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Study of thermo-electrical transport properties on oxide compounds of filled skutterudite similar structure

Research Project

Project/Area Number 19740214
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Condensed matter physics II
Research InstitutionUniversity of the Ryukyus

Principal Investigator

HEDO Masato  University of the Ryukyus, 理学部, 准教授 (00345232)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,530,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywordsスクッテルダイト構造 / 酸化物 / 熱電材料 / 新奇物性探索 / 熱電能 / 高圧力
Research Abstract

ネオジウム系充填スクッテルダイト様酸化物は原料の反応性がよく、求める結晶構造ができていることを確認した。他にサマリウム系、イットリビウム系も同様である。しかし、未反応の原料と思われる不純物が確認され、単相試料が得られていない。セリウム系は何度も合成を試みたが、出発原料から反応が進まず、試料は得られなかった。微少試料での圧力下熱電能測定システムの開発に成功した。それによって、圧力誘起価数転移物質の相転移に伴う大きな電子状態の変化を観測することに成功した。

Report

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

    (17 results)

All 2009 2008 2007

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (7 results)

  • [Journal Article] Pressure-induced Kondo semiconductor : The filled skutterudite compound CeRu4Sb122009

    • Author(s)
      N. Kurita, M. Hedo, M. Koeda, M. Kobayashi, H. Sato, H. Sugawara, Y. Uwatoko
    • Journal Title

      Physical Review B 79

      Pages: 14441-14441

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Pressure-induced Kondo semiconductor : The filled skutterudite compound CeRu_4Sb_<12>2009

    • Author(s)
      N. Kurita, et.al.
    • Journal Title

      Physical Review B 79

      Pages: 14441-14441

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure-induced Magnetic Transition in a Single Crystal of YbCo2Zn202008

    • Author(s)
      Y. Saiga, K. Matsubayashi, T. Fujiwara, M. Kosaka, S. Katano, M. Hedo, T. Matsumoto, Y. Uwatoko
    • Journal Title

      Journal of Physical Society of Japan 77

      Pages: 53710-53710

    • NAID

      130005436464

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Heat capacity of CeIrSi3 under high pressure2008

    • Author(s)
      F. Tomioka, M. Hedo, I. Umehara, Y. Uwatoko, Y. Takano, Y. Okuda
    • Journal Title

      Journal of Physics and Chemistry of Solids 69

      Pages: 3199-3201

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Anomalously Wide Superconducting Phase of One-Dimensional Organic Conductor (TMTTTF) 2SbF62008

    • Author(s)
      M. Itoi, C. Araki, M. Hedo, Y. Uwatoko, T. Nakamura
    • Journal Title

      Journal of Physical Society of Japan 77

      Pages: 23701-23701

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic properties of Ca3Ru2O7 under uniaxial pressures2008

    • Author(s)
      Y. Yoshida, S. Ikeda, N. Shirakawa, M. Hedo, Y. Uwatoko
    • Journal Title

      Journal of Physical Society of Japan 77

      Pages: 93702-93702

    • NAID

      130005437000

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Heat capacity of CeIrSi_3 under high pressure2008

    • Author(s)
      F. Tomioka, et.al.
    • Journal Title

      Journal of Physics and Chemistry of Solids 69

      Pages: 3199-3201

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic properties of Ca_3Ru_2O_7 under uniaxial pressures2008

    • Author(s)
      Y. Yoshida, et.al.
    • Journal Title

      Journal of Physical Society of Japan 77

      Pages: 93702-93702

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Physical properties of a new cuprate superconductor Pr2Ba4Cu7O15-δ2007

    • Author(s)
      A. Matsushita, K. Fukuda, Y. Yamada, F. Ishikawa, S. Sekiya, M. Hedo and T. Naka
    • Journal Title

      Science and Technology of Advanced Materials 8

      Pages: 477-483

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Physical properties of a new cuprate superconductor Pr_2Ba_4Cu_7O_<15-δ>2007

    • Author(s)
      A. Matsushita. K. Fukuda, Y. Yamada, F. Ishi kawa, S. Sekiya, M. Hedo and T. Naka
    • Journal Title

      Spience and Technology of Advanced Materials 8

      Pages: 477-483

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] Effect of pressure on thermopower and electrical resistivity of YbMn_2Ge_22009

    • Author(s)
      M. HEDO, et.al.
    • Organizer
      25th International conference on Low Temper ature Physics (LT25)
    • Place of Presentation
      Amsterdam, Netherlands
    • Year and Date
      2009-08-08
    • Related Report
      2008 Annual Research Report
  • [Presentation] Pr0.5Sr0.5MnO3の高圧下磁化測定2008

    • Author(s)
      能政北斗,梅原出,CAO Shi-Xun,辺土正人,上床美也
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-20
    • Related Report
      2008 Final Research Report
  • [Presentation] YbCo2Zn20における高圧下物性測定2008

    • Author(s)
      松林和幸,才賀裕太,藤原哲也,辺土正人,梅原出,松本武彦,上床美也
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-20
    • Related Report
      2008 Final Research Report
  • [Presentation] Effect of pressure on thermopower and electrical resistivity of YbMn2Ge22008

    • Author(s)
      T. Nakama, M. Hedo, D. Nakamura, Y. Takaesu, K. Yagasaki, T. Fujiwara, and Y. Uwatoko
    • Organizer
      25th International conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam, Netherlands
    • Year and Date
      2008-08-08
    • Related Report
      2008 Final Research Report
  • [Presentation] EuCo2P2の圧力中熱電能2008

    • Author(s)
      仲村大,高江洲義尚,辺土正人,仲間隆男,矢ヶ崎克馬,藤原哲也
    • Organizer
      日本物理学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2008 Final Research Report
  • [Presentation] LaRhSi2の低温比熱2008

    • Author(s)
      辺土正人,松林和幸,梅原出,木村憲彰,上床美也
    • Organizer
      日本物理学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2008 Final Research Report
  • [Presentation] EuCo_2P_2の圧力中熱電能2008

    • Author(s)
      仲村大, ら
    • Organizer
      日本物理学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2020-05-15  

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