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Analysis of Electron Conduction Band of Electro-conductive Ceramics by X-ray Absorption

Research Project

Project/Area Number 05805054
Research Category

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

Allocation TypeSingle-year Grants
Research Field Inorganic materials/Physical properties
Research InstitutionThe University of Tokyo

Principal Investigator

HASHIMOTO Takuya (1994)  The University of Tokyo, College of Arts and Sciences, Research Associate, 教養学部, 助手 (20212136)

橋本 拓也 (1993)  東京大学, 教養学部, 助手 (40202254)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsBaPb_<1-x>Bi_xO_<3-delta> / Oxygen deficiency / MgIn_2O_4 / X-ray absorption / Thermopower / Thermobalance / Electronic structure / Electronic conductivity / BaPb_<1-X>Bi_XO_<3-δ> / MgIn_2O_<4-δ> / 高温熱天秤 / BaPb_<1-X>Bi_xO_<3-σ> / MgIn_2O_<4-σ> / 薄膜合成
Research Abstract

Electron conduction bands of electro-conductive ceramics, such as MgIn_2O_<4-delta> and BaPb_<1-x>Bi_xO_<3-delta>, were analyzed mainly by X-ray absorption. The former is the newly discovered transparent conductor, and the latter is classical superconducting oxide.
1. Transparent thin film of MgIn_2O_<4-delta> was successfully prepared for the first time. Large progress not only for application but for fundamental research could be made.
2. X-ray absorption of the thin film of MgIn_2O_<4-delta> was measured and pre-edge peak was observed in In-L absorption edge. It was revealed that conduction band consisted mainly of In 5s orbital.
3. Relationship between crystal structure and electronic conduction behavior of BaPb_<1-x>Bi_xO_<3.00> was revealed by X-ray diffraction and electron conduction measurement. Measured X-ray absorption spectroscopy consisted with electronic structure of conduction band, which was deduced from the above clarified relationship.
4. In order to clarify the influence … More of oxygen deficiency on electronic band structure of BaPb_<0.75>Bi_<0.25>O_<3-delta>, X-ray absorption spectroscopes were measured on the samples with various oxygen deficiency, delta. There were little variation in line shape of X-ray absorption by delta, which suggested that variations of electron carrier concentration and orbitals which composed the conduction band were negligible.
5. Besides X-ray absorption, thermobalance, electronic conduction at high temperature and Seebeck coefficient of BaPb_<0.75>Bi_<0.25>O_<3-delta> were measured. It was revealed that oxygen deficiency worked as scattering center rather than electron carrier generation. These results consisted with that of X-ray absorption spectroscopy.
6. Coexistence of electrons with large mobility and holes with low mobility in BaPb_<0.75>Bi_<0.25>O_<3-delta> was revealed from the measurement of temperature dependence of Seebeck coefficients. This information might be useful for the analysis of superconducting transition mechanism. Less

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] H. Un'no et al: "Preparation of MgIn_2O_<4-X> Thin Films on Glass Substmte by RF-Sputering" Jpn. J. Appl. Phys. 32. L1260-L1262 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al: "Crystal Structure of BaBi_<1-X>Pb_XO_3 and Its Effect on Chemical State of Bi" Rep. Res. Lab. Eng. Mater., TIT. 18. 9-14 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al.: "Effect of Oxygen-Deficiency on the Structure and Conduction Behavior of BaPb_<0.75>Bi_<0.25>O_<3-δ>" Solid State Commun.87. 251-254 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al: "Oxygen Deficiency in BaBi_<0.25>Pb_<0.75>O_<3-δ> and Its Effect on the Conduction Behavior and Crystal Structure" Rep. Res. Lab. Eng. Mater., TIT. 19. 19-27 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al.: "Effect of Substitution of Bi with Pb in BaBi_<1-X>Pb_XO_3 on Crystal Structure and Conduction Behavior" Physica C. 223. 131-139 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al: "Coexistence of electrons and holes in BaBi_<0.25>Pb_<0.75>O_<3-δ> detected by thermoelecric-power measurement" Phys. Rev. B. 51. 576-580 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al: "J. Phys. Chem. Solids" Analysis of Role of Oxygen Deficiency on Crystal Structure and Conduction Mechanisin of BaBi_<0.25>Pb_<0.75>O_<3-δ>, ((in press))

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T. Hashimoto et al: "J. Solid State Chem." Reversible Structural Phase Transition of BaPb_<0.75>Bi_<0.25>O_<3.00> around 360℃, ((in press))

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Un'no et al: "Preparation of MgIn_2O_<4-x> Thin Films on Glass Substrate by RF-Sputtering" Jpn. J.Appl. Phys.vol. 32. L1260-L1262 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Crystal Structure of BaBi_xPb_<1-x>O_3 and Its Effect on Chemical State of Bi" Rep. Res. Lab. Eng. Mater., TIT.vol. 18. 9-14 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Effect of Oxygen-Deficiency on the Structure and Conduction Behavior of BaPb_<0.75>Bi_<0.25>O_<3-delta>" Solid State Commun.vol. 87. 251-254 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Oxygen Deficiency in BaBi_<0.25>Pb_<0.75>O_<3-delta> and Its Effect on the Conduction Behavior and Crystal Structure" Rep. Res. Lab. Eng. Mater., TIT.vol. 19. 19-27 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Effect of Substitution of Bi with Pb in BaBi_<1-x>Pb_xO_3 on Crystal Structure and Conduction Behavior" Physica C. vol. 223. 131-139 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Coexistence of Electrons and Holes in BaBi_<0.25>Pb_<0.75>O_<3-delta> Detected by Thermoelectric-power Measurement" Phys. Rev. B.vol. 51. 576-580 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Analysis of Role of Oxygen Deficiency on Crystal Structure and Conduction Mechanism of BaBi_<0.25>Pb_<0.75>O_<3-delta>" J.Phys. Chem. Solids.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] T.Hashimoto et al: "Reversible Structural Phase Transition of BaPb_<0.75>Bi_<0.25>O_<3.00> around 360゚C" J.Solid. State Chem.(inpress).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Un'no et al: "Preparation of MgIn_2O_<4-X> Thin Films on Glass Substrate by RF-Sputtering" Jpn.J.Appl.Phys.32. L1260-L1262 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hashimoto et al: "Crystal Stnscture of BaBi_<1-X>Pb_XO_3 and Its Effect on Chemical State of Bi" Rep.Res.Lab.Eng.Mater.,TIT. 18. 9-14 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hashimoto et al: "Effect of Oxygen-Deficiency on the Structure and Conduction Behavior of BiPb_<0.75>Bi_<0.25>O_<3-δ>" Solid State Commun.87. 251-254 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hashimoto et al: "Oxygen Deficiency in BaBi_<0.25>Pb_<0.75>O_<3-δ> and Its Effect on the Conduction Behavior and Crystal Structure" Rep.Res.Lab.Eng.Mater.,TIT. 19. 19-27 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hashimoto et al: "Effects of Substitution of Bi with Pb in BaBi_<1-X>Pb_XO_3 on Crystal Structure and Conduction Behavior" Physica C. 223. 131-139 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hashimoto et al: "Coexistence of electrons and holes in BaBi_<0.25>Pb_<0.75>O_<3-δ> detected by thermoelectric-power measurement." Phys.Rev.B. 51. 576-580 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Hashimoto et al: "Analysis of Role of Oxygen Deficiency on Crystal Structure and Conduction Mechanism of BaBi_<0.25>Pb_<0.75>O_<3-δ>" J.Phys.Chem.Solids. (in press).

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Un'no et al.: "Preparation of MgIn_2O_<4-x> Thin Films on Glass Substrate by RF-Sputtering" Jpn.J.Appl.Phys.32. L1260-L1262 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Hashimoto et al: "Crystal Structure of BaBi_<1-x>PbxO_3 and Its Effect on Chemical State of Bi" Rep.Res.Lab.Eng.Mater.,TIT. 18. 9-14 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Hashimoto et al: "Effect of Oxygen-Deficiency on the Structure and Conduction Behavior of BaPb_<0.75>Bi_<0.25>O_<3-σ>" Solid State Commun.87. 251-254 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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