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1997 Fiscal Year Final Research Report Summary

THE STUDY FOR THE MECHANISM OF ABNOMAL PHYSICAL PROPERTIES IN 4f-AND 3d-CHALCOGENIDES AND PNICTIDES

Research Project

Project/Area Number 07404016
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SUZUKI Takashi  GRADUETE SCHOOL OF SCIENCE.TOHOKU UNIVERSITY.DEPARTMENT OF PHYSICS,PROFESSOR, 理学研究科, 教授 (30004344)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Hisao  GRADUETE SCHOOL OF SCIENCE.TOHOKU UNIVERSITY.DEPARTMENT OF PHYSICS : RESEARCH AS, 大学院・理学研究科, 助手 (40250675)
TAKAGI Shigeru  GRADUETE SCHOOL OF SCIENCE.TOHOKU UNIVERSITY.DEPARTMENT OF PHYSICS : ASSOCIATED, 大学院・理学研究科, 助教授 (20154750)
KASAYA Mituo  GRADUETE SCHOOL OF SCIENCE.TOHOKU UNIVERSITY.DEPARTMENT OF PHYSICS : PROFESSOR, 大学院・理学研究科, 教授 (20004351)
KAMIMURA Takashi  GRADUETE SCHOOL OF SCIENCE.TOHOKU UNIVERSITY.DEPARTMENT OF PHYSICS : PROFESSOR, 大学院・理学研究科, 教授 (30005813)
Project Period (FY) 1995 – 1997
Keywords4F ELECTRON SYSTEM / 3d ELECTRON SYSTEMS / CHALCOGENIDES / PNICTIDES / ABNORMAL MAGNETISM / LOW CARRIER SYSTEMS / METAL-INSULATOR TRANSITION / de Haas Alphen effect
Research Abstract

The most important work in this project was to construct the furnace which can produced high quality single crystals of the chalcogenides and pnictides in f-and d- electron systems. The key points to successfully complete this furnace were how to attain ultra high temperature up to 3000C in stable because of the ultra high melting point of those chalcogenides and pnictides. The difficulty come from the strong increasing radiation loss at such a high temperature. There were not suitable radiation shield materials. After many efforts we could overcome this difficulty by finding the excellent radiation shield of p-BN cylinder coated inside wall with tungsten thin flint The input HF power can easily come to the crucible hung inside cylinder but radiation can not escape through this thin film due to skin depth. Then we have gotten the 3000C in stable for many days contineously.
After successful construction this furnace, we could several high quality single crystals and investigate the many physical properties and made many new discovering.
First of all, We have succeeded to grow high quality single crystal CeP and found most complicated magnetic phase diagrams so far. Neutron diffraction experiment reveals these magnetic structures to be stripe of the double layer with ferromagnmetically alline large magnetic moment and integer layers (this integer are changed to low number successively by applied magnetic fields or pressure bellow 11) with antiferromagnetically allin smaller magnetic moments. De Hass van Alphen effects reveal the electronic structure. NMR and ESR measurement also show micro-mechanism of complicated exchenge interaction.
We also found the electric quadrupole order in TmTe with octapole interaction. During insulator-metal transition in TmTe, strong ferromagnetism appeared and extremely abnormal transport properties are seen.
Other many prominent results are described in the report of this project including 140 publisheed

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] T.Matsumura: "Quadrupolar ordering in TmTe" Physica B. 223 & 224. 385-388 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Kumigashira: "High resolution angle-resolved photoelectron spectroscopy of CeBi" Phys.Rev.B. 54. 9341-9345 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Terashima: "Fermi surface and magnetic phases of the low-carrier-density strongly correlated electron system CeP" Phys.Rev.B. 55. 4197-4205 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kohgi: "One dimensional antiferromagnetic coupling in the low carrier heavy electron system" Phys.Rev.B. 56. R11388-R11391 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kubota: "Impact of La substitution on the magnetic structure of a low-carrier-density Kondo system: Ce0.9La0.1P" Phys.Rev B. 58. Rapid Comm.1-4 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Kumigashira: "High-resolution angle-resolved photoemission study of LaSb" Phys.Rev.B. 58. 7675-7680 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Matsumura, S.Nakamura, T.Goto, H.Shida, T.Suzuki: "Quadrupolar ordering in TmTe" Physica B. 223 & 224. 385-388 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Kumigashira, S.-H.Yang, T.Yokoya, A.Chainani, T.Takahasshi, A.Uesawa and T.Suzuki: "High resolution angle-resolved photoelectron spectroscopy of CeBi" Phys.Rev.B. 54. 9341-9345 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Terashima, S.Uji, H.Aoki, W.Joss, Y.Haga, A.Uesawa and T.Suzuki: "Fermi surface and magnetic phases of the low-carrier-density strongly correlated electron system CeP" Phys.Rev.B. 55. 4197-4205 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Kohgi, K.Iwasa, J.-Mignot, A.Ochiai, T.Suzuki: "One dimensional antiferromagnetic coupling in the low carrier heavy electron system" Phys.Rev.B. 56. R11388-R11391 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Kubota, Y.Oohara, and H.Yoshizawa, N.Mori, H.Takahashi, A.Uesawa and T.Suzuki: "Impact of La substitution on the magnetic structure of a low-carrier -density Kondo system : Ce0.9La0.1P" Phys.Rev.B Rapid Comm.58. 1-4 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Kumigashira, Hyeong-Do Kim, T.Ito, A.Ashihara, T.Takahashi, T.Suzuki, M.Nishihara, and O.Sakai: "High-resolution angle-resolved photomission study of LaSb" Phys.Rev.B. 58. 7675-7680 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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