Symposium on Advanced Magnetic Materials and Applications 2013
    • Place of Presentation
      Taichung, Taiwan
    • Related Report
      2012 Final Research Report
  • [Presentation] Patterning of magnetic films by ion irradiation for ultra high density data storage (Invited)2013

    • Author(s)
      T. Kato, D. Oshima, M. Tanimoto, S. Iwata, S. Tsunashima
    • Organizer
      2nd International Congress on Advanced Materials
    • Place of Presentation
      Zhenjiang, China
    • Related Report
      2012 Final Research Report
  • [Presentation] Ion beam irradiation for the fabrication of planer bit patterned media (Invited)2013

    • Author(s)
      T. Kato, D. Oshima, M. Tanimoto, S. Iwata, S. Tsunashima
    • Organizer
      Collaborative Conference on Materials Research
    • Place of Presentation
      Jeju island, South Korea
    • Related Report
      2012 Final Research Report
  • [Presentation] Pulse width and temperature dependences of critical current density of spin transfer torque switching amorphous GdFeCo for thermally assisted MRAM,2013

    • Author(s)
      Dai, T. Kato, S. Iwata, S. Tsunashima
    • Organizer
      12th Joint MMM/Intermag Conference
    • Place of Presentation
      Chicago, USA
    • Related Report
      2012 Final Research Report
  • [Presentation] Control of magnetic properties of MnGa films by Kr+ ion irradiation for application to bit patterned media2013

    • Author(s)
      D. Oshima, T. Kato, S. Iwata, S. Tsunashima
    • Organizer
      12th Joint MMM/Intermag Conference
    • Place of Presentation
      Chicago, USA
    • Related Report
      2012 Final Research Report
  • [Presentation] TbFe垂直磁化膜をメモリー層とした磁気トンネル接合の熱アシスト磁化反転2013

    • Author(s)
      藤澤佑樹,吉川大貴,加藤剛志,岩田聡,綱島滋
    • 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
      名古屋大
    • Related Report
      2012 Final Research Report
  • [Presentation] Thermally Assisted Magnetic Switching on Magnetic Tunnel Junctions2013

    • Author(s)
      Y. Fujisawa
    • Organizer
      The 2nd International Conference of AUMU
    • Place of Presentation
      Nara, Japan
    • Related Report
      2012 Annual Research Report
  • [Presentation] Bit patterned structure fabricated by Kr+ ion irradiation onto MnBiCu films2012

    • Author(s)
      Q. Xu, R. Kanbara, T. Kato, S. Iwata, and S. Tsunashima
    • Organizer
      IEEE International Magnetics Conference 2012
    • Place of Presentation
      Vancouver, Canada
    • Related Report
      2012 Final Research Report
  • [Presentation] Compositional dependence of critical current density for spin transfer torque switching of amorphous GdFeCo for thermally assisted MRAM2012

    • Author(s)
      Dai, T.Kato, S.Iwata and S.Tsunashima
    • Organizer
      The 19th International Conference on Magnetism
    • Place of Presentation
      Busan, Korea
    • Related Report
      2012 Final Research Report
  • [Presentation] Co/Pd多層膜の垂直磁気異方性とGilbertダンピング定数2012

    • Author(s)
      加島新之助,加藤剛志,松本宣大,岡本聡,菊池伸明,北上修,岩田聡,綱島滋
    • Organizer
      平成24年電気学会基礎・材料・共通部門大会
    • Place of Presentation
      秋田大,秋田
    • Related Report
      2012 Final Research Report
  • [Presentation] Gilbert damping of Co/Pd multilayers with perpendicular anisotropy2012

    • Author(s)
      S. Kashima, T. Kato, Y. Matsumoto, S. Okamoto, N. Kikuchi, O. Kitakami, S. Iwata, S. Tsunashima
    • Organizer
      International Conference of the Asian Union of Magnetics Societies 2012
    • Place of Presentation
      Nara, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] Current induced magnetization switching of amorphous GdFeCo with perpendicular magnetic anisotropy2012

    • Author(s)
      Dai, T. Kato, S. Iwata, S.Tsunashima
    • Organizer
      International Conference of the Asian Union of Magnetics Societies 2012
    • Place of Presentation
      Nara, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] Thermally Assisted Magnetic Switching on Magnetic Tunnel Junctions with TbFe alloy memory layer2012

    • Author(s)
      Y. Fujisawa, T. Kato, S. Iwata, S. Tsunashima
    • Organizer
      International Conference of the Asian Union of Magnetics Societies 2012
    • Place of Presentation
      Nara, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] Control of magnetic properties of MnGa films by Kr+ ion irradiation2012

    • Author(s)
      D. Oshima, T. Kato, S. Iwata, S. Tsunashima
    • Organizer
      International Conference of the Asian Union of Magnetics Societies 2012
    • Place of Presentation
      Nara, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] 規則合金膜へのイオン照射による磁気特性制御とビットパターン構造の作製2012

    • Author(s)
      大島大輝,谷本昌大,加藤剛志,岩田聡,綱島滋
    • Organizer
      電子情報通信学会電子部品・材料研究会
    • Place of Presentation
      機会振興会館,東京
    • Related Report
      2012 Final Research Report
  • [Presentation] Structural dependent Gilbert damping in sputtered Co/Pd multilayers2012

    • Author(s)
      T. Kato, Y. Matsumoto, S. Okamoto, N. Kikuchi, S. Iwata, O. Kitakami, S. Tsunashima
    • Organizer
      IEEE International Magnetics Conference 2012
    • Place of Presentation
      Vancouver, Canada
    • Related Report
      2012 Final Research Report
  • [Presentation] Control of magnetic properties of MnAI films by Kr+ ion irradiation for planar bit patterned media2012

    • Author(s)
      D. Oshima, T. Kato, S. Iwata, and S. Tsunashima
    • Organizer
      IEEE International Magnetics Conference 2012
    • Place of Presentation
      Vancouver, Canada
    • Related Report
      2012 Final Research Report
  • [Presentation] Spin transfer torque switching of amorphous GdFeCo with perpendicular magnetic anisotropy for thermally assisted magnetic memories2012

    • Author(s)
      B.Dai, T.Kato, S.Iwata and S.Tsunashima
    • Organizer
      IEEE International Magnetics Conference 2012
    • Place of Presentation
      Vancouver, Canada
    • Related Report
      2012 Final Research Report
  • [Presentation] Planar bit patterned media fabricated by ion beam irradiation (Invited)2012

    • Author(s)
      T. Kato, D. Oshima, M. Tanimoto, Q. Xu, S. Iwata, S. Tsunashima
    • Organizer
      2012 Energy Materials Nanotechnology Fall Meeting
    • Place of Presentation
      Las Vegas, USA
    • Related Report
      2012 Final Research Report
  • [Presentation] Co/Ni多層膜の垂直磁気異方性と時間分解磁化ダイナミクス2011

    • Author(s)
      加藤剛志
    • Organizer
      電気学会・マグネティックス研究会
    • Place of Presentation
      東北大学(仙台)
    • Year and Date
      2011-11-25
    • Related Report
      2011 Annual Research Report
  • [Presentation] Kr^+イオン照射によるMnBiCu膜へのビットパターン構造の作製2011

    • Author(s)
      神原龍太郎
    • Organizer
      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
      2011-09-30
    • Related Report
      2011 Annual Research Report
  • [Presentation] Kr+イオン照射によるMnAl膜の磁気特性制御2011

    • Author(s)
      大鳥大輝
    • Organizer
      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
      2011-09-30
    • Related Report
      2011 Annual Research Report
  • [Presentation] Co/Ni多層膜の垂直磁気異方性とダンピング定数2011

    • Author(s)
      加藤剛志
    • Organizer
      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
      2011-09-30
    • Related Report
      2011 Annual Research Report
  • [Presentation] Ultrafast decoupling of GdFeCo/TbFe/TbFeCo exchange coupled trilayer triggered by ultra-short pulse laser2011

    • Author(s)
      Y.Matsumoto
    • Organizer
      Magnetics and Optics Research International Symposium 2011
    • Place of Presentation
      Nijmegen, The Netherlands
    • Year and Date
      2011-06-22
    • Related Report
      2011 Annual Research Report
  • [Presentation] Control of Magnetic Properties of MnBiCu Thin Films by Kr^+ Ion Irradiation□2011

    • Author(s)
      Q.Xu
    • Organizer
      Magnetics and Optics Research International Symposium 2011
    • Place of Presentation
      Nijmegen, The Netherlands
    • Year and Date
      2011-06-22
    • Related Report
      2011 Annual Research Report
  • [Presentation] TbFe層を用いた垂直磁化MTJの熱アシスト磁化反転2011

    • Author(s)
      野田晃司
    • Organizer
      電子情報通信学会・磁気記録研究会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2011-03-11
    • Related Report
      2010 Annual Research Report
  • [Presentation] Co/Pt多層膜の磁区構造を利用した常磁性微粒子の捕捉2010

    • Author(s)
      中野翔
    • Organizer
      第34回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
      2010-09-04
    • Related Report
      2010 Annual Research Report
  • [Presentation] Modification of Magnetic Properties of MnBi Films by Kr+Ion Irradiation2010

    • Author(s)
      S.Jyo
    • Organizer
      ISAMMA 2010
    • Place of Presentation
      仙台国際センター
    • Year and Date
      2010-07-16
    • Related Report
      2010 Annual Research Report
  • [Presentation] TbFe垂直磁化膜をメモリー層とした磁気トンネル接合の熱アシスト磁化反転

    • Author(s)
      藤澤佑樹
    • Organizer
      電子情報通信学会
    • Place of Presentation
      名古屋大学
    • Related Report
      2012 Annual Research Report

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Published: 2010-11-30   Modified: 2023-01-13  

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