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Fundamental Studies of Development of Quasicrystalline Semiconducting Films

Research Project

Project/Area Number 04402046
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field Physical properties of metals
Research InstitutionNagoya University

Principal Investigator

MIZUTANI Uichiro  Nagoya University, Professor, 工学部, 教授 (00072679)

Co-Investigator(Kenkyū-buntansha) KAYANO Tamotsu  Nagoya University, Assistant Progessor, 工学部, 助手 (00215419)
FUKUNAGA Toshiharu  Nagoya University, Associate Professor, 工学部, 助教授 (60142072)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥34,700,000 (Direct Cost: ¥34,700,000)
Fiscal Year 1993: ¥8,200,000 (Direct Cost: ¥8,200,000)
Fiscal Year 1992: ¥26,500,000 (Direct Cost: ¥26,500,000)
KeywordsQuasicrystals / Approximant Crystals / Semiconducting Films / 半導体 / ホール係数 / 電気伝導度
Research Abstract

Major results obtained are summarized below.
1. The stable composition range of quasicrystalline and approximant phases has been determined in the totally five systems Al-Mg-Zn, Al-Mg-Cu, Al-Mg-Ag, Al-Mg-Pd and Mg-Ga-Zn by using mechanical alloying technique. It is found that the stable quasicrystal is formed when the special condition is fulfillled : the electron concentration is in the range 2.15<e/a<2.20 and the Mg content slightly higher than that of the approximant phase.
2. Both RT-and Ml-type quasicrystals have been prepared by liquid quenching technique in the Al-Mg-Zn, Al-Mg-Cu and Al-Mg-Pd and Al-Mg-Pd, Al-Cu-Ru and Al-Pd-Re, respectively. The valence band structure has been studied by XPS, SXS and electronic specific heat measurements. It is found that the valence band structure is described by the free electron picture except for the presence of the pseudogap near the fermi level in the RT-type quasicrystals. The d-band in the Ml-type quasicrystals is widely spread over the valence band energy range and the Al-3p electron distribution is heavily distorted from the free electron-ike one observed in pure Al. As a result, the spiky density of states is sharpened in the Ml-type quasicrystals as compared with the free electron-like RT-type quasicrystals.
3. The characteristic features of the valence band structure for Ml- and RT-type quasictystals observed by the above measurements have been reflected in the electron transport properties. The conductivity and electronic specific heat coefficient have been well described by the carrier concentration deduced from the Hall coefficient, regardless of whether Ml-or RT-types are involved. From this we conclude that either electrons or holes dominate at the Femi level in most quasicrystals.
4. We could successfully synthesize the Al-Od-Mn thin films by laser abration method.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] T.Matsuda: "Effects of Structural Quality and Lattice Periodicity on Electronic Properties in Mg-Ga-Al-Zn Quasicrystalline and Approximant Phases" Materials Transactions,JIM. 34. 95-101 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in Mg-Al-Zn Alloy System" Materials Transactions,JIM. 34. 102-108 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Electron Transport in Non-Periodic Metallic Systems:Amorphous Alloys and Quasicrystals" Physica Status Solidi(b). 176. 9-30 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Electron Transport in Non-Periodic Systems Including Amorphous Metals and Quasicrystals" Materials Science and Engineering. B19. 82-89 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Electronic Structure and Electron Transport Properties of Quasicrystals and Approximant Crystals in Al-TM and Mg-Ga-Al-Zn Alloy Systems" Journal of Non-Crystalline Solids. 156-158. 882-886 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Takeuchi: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in Mg-Al-Zn Alloy System" Journal of Non-Crystalline Solids. 156-158. 914-917 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Electronic Properties of Liquid,Amorphous and Quasicrystalline Alloys Electronic and Magnetic Properties of Metals and Ceramics Part II" edited by R.W.Cahn,P.Haasen and E.J.Kramer(VCH,ドイツ), 625 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Matsuda, U.Mizutani, K.Hashimoto, Y.Itoh and K.Hiraga: "Effects of Structural Quality and Lattice Periodicity on Electronic Properties in Mg-Ga-Al-Zn Quasicrystalline and Approximant Phases" Materials Transactions. JIM 34. 95-101 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani, T.Takeuchi and T.Fukunaga: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in Mg-Al-Zn Alloy System" Materials Transactions. JIM 34. 102-108 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Election Transport in non-periodic Metallic Systems : Amorphous Alloys and Quasicrystals" Physica Status Solidi(b). 176. 9-30 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Electron Transport in Non-Periodic Systems Including Amorphous Metals and Quasicrystals" Materials Science and Engineering. B19. 82-89 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani, T.Matsuda, Y.Itoh, K.Tanaka, H.Domae, T.Mizuno, S.Murasaki, Y.Miyoshi, K.Hashimoto and Y.Yamada: "Electronic Structure and Electron Transport Properties of Quasicrystals and Approximant Crystals in Al-TM and Mg-Ga-Al-Zn Alloy Systems" Journal of Non-Crystalline Solids. 156-158. 882-886 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Takeuchi, S.Murasaki, A.Matsumuro and U.Mizutani: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in Mg-Al-Zn Alloy System" Journal of Non-Crystalline Solids. 156-158. 914-917 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] U.Mizutani: "Electronic Properties of Liquid, Amorphous and Quasicrystalline Alloys" edited by R.W.Cahn, P.Hassen and E.J.Kramer (VCH, GERMANY 1993) Electronic and Magnetic Properties of MEtals and Ceramics PArt II. (Volume 3B), Chapter 9. 97-157

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Matsuda: "Effects of Structural Quality and Lattice Periodicity on Electronic Properties in Mg-Ga-Al-Zn Quasicrystalline and Approximant" Materials Transactions,JIM. 34. 95-101 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] U.Mizutani: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in Mg-Al-Zn Alloy System" Materials Transactions,JIM. 34. 102-108 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] U.Mizutani: "Electron Transport in Non-Periodic Metallic Systems:Amorphous Alloys and Quasicrystals" Physica Status Solidi(b). 176. 9-30 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] U.Mizutani: "Electron Transport in Non-Periodic Systems Including Amorphous Metals and Quasicrystals" Materials Science and Engineering. B19. 82-89 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] U.Mizutani: "Electronic Structure and Electron Transport Properties of Quasicrystals and Approximant Crystals in Al-TM and Mg-Ga-Al-Zn" Journal of Non-Crystalline Solids. 156-158. 882-886 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Takeuchi: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in Mg-Al-Zn Alloy System" Journal of Non-Crystalline Solids. 156-158. 914-917 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] U.Mizutani: "Electronic Properties of Liquid,Amorphous and Quasicrystalline Alloys" VCH,ドイツ, 625 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 水谷 宇一郎: "Electronic Specific Hear Measurements for Quasicrystals and Frank Kasper Crystals in Mg-Al-Ag,Mg-Al-Zn,Mg-Ga-Zn and Al-Li-Cu alloy Sestems" J.Phys:Condens.Matter. 3. 3711-3718 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] 水谷 宇一郎: "Atomic and Electronic Properties of Icosahedral Quasicrystals and Crystalline Approximants in Quaternary Mg_<39.5>Zn_<40.0>(Ga_<1-4>Al_4)_<20.5>Alloy System" Proc.of Chlna-Japan Seminars on Quasicrystals(World Scientific). 248-255 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] 水谷 宇一郎: "Formation of Quasicrystals and Approximant Crystals by Mechanical Alloying in the Mg-Al-Zn Alloy System" Materials Trans.JIM. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 竹内 恒博: "Studies of Mg-Based Icosahedral Quasicrystals and Approximant Crystals Stynthesized by Mechanical Alloying Process" The 8th Int.Conf.on Rapidly Quenched and Metastable Materials(SENDAI). (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 水谷 宇一郎: "Electron Transport Propertics of Thermodynamically Stable Al-Cu-Ru Icosahedral Quasicrystals" J.Phys.:Condens.Matter. 2. 6169-6178 (1991)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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