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2008 Fiscal Year Final Research Report

Control of magnetism of ferromagnetic semiconductors by co-doping and its application to an electric-control magnetic device

Research Project

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Project/Area Number 18360006
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied materials science/Crystal engineering
Research InstitutionUniversity of Tsukuba

Principal Investigator

TAKITA Koki  University of Tsukuba, 名誉教授 (00011213)

Co-Investigator(Kenkyū-buntansha) KURODA Shinji  筑波大学, 大学院・数理物質科学研究科, 教授 (40221949)
TAKAMASU Tadashi  筑波大学, 物質・材料研究機構量子ドットセンターグループリーダー (60212015)
Project Period (FY) 2006 – 2008
Keywordsスピントロニクス
Research Abstract

強磁性半導体(Zn,Cr)Teにおける荷電性の不純物ドーピングによる磁性の変化を調べた。(Zn,Cr)Teにアクセプター性不純物である窒素をドープすると強磁性が抑制されるが、分子線エピタキシー法により成長した窒素ドープ(Zn,Cr)Teにおいて、窒素のドーピング量と強磁性特性との定量的関係より、窒素ドーピングに伴うCrイオンの価数変化と強磁性抑制との関係を解析し、この系の強磁性メカニズムについての考察を行った。さらに、(Zn,Cr)Te層と非磁性半導体である窒素ドープ(Zn,Mg)Te層からなるρ型の変調ドープヘテロ構造を作製し、ヘテロ界面に生成される2次元正孔により(Zn,Cr)Te層の強磁性が抑制されることを明らかにした。

  • Research Products

    (37 results)

All 2009 2008 2007 2006

All Journal Article (10 results) Presentation (26 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Fluorescence XAFS analysis of local structures in iodine-doped Zn_<1-x>Cr_xTe2009

    • Author(s)
      H. Ofuchi, K. Ishikawa, K. Zhang, S. Kuroda, M. Mitome, Y. Bando
    • Journal Title

      Journal of Physics : Conference Series 190

      Pages: 1-4

  • [Journal Article] Formation of Cr-rich nano-clusters and columns in (Zn, Cr) Te grown by MBE2009

    • Author(s)
      Y. Nishio, K. Ishikawa, S. Kuroda, M. Mitome, Y. Bando
    • Journal Title

      Materials Research Society Symposium Proceedings vol. 1183

      Pages: 1-6

  • [Journal Article] Inhomogeneous Cr distribution and superparamagnetic behavior in magnetic semiconductor (Zn, Cr) Te2009

    • Author(s)
      K. Ishikawa, N. Nishizawa, S. Kuroda, H. Ikeda, K. Takita, M. Mitome, Y. Bando, T. Dietl
    • Journal Title

      Physics of Semiconductors, AIP Conference Proceedings vol. 1199

      Pages: 419-420

  • [Journal Article] Correlation between Cr Distribution and Ferromagnetism in Iodine-Doped (Zn, Cr) Te2008

    • Author(s)
      N. Nishizawa, K. Ishikawa, S. Kuroda, M. Mitome, Y. Bando, T. Dietl
    • Journal Title

      Journal of the Korean Physical Society 53

      Pages: 2917-2920

  • [Journal Article] Magneto-optical properties of ntype modulation-doped (Cd, Cr) Te quantum well2008

    • Author(s)
      F. Takano, T. Nishizawa, J. W. Lee, S. Kuroda, Y. Imanaka, T. Takamasu, H. Akinaga
    • Journal Title

      Physica E 40

      Pages: 1166-1168

  • [Journal Article] Correlation between ferromagnetism and cluster formation in (Zn, Cr) Te co-doped with charge impurities2007

    • Author(s)
      N. Nishizawa, S. Kuroda, K. Takita, M. Mitome, Y. Bando, T. Dietl
    • Journal Title

      Materials Research Society Symposium Proceedings vol. 999

      Pages: 1-5

  • [Journal Article] Origin and control of high temperature ferromagnetism in semiconductors2007

    • Author(s)
      S. Kuroda, N. Nishizawa, K. Takita, M. Mitome, Y. Bando, K. Osuch, T. Dietl
    • Journal Title

      Nature Materials 6

      Pages: 440-446

  • [Journal Article] Fluorescence XAFS stury on local study around Cr atoms doped in ZnTe AIP Conference Proceedings2007

    • Author(s)
      H. Ofuchi, N. Ozaki, N. Nishizawa, H. Kinjyo, S. Kuroda, K. Takita
    • Journal Title

      X-ray Absorption Fine Structure-XAFS13 : 13^<th> International Conference vol. 882

      Pages: 517-519

  • [Journal Article] Magneto-optical study of ferromagnetic semiconductor (Zn, Cr) Te2007

    • Author(s)
      N. Nishizawa, S. Marcet, N. Ozaki, S. Kuroda, K. Takita
    • Journal Title

      physica status solidi (c) 3

      Pages: 4102-4105

  • [Journal Article] Significant enhancement of ferromagnetism in Zn_<1-x>Cr_xTe doped with iodine as an ntype dopant2006

    • Author(s)
      N. Ozaki, N. Nishizawa, S. Marcet, S. Kuroda, O. Eryu, K. Takita
    • Journal Title

      Physical Review Letters 97

      Pages: 1-4

  • [Presentation] Formation of Cr-rich nano-clusters and columns in (Zn, Cr) Te grown by MBE2009

    • Author(s)
      S. Kuroda, K. Ishikawa, K. Zhang, Y. Nishio, M. Mitome, Y. Bando
    • Organizer
      Materials Research Society (MRS) Spring Meeting
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      20090413-20090417
  • [Presentation] ヨウ素ドープ (Zn, Cr) Teの蛍光XAFS法による局所構造評価2009

    • Author(s)
      大渕博宣, 石川弘一郎, 張珂, 黒田眞司, 三留正則, 板東義雄
    • Organizer
      第56回応用物理学関係連合講演会
    • Place of Presentation
      筑波大学
    • Year and Date
      20090330-20090402
  • [Presentation] 磁性半導体 (Zn, Cr) Teにおける Cr凝集クラスターの形成と超常磁性2009

    • Author(s)
      黒田眞司, 石川弘一郎, 張珂, 西尾陽太郎
    • Organizer
      第56回応用物理学関係連合講演会
    • Place of Presentation
      筑波大学
    • Year and Date
      20090330-20080402
  • [Presentation] 「半導体における磁性元素の高濃度ドーピングと非一様分布」(シンポジウム「高濃度ドーピングへの挑戦とそれに伴う格子欠陥の解決」)2009

    • Author(s)
      黒田眞司
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学、立教池袋中学・高校
    • Year and Date
      20090327-20090330
  • [Presentation] 軟X線磁気円二色性を用いたZn_<1-x>Cr_xTe薄膜の電子状態に関する研究2009

    • Author(s)
      山崎陽, 片岡隆史, 坂本勇太, 藤森淳, F.-H. Chang, H.-J. Lin, D. J. Huang, C. T. Chen, 石川弘一郎, 黒田眞司
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学、立教池袋中学・高校
    • Year and Date
      20090327-20090330
  • [Presentation] (Zn, Cr) TeにおけるCr-richナノカラムの形成と磁化特性2009

    • Author(s)
      張珂, 西尾陽太郎, 及川晴義, 石川弘一郎, 黒田眞司, 三留正則, 板東義雄
    • Organizer
      第13回半導体スピン工学の基礎と応用 (PASPS-13)
    • Place of Presentation
      東北大学電気通信研究所
    • Year and Date
      20090127-20090128
  • [Presentation] Inhomogeneous Cr distribution and superparamagnetic properties of (Zn, Cr) Te2008

    • Author(s)
      S. Kuroda, K. Ishikawa, M. Mitome, Y. Bando
    • Organizer
      53^<rd> Annual Conference on Magnetism and Magnetic Materials (MMM-53)
    • Place of Presentation
      Austin, USA
    • Year and Date
      20081110-20081114
  • [Presentation] (Zn, Cr) Teにおける高Cr組成の柱状領域の形成2008

    • Author(s)
      石川弘一郎, 張珂, 黒田眞司, 三留正則, 板東義雄
    • Organizer
      第69回応用物理学学術講演会
    • Place of Presentation
      中部大学
    • Year and Date
      20080902-20080905
  • [Presentation] Magnetic properties of magnetic semiconductors with inhomogeneous distribution of magnetic elements2008

    • Author(s)
      K. Ishikawa, S. Kuroda
    • Organizer
      5^<th> International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-V)
    • Place of Presentation
      Foz do Iguacu, Brazil
    • Year and Date
      20080803-20080806
  • [Presentation] Control of nanocluster formation and ferromagnetic properties in diluted magnetic semiconductors (invited)2008

    • Author(s)
      S. Kuroda
    • Organizer
      29^<th> International Conference on the Physics of Semiconductors (ICPS-29)
    • Place of Presentation
      Rio de Janeiro, Brazil
    • Year and Date
      20080727-20080801
  • [Presentation] Inhomogeneous Cr distribution and superparamagnetic behaviors in magnetic semiconductor (Zn, Cr) Te2008

    • Author(s)
      K. Ishikawa, N. Nishizawa, S. Kuroda, K. Ikeda, K. Takita, M. Mitome, Y. Bando, T. Dietl
    • Organizer
      29^<th> International Conference on the Physics of Semiconductors (ICPS-29)
    • Place of Presentation
      Rio de Janeiro, Brazil
    • Year and Date
      20080727-20080801
  • [Presentation] 強磁性半導体 (Zn, Cr) Teの磁場中反射スペクトル測定2008

    • Author(s)
      清水翔, 西沢望, 黒田眞司, 高増正
    • Organizer
      第55回応用物理学関係連合講演会
    • Place of Presentation
      日本大学理工学部
    • Year and Date
      20080327-20080330
  • [Presentation] 高Cr組成 (~20%) の (Zn, Cr) TeにおけるCr分布と強磁性特性の相関2008

    • Author(s)
      石川弘一郎, 西沢望, 黒田眞司, 池田博, 三留正則, 板東義雄
    • Organizer
      第55回応用物理学関係連合講演会
    • Place of Presentation
      日本大学理工学部
    • Year and Date
      20080327-20080330
  • [Presentation] 「磁性半導体における磁性元素の不均一分布と強磁性特性」(シンポジウム「スピントロニクスはどこまで進んだか」)2008

    • Author(s)
      黒田眞司, 西沢望, 瀧田宏樹, 三留正則, 板東義雄, トーマス・ディートル
    • Organizer
      第55回応用物理学関係連合講演会
    • Place of Presentation
      日本大学理工学部
    • Year and Date
      20080327-20080330
  • [Presentation] 磁性半導体における磁性元素の不均一分布と強磁性特性 (招待講演)2008

    • Author(s)
      黒田眞司
    • Organizer
      日本物理学会第63回年次大会
    • Place of Presentation
      近畿大学
    • Year and Date
      20080322-20080326
  • [Presentation] ヨウ素ドープ (Zn, Cr) TeにおけるCr組成分布と強磁性特性の成長条件依存性2007

    • Author(s)
      石川弘一郎, 西沢望, 黒田眞司, 池田博, 三留正則, 板東義雄
    • Organizer
      第12回半導体スピンエ学の基礎と応用 (PASPS-12)
    • Place of Presentation
      大阪大学
    • Year and Date
      20071220-20071221
  • [Presentation] Control of nanocluster formation and ferromagnetic properties by co-doping charge impurities in ferromagnetic semiconductors (Zn, Cr) Te (invited)2007

    • Author(s)
      S. Kuroda
    • Organizer
      Polish-Japanese Joint Seminar "Ferromagnetism and Magnetic Nanostructures in Semiconductors"
    • Place of Presentation
      Leszno, Poland
    • Year and Date
      20070927-20070928
  • [Presentation] Correlation between Cr distribution and ferromagnetism in iodine-doped (Zn, Cr) Te2007

    • Author(s)
      N. Nishizawa, K. Ishikawa, S. Kuroda, M. Mitome, Y. Bando, T. Dietl
    • Organizer
      13^<th> International Conference on II-VI Compounds (II-VI 2007)
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      20070910-20070914
  • [Presentation] ヨウ素ドープ (Zn, Cr) TeにおけるCr組成分布と強磁性特性のMBE成長温度依存性2007

    • Author(s)
      石川弘一郎, 西沢望, 黒田眞司, 池田博, 三留正則, 板東義雄
    • Organizer
      第68回応用物理学会学術講演会
    • Place of Presentation
      北海道工業大学
    • Year and Date
      20070904-20070908
  • [Presentation] Correlation between ferromagnetism and cluster formation in (Zn, Cr) Te co-doped with charge impurities2007

    • Author(s)
      S. Kuroda, N. Nishizawa, K. Takita, M. Mitome, Y. Bando
    • Organizer
      Materials Research Society (MRS) Spring Meeting
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      20070409-20070413
  • [Presentation] Effects of co-doping on ferromagnetism in (Zn, Cr) Te (invited)2007

    • Author(s)
      S. Kuroda
    • Organizer
      American Physical Society (APS) 2007 March Meeting
    • Place of Presentation
      Denver, USA
    • Year and Date
      20070305-20070310
  • [Presentation] Semiconductor spintronics based on ZnTe : the state of the art towards room-temperature ferromagnetism (invited)2006

    • Author(s)
      S. Kuroda
    • Organizer
      Handai International Symposium 'Nanoscience and Nanotechnology
    • Place of Presentation
      Osaka University
    • Year and Date
      20061120-20061122
  • [Presentation] ヨウ素ドープ (Zn, Cr) TeにおけるCr組成の不均一と強磁性特性との相関2006

    • Author(s)
      西沢望, 黒田眞司, 瀧田宏樹, 三留正則, 板東義雄, Tomasz Dietl
    • Organizer
      第67回応用物理学会学術講演会
    • Place of Presentation
      立命館大学
    • Year and Date
      20060829-20060901
  • [Presentation] ZnCrTeの磁性に対する光誘起効果2006

    • Author(s)
      小林紘子, 近藤剛, 宗片比呂夫, 西沢望, 黒田眞司, 滝田宏樹
    • Organizer
      第67回応用物理学会学術講演会
    • Place of Presentation
      立命館大学
    • Year and Date
      20060829-20060901
  • [Presentation] Ferromagnetism in donor and acceptor doped (Zn, Cr) Te (invited)2006

    • Author(s)
      S. Kuroda
    • Organizer
      4^<th> International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors
    • Place of Presentation
      Sendai
    • Year and Date
      20060815-20060818
  • [Presentation] Novel ferromagnetic semiconductor (Zn, Cr) Te-doping of charge impurities and magnetic properties (invited)2006

    • Author(s)
      S. Kuroda
    • Organizer
      25^<th> International School on the Physics of Semiconducting Compounds "Jaszowiec 2006"
    • Place of Presentation
      Jaszowiec, Poland
    • Year and Date
      20060617-20060623
  • [Patent(Industrial Property Rights)] 磁性半導体とその製造方法2007

    • Inventor(s)
      黒田眞司, 西沢望, 瀧田宏樹, 三留正則, 板東義雄, トーマス・ディートル
    • Industrial Property Number
      特願2007-46400
    • Filing Date
      2007-02-27

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Published: 2011-06-18   Modified: 2016-04-21  

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