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Growth of rare-earth doped magnetic semiconductor superlattices and tructural analysis and properties investigation using synchrotron radiation.

Research Project

Project/Area Number 18710088
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Nanostructural science
Research InstitutionKagawa University

Principal Investigator

MIYAGAWA Hayato  Kagawa University, 工学部, 講師 (00380197)

Research Collaborator TAKAHASHI Naoshi  香川大学, 教育学部, 准教授 (80325307)
Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,590,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥90,000)
Fiscal Year 2008: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2007: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2006: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordsナノ構造物性 / 超格子 / 希土類元素 / 磁性半導体 / 磁性多層膜 / スピントロニクス / 交換相互作用 / ヘテロ接合 / 半導体超格子 / 断面TEM観察像
Research Abstract

本研究では、室温で強磁性を示す磁性半導体を用いた超格子構造によって磁気物性や光電子物性等の材料特性を向上させることを目的とし、分子線エピタキシー(MBE)法により、磁性元素である希土類元素を微量に添加した磁性半導体を作製し、更に異なる組成で周期的に繰り返し積層させることで磁性超格子構造の作製を行い、その構造評価を電子顕微鏡法、X線回折法で行うと同時に物性評価を磁化測定に加え放射光実験により行った。本補助金により導入整備した高温蒸発源セルによって、一般に蒸発温度が高くエピタキシャル蒸着の困難な希土類元素の蒸発レイト制御が可能となり、これによりGd(ガドリニウム)を安定供給させることで均一組成を有する磁性半導体GaAsGdの作製に成功した。磁化測定による成長条件と室温強磁性との関係の検討に加え、放射光X線による光電子分光実験を行い、Gd周りの原子間結合(Gd-As結合、Gd-O結合)が磁性に強く影響することを明らかにした。さらに、GaAsとGaAsGdの超格子構造、金属Gdの多層構造の作製を行い、作製条件による結晶安定性と強磁性安定性の変化について検討した。結果を学術会議で発表するとともに論文化を行った。

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (29 results)

All 2009 2008 2007 2006

All Journal Article (12 results) (of which Peer Reviewed: 9 results) Presentation (16 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Structure and magnetic properties of Gd/Fe layers grown by MBE2009

    • Author(s)
      H.Miyagawa, H.Shiraoka, M.Tani, K.Fujii, N.Takahashi, S.Koshiba, Y.Tanaka, N.Tsurumachi, S.Nakanishi, H.Itoh
    • Journal Title

      Journal of Crystal Growth 311

      Pages: 2143-2146

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Structure and magnetic properties of Gd/Fe layers grown by MBE2009

    • Author(s)
      H. Miyagawa, 他
    • Journal Title

      Journal of Crystal Growth 311

      Pages: 2143-2146

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MBE Growth of Diluted Magnetic Semiconductor Gadolinium-doped GaAs2008

    • Author(s)
      H.Shiraoka, H.Miyagawa, S.Higuchi, K.Fujii, N.Takahashi, Y.Watanabe, K.Oda, N.Tsurumachi, S.Nakanishi, H.Itoh, S.Koshiba
    • Journal Title

      Transactions of the Materials Research Society of Japan 33

      Pages: 299-302

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Structure and Magnetic Properties of Gd-doped Gallium Arsenide Grown by MBE2008

    • Author(s)
      H. Miyagawa, H. Shiraoka, S. Higuchi, K. Fujii, N. Takahashi, ほか6名
    • Journal Title

      Ext. Abst. The International Conference on Solid State Device and Materials

      Pages: 68-69

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] MBE Growth of Diluted Magnetic Semiconductor Gadolinium-doped GaAs.2008

    • Author(s)
      H. Miyagawa, 他
    • Journal Title

      Transactions of the-Materials Research Society of Japan 33

      Pages: 299-302

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MBE Growth of Diluted Mangetic Semiconductor Gadolinium-doped GaAs2007

    • Author(s)
      H. Shiraoka, H. Miyagawa, S. Higushi, K. Fujii, N. Takahashi, ほか6名
    • Journal Title

      Abstract of The 17th Iketani Conference : The Doyama Symposium

      Pages: 40-43

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] GaAs(001)基板上へのGd/Fe多層膜のMBE成長2007

    • Author(s)
      白岡裕之,松下幸太郎,宮川勇人,高橋尚志,小柴俊
    • Journal Title

      応用物理学会関係連合講演会講演予稿集第54回 No.1

      Pages: 235-235

    • Related Report
      2008 Final Research Report
  • [Journal Article] Structure and Magnetic Properties of Gd-doped Gallium Arsenide Grown by MBE2007

    • Author(s)
      H. Miyagawa, H. Shiraoka, S. Higuchi, K. Fujii, N. ikahashi, ほか6名
    • Journal Title

      Ext. Abst. the International Conference on Solid state Device and Materials

      Pages: 68-69

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] MBE Growth of Diluted Mangetic Semiconductor Gadolinium-dopdGaAs2007

    • Author(s)
      H. Shiraoka, H. Miyagawa, S. Higushi, K. Fujii, N. Takahashi, ほか6名
    • Journal Title

      Abstract of The 17th Iketani Conference: The Doyama Symposium

      Pages: 40-40

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] GaAs(001)基板上へのGd/Fe多層膜のMBE成長2007

    • Author(s)
      白岡裕之, 松下幸太郎, 宮川勇人, 高橋尚志, 小柴 俊
    • Journal Title

      応用物理学会関係連合講演会講演予稿集 第54回 No.1

      Pages: 235-235

    • Related Report
      2006 Annual Research Report
  • [Journal Article] MBE Growth of Gd/Fe Multilayer on GaAs(001)2006

    • Author(s)
      H.Miyagawa, S.Koshiba, N. Takahashi, N.Tsurumachi
    • Journal Title

      Ext. Abst. The International Conference on Solid State Device and Materials

      Pages: 1084-1085

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] MBE Growth of Gd/Fe Multilayer on GaAs(001)2006

    • Author(s)
      H.Miyagawa, S.Koshiba, N.Takahashi, N.Tsurumachi
    • Journal Title

      Ext. Abst. the International Conference on Solid State Device and Materials

      Pages: 1084-1084

    • Related Report
      2006 Annual Research Report
  • [Presentation] The alignment of magnetic moments in Gd/NiFe sputtered multilayer2008

    • Author(s)
      Hayato Miyagawa ; Fernando J. Castano ; Bryan G. Ng ; Chunghee Nam ; C.A. Ross
    • Organizer
      53rd Annual Conference on Magnetism and Magnetic Materials (MMM2008)
    • Place of Presentation
      Hilton Austin, Texas USA
    • Year and Date
      2008-11-13
    • Related Report
      2008 Final Research Report
  • [Presentation] MBE Growth of Gadolinium-doped GaAs2008

    • Author(s)
      Naoshi Takahashi ; Hayato Miyagawa ; Hiroyuki Shiraoka ; Shuhei Higuchi; Michihiro Tani ; Kensuke Fujii ; Noriaki Tsurumachi ; Shunsuke Nakanishi ; Hiroshi Itoh ; Shyun Koshiba
    • Organizer
      International Conference on Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British Columbia, Vancouver, Canada
    • Year and Date
      2008-08-07
    • Related Report
      2008 Final Research Report
  • [Presentation] Structure and magnetic properties of Gd/Fe layer grown by MBE2008

    • Author(s)
      Hayato Miyagawa ; Hiroyuki Shiraoka ; Michihiro Tani ; Shuhei Higuchi ; Kensuke Fujii ; Naoshi Takahashi ; Shyun Koshiba ; Noriaki Tsurumachi ; Shunsuke Nakanishi ; Hiroshi Itoh
    • Organizer
      International Conference on Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British Columbia, Vancouver, Canada
    • Year and Date
      2008-08-06
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] Optical Property of GaNAs/GaAs Multiple Thin-Quantum-Well Structure Grown by RF-MBE2008

    • Author(s)
      Kensuke Fujii ; Daisuke Nakase ; Yuichi Deguchi ; Yuichi Oda ; Tsuneaki Kumamoto ; Noriaki Tsurumachi ; Yasuhiro Tanaka ; Hayato Miyagawa ; Hiroshi Itoh ; Shunsuke Nakanishi ; Toshio Takahashi ; Hidefumi Akiyama ; Shyun Koshiba
    • Organizer
      International Conference on Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British Columbia, Vancouver, Canada
    • Year and Date
      2008-08-05
    • Related Report
      2008 Final Research Report
  • [Presentation] Cumulative Effects of Strain on GaNAs/GaAs Stacked Quantum Wells2008

    • Author(s)
      Shyun Koshiba ; Kensuke Fujii ; Tomohiko Hirashima ; Yuichi Deguchi ; Tsuneaki Kumamoto ; Yuichi Oda ; Daisuke Nakase ; Yasuhiro Tanaka ; Noriaki Tsurumachi ; Hayato Miyagawa ; Hiroshi Itoh ; Shunsuke Nakanishi ; Hidefumi Akiyama ; Toshio Takahashi
    • Organizer
      International Conference on Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British Columbia, Vancouver, Canada
    • Year and Date
      2008-08-05
    • Related Report
      2008 Final Research Report
  • [Presentation] MBE Growth of Gadolinium-doped GaAs2008

    • Author(s)
      Hayato Miyagawa, 他
    • Organizer
      International Conference on Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British Columbia, VancouVer, Canada
    • Related Report
      2008 Annual Research Report
  • [Presentation] Optieal Property of GaNAs/GaAs Multiple Thin-Quan tum-Well Structure Grown, by RF-MBE2008

    • Author(s)
      Hayato Miyagawa, 他
    • Organizer
      International Conference on Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British ColuMbia, Vancouver, Canada
    • Related Report
      2008 Annual Research Report
  • [Presentation] Cumulative Effects of Strain on GaNAs/GaAs Stacked Quantum Wells2008

    • Author(s)
      Hayato Miyagawa, 他
    • Organizer
      International Conference on, Molecular Beam Epitaxy 2008 (MBE2008)
    • Place of Presentation
      University of British Columbia, Vancouver, Canada
    • Related Report
      2008 Annual Research Report
  • [Presentation] The alignment of magnetic moments in Gd/NiFe sputtered multilayer.2008

    • Author(s)
      Hayato Miyagawa, 他
    • Organizer
      53rd Annual Conference on Magnetism and Magnetic Materials (MMM2008)
    • Place of Presentation
      Hilton Austin, Texas USA
    • Related Report
      2008 Annual Research Report
  • [Presentation] Structure and Magnetic Properties of Gd-doped Gallium Arsenide Grown by MBE2007

    • Author(s)
      H. Shiraoka, H. Miyagawa, S. Higuchi, K. Fujii, N.Takahashi, S.Koshiba
    • Organizer
      固体素子材料カンファエレンス
    • Place of Presentation
      つくば国際会議場(エポカルつくば)
    • Year and Date
      2007-09-19
    • Related Report
      2008 Final Research Report
  • [Presentation] Structure and Magnetic Properties of Gd-doped Gallium Arsenide Grown by MBE2007

    • Author(s)
      H. Shiraoka, H. Miyagawa, S. Higushi, K. Fujii, N.Takahashi, S.Koshiba
    • Organizer
      固体素子材料カンファレンス
    • Place of Presentation
      つくば国際会議場(エポカルつくば)
    • Year and Date
      2007-09-19
    • Related Report
      2007 Annual Research Report
  • [Presentation] MBE Growth of Diluted Mangetic Semiconductor Gadolinium-doped GaAs2007

    • Author(s)
      H. Shiraoka, H. Miyagawa, S. Higuchi, K. Fujii, N. Takahashi
    • Organizer
      第17回池谷カンファレンス、堂山シンポジウム
    • Place of Presentation
      東京大学本郷キャンパス
    • Year and Date
      2007-09-05
    • Related Report
      2008 Final Research Report
  • [Presentation] MBE Growth of Diluted Mangetic Semiconductor Gadolinium-dopdGaAs2007

    • Author(s)
      H. Shiraoka, H. Miyagawa, S. Higushi, K. Fujii, N. Takahashi
    • Organizer
      第17回池谷カンファレンス、堂山シンポジウム
    • Place of Presentation
      東京大学本郷キャンパス
    • Year and Date
      2007-09-05
    • Related Report
      2007 Annual Research Report
  • [Presentation] GaAs(001)基板上へのGd/Fe多層膜のMBE成長2007

    • Author(s)
      白岡裕之、金堂元紀、宮川勇人、藤井健輔、高橋尚志、小柴俊
    • Organizer
      物理・応用物理学会中国四国支部講演会
    • Place of Presentation
      岡山大学津島キャンパス
    • Year and Date
      2007-08-04
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] MBE法による希薄磁性半導体GaAs:Gdの作製2007

    • Author(s)
      樋口修平、白岡裕之、谷理博、宮川勇人、小柴俊、高橋尚志、鶴町徳昭
    • Organizer
      物理・応用物理学会中国四国支部講演会
    • Place of Presentation
      岡山大学津島キャンパス
    • Year and Date
      2007-08-04
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] MBE Growth of Gd/Fe Multilayer on GaAs(001)2006

    • Author(s)
      H. Miyagawa, S. Koshiba, N. Takahashi, N. Tsurumachi, H. Shiraoka, K. Matsushita, S. Nakanishi and H. Itoh
    • Organizer
      固体素子材料カンファエレンス
    • Place of Presentation
      パシフィコ横浜
    • Related Report
      2008 Final Research Report
  • [Patent(Industrial Property Rights)] 窒素ラジカル変調制御法による窒素含有化合物半導体多層積層体の製造方法2006

    • Inventor(s)
      小柴俊、宮川勇人、鶴町徳昭、中西俊介、伊藤寛
    • Industrial Property Rights Holder
      香川大学
    • Patent Publication Number
      2007-201345
    • Filing Date
      2006-01-30
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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