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2008 Fiscal Year Annual Research Report

有機金属気相選択成長を用いた1次元ナノスピンフォトディテクタの研究

Research Project

Project/Area Number 18686026
Research InstitutionHokkaido University

Principal Investigator

原 真二郎  Hokkaido University, 量子集積エレクトロニクス研究センター, 准教授 (50374616)

Keywords有機金属気相成長 / 強磁性体 / III-V族化合物半導体 / ナノクラスタ / スピントロニクス / ヘテロ接合 / 選択形成 / ナノワイヤ
Research Abstract

ナノ領域に電子を閉じ込める半導体ナノワイヤ(NWs)に、電子のスピン制御を可能とする強磁性体を融合した、これまでに無い1次元強磁性体/半導体複合NWsを提案し、そのビルドアップ型結晶成長手法の確立を目的とする。本年度は、キーとなる縦型強磁性体/半導体ヘテロ接合ナノ構造として、GaAs(111)B半導体基板上へのMnAs/Al(Ga)Asヘテロ接合の選択形成技術の確立、結晶構造分析、物性評価等に関する研究を実施した。(1)AlGaAsナノクラスタ(NCs)をバッファ層として利用することにより、意図しないGaAs層の堆積により生じた均一性低下を抑制できる。AlGaAs NCsの形成条件を最適化することにより、高均一なMnAs/AlGaAs NCs(直径〜140mm)の形成が可能となった。(2)結晶磁気異方性と共に形状磁気異方性を有する異方性MnAs NCsを作製し、磁気力顕微鏡による磁区構造評価を行った。これにより、等方性NCsと比べて、単磁区化するNCsの磁化方向の制御性向上を可能にした。(3)MnAs/AlAs/MnAsヘテロ接合構造の作製条件の最適化を行った。原子レベルで平坦なMnAsのc面上では、半導体薄膜の成長自体が困難であったが、表面拡散長が比較的短いAlAs薄膜を非磁性中間層として用い、その成長条件を最適化することにより縦型ヘテロ接合NCsを作製した。(4)量子井戸(ドット)層材料であるGahAs NWsの固相組成を顕微発光測定により評価し、量子構造を内包するNWs形成の指針を得た。マスク開口部のピッチ(周期)が狭い程、NWs中のIn原子の取り込み量が増加する依存性を明らかにし、マスク設計による量子構造設計・制御が可能となった。(5)海外研究協力者と磁気物性評価の面で連携し、強磁性共鳴測定等によってMmAs NCsの明瞭な磁気異方性を確認した。

  • Research Products

    (18 results)

All 2009 2008

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (10 results)

  • [Journal Article] Growth Direction Control of Ferromagnetic MnAs Grown by Selective-Area Metal-Organic Vapor Phase Epitaxy2009

    • Author(s)
      Toshitomo Wakatsuki
    • Journal Title

      Japanese Journal of Applied Physics Vol.48, No.4(掲載決定)

      Pages: 5

    • Peer Reviewed
  • [Journal Article] Selective-Area Growth of Vertically Aligned GaAs and GaAs/AlGaAs Core-Shell Nanowires on Si(111)Substrate2009

    • Author(s)
      Katsuhiro Tomioka
    • Journal Title

      Nanotechnology Vol.20, No.14

      Pages: 145302-1145302-8

    • Peer Reviewed
  • [Journal Article] Single GaAs/GaAsP Coaxial Core-Shell Nanowire Lasers2008

    • Author(s)
      Bin Hua
    • Journal Title

      Nano Letters Vol.9, No.1

      Pages: 112-116

    • Peer Reviewed
  • [Journal Article] SA-MOVPE of InGaAs Nanowires and Their Compositions Studied by Micro-PL Measurement2008

    • Author(s)
      Takuya Sato
    • Journal Title

      Journal of Crystal Growth Vol.310, No.23

      Pages: 5111-5113

    • Peer Reviewed
  • [Journal Article] Control of InAs Nanowire Growth Directions on Si2008

    • Author(s)
      Katsuhiro Tomioka
    • Journal Title

      Nano Letters Vol.8, No.10

      Pages: 3475-3480

    • Peer Reviewed
  • [Journal Article] Microcavity Structures in Single GaAs Nanowires2008

    • Author(s)
      Bin Hua
    • Journal Title

      Physica Status Solidi (c) Vol.5, No.9

      Pages: 2722-2725

    • Peer Reviewed
  • [Journal Article] Growth Characteristics of GaAs Nanowires Obtained by Selective-Area Metal-Organic Vapour-Phase Epitaxy2008

    • Author(s)
      Keitaro Ikejiri
    • Journal Title

      Nanotechnology Vol.19, No.26

      Pages: 265604-1-265604-8

    • Peer Reviewed
  • [Journal Article] Metal-Organic Vapor Phase Epitaxial Growth Condition Dependences of MnAs Nanocluster Formation on GalnAs (111)A Surfaces2008

    • Author(s)
      Hiroko Iguchi
    • Journal Title

      Japanese Journal of Applied Physics Vol.47, No.4

      Pages: 3253-3256

    • Peer Reviewed
  • [Presentation] Near-Infrared Lasers in GaAs/GaAsP Coaxial Core-Shell Nanowires2008

    • Author(s)
      Bin Hua
    • Organizer
      2008 MRS Fall Meeting
    • Place of Presentation
      Hynes Convention Center, Boston, Massachusetts, USA
    • Year and Date
      2008-12-04
  • [Presentation] Vertical III-V Nanowire Growth on Si Substrate by Selective-Area MOVPE2008

    • Author(s)
      Katsuhiro Tomioka
    • Organizer
      2008 MRS Fall Meeting
    • Place of Presentation
      Hynes Convention Center, Boston, Massachusetts, USA
    • Year and Date
      2008-12-03
  • [Presentation] Growth Mechanism of GaAs Nanowires using Catalyst-Free Selective-Area Metal-Organic Vapor Phase Epitaxy2008

    • Author(s)
      Kenji Hiruma
    • Organizer
      2008 MRS Fall Meeting
    • Place of Presentation
      Hynes Convention Center, Boston. Massachusetts. USA
    • Year and Date
      2008-12-01
  • [Presentation] Analysis of the Twin Defects Occurring in GaAs Nanowires Grown by Selective-Area Metal-Organic Vapor Phase Epitaxv2008

    • Author(s)
      Hiroatsu Yoshida
    • Organizer
      5th International Symposium on Surface Science and Nanotechnology (ISSS-5)
    • Place of Presentation
      Waseda University, Tokyo, Japan
    • Year and Date
      2008-11-11
  • [Presentation] Magnetic Domain Characterization of MnAs Nanoclusters Formed on GaAs (111)B Surfaces by Selective-Area MOVPE2008

    • Author(s)
      Shingo Ito
    • Organizer
      21st International Microprocesses and Nanotechnology Conference (MNC 2008)
    • Place of Presentation
      JAL Resort Sea Hawk Hotel, Fukuoka, Japan
    • Year and Date
      2008-10-30
  • [Presentation] Growth Direction Control and Magnetic Characterizations of MnAs Grown by Selective-Area Metal-Organic Vapor Phase Epitaxy2008

    • Author(s)
      Toshitomo Wakatsuki
    • Organizer
      2008 International Conference on Solid State Devices and Materials (SSDM 2008)
    • Place of Presentation
      Tsukuba International Congress Center, Tsukuba, Japan
    • Year and Date
      2008-09-24
  • [Presentation] Endotaxial Nanoclustering of MnAs in Lattice-Mismatched Semiconductor Layers during Metal-Organic Vapor Phase Epitaxy2008

    • Author(s)
      Shinjiroh Hara
    • Organizer
      2008 International Conference on Electronic Materials (ICEM 2008)
    • Place of Presentation
      Hilton Sydney, Sydney, Australia
    • Year and Date
      2008-07-29
  • [Presentation] Structural and Magnetic Characterizations of Ferromagnetic MnAs/GaAs Nanoclusters Formed by Selective-Area MOVPE2008

    • Author(s)
      Shinjiroh Hara
    • Organizer
      14th International Conference on Metal-Organic Vapor Phase Epitaxy (ICMOVPE-XIV)
    • Place of Presentation
      Arsenal, Metz, France
    • Year and Date
      2008-06-03
  • [Presentation] Position-Controlled Growth of GaAs Nanowires on Si (111)by Selective-Area Metal-Organic Vapor Phase Epitaxy2008

    • Author(s)
      Katsuhiro Tomioka
    • Organizer
      14th International Conference on Metal-Organic Vapor Phase Epitaxy(ICMOVPE-XIV)
    • Place of Presentation
      Arsenal, Metz, France
    • Year and Date
      2008-06-03
  • [Presentation] Fabrication and Optical Characterization of InGaAs Nanowires by Selective-Area MOVPE2008

    • Author(s)
      Takuya Sato
    • Organizer
      14th International Conference on Metal-Organic Vapor Phase EDitaxv (ICMOVPE-XIV)
    • Place of Presentation
      Arsenal, Metz, France
    • Year and Date
      2008-06-03

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Published: 2010-06-11   Modified: 2016-04-21  

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