• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Formation of an Energy Gap in the Valence-Fluctuating System CeNiSn

Research Project

Project/Area Number 01460035
Research Category

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

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionHiroshima University

Principal Investigator

TAKABATAKE Tosiro  Fac. Integr. Arts & Sci., Assoc. Prof., 総合科学部, 助教授 (40171540)

Co-Investigator(Kenkyū-buntansha) SUZUKI Takasi  Fac. Science, Research Assoc., 理学部, 助手 (00192617)
MAENO Yositeru  Fac. Science, Assoc. Prof., 理学部, 助教授 (80181600)
SAKURAI Junji  Fac. Science, Assoc. Prof., 理学部, 助教授 (30033814)
FUJII Hironobu  Fac. Integr. Arts & Sci., Prof., 総合科学部, 教授 (30034573)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥6,400,000 (Direct Cost: ¥6,400,000)
KeywordsCerium Compound / Kondo Lattice / Valence Fluctuation / Heavy Fermion / Spin Correlation / Specific Heat / Single Crystal / Energy Gap / 高磁場 / 帯磁率 / 電気抵抗 / 熱電能
Research Abstract

Measurements of susceptibility chi, resistivity rho and thermoelectric power S have been performed on single-crystal CeNiSn. Only along the a axis of the orthorhombic structure, chi (T) and rho (T) do exhibit pronounced peaks at 12 K, whereas no anomaly was found in the specific heat. The gap energies estimated from rho (T) are 2.4, 5.5 and 5.0 K along the a, b and c axes, respectively. Near 3 K, S_a (T) and S_c (T) exhibit extremely sharp peaks indicating the presence of a density of states within the gap. The magnetic contribution to the specific heat divided by temperature, C_m/T, vs T reveals a maximum of 0.19 J/K^2 mol near 6.7 K. These results suggest that an antiferromagnetic correlation develops near 12 K which induces the formation of the pseudo-gap in the narrow band of heavy quasi-particles.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] T.Takabatake: "Formation of an anisotropic energy gap in the valenceーfluctuating system CeNiSn" Phys.Rev.B. 41. 9607-9610 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y.Yamaguchi: "Thermopower of several ternary compounds of cerium and uranium Cetx and utx(T:N:,Pd or Pt;X= In or Sn)" J.Phys.Cond.Matt.2. 5715-5721 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Kyogaku: "NMR investigation of energy gap formation in the valence fluctuating compound CeN:Sn" J.Phys.Soc.Japan. 59. 1728-1732 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Takabatake: "Kondo effect and crystalーfield effect in CeNi_2Sn_2" J.Magn.Magn.Mat.90&91. 474-476 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Takabatake: "Anisotropic suppression of the energy gap in CeN:Sn by high magnetic fields" Phys.Rev.B.43. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Takabatake: "Magneto resistance and Hall effect in the Kondoーlattice system CeN:Sn with an anisotropic energy gap" J.Magn.Mag.Mat.(1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Takabatake, F. Teshima, H. Fujii, S. Nishigori, T. Suzuki, T. Fujuta, Y. Yamaguchi, J. Sakurai and D. Jaccard: "Formation of an Anisotropic Energy Gap in the Valence-Fluctuating System CeNiSn" Phys. Rev. B41. 9607-9610 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. Yamaguchi, J. Sakurai, F. Teshima, H. Kawanaka, T. Takabatake and H. Fujii: "Thermopower of Several Ternary Compounds of Cerium and Uranium : CeTX and UTX (T=Ni, Pd or Pt ; X=In or Sn)" J. Phys. Condens. Matter. 2. 5715-5721 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Kyogaku, Y. Kitaoka, H. Nakamura, K. Asayama, T. Takabatake, F. Teshima, H. Fujii: "NMR Investigation of Energy Gap Formation in the Valence Fluctuating Compound CeNiSn" J. Phys. Soc. Jpn.59. 1728-1732 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Kyogaku, Y. Kitaoka, H. Nakamura, K. Asayama, F. Teshima, T. Takabatake, H. Fujii, Y. Yamaguchi and J. Sakurai: "Magnetic Phase Transition in CeTSn (T=Pd. Pt. Ni)" J. Magn. Mat.90 & 91. 487-489 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Takabatake, F. Teshima, H. Fujii, S. Nishigori, T. Suzuki, T. Fujita, Y. Yamaguchi and J. Sakurai: "Kondo Effect and Crystal-Field Effect in CeNi_2Sn_2." J. Magn. Magn. Mat. 90 & 91. 474-476 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Kyogaku, Y. Kitaoka, H. Nakamura, K. Asayama, T. Takabatake, F. Teshima and H. Fujii: "NMR Study od Quasiparticle Gap in CeNiSn" Physica B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Y. Uwatoko, G. Oomi, T. Takabatake, F. Teshima and H. Fujii: "Thermal Expansion of CeNiSn Single Crystal" J. Jpn. Inst. Metals.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Takabatake, M. Nagasawa, H. Fujii, G. Kido, M. Nohara, T. Suzuki, T. Fujita, K. Fraas, U. Ahlheim, C. Geibel and F. Steglich: "Anisotropic Suppression of the Energy Gap in CeNiSn by High Magnetic Fields" Phys Rev. B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T.Takabatake: "Formation of an anisotropic energy gap in the valenceーfluctuating system CeNiSn" Phys.Rev.B. 41. 9607-9610 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Y.Yamaguchi: "Thermopower of several ternary compounds of cerium and urarium CeTX and UTX(T:Ni,Pd or Pt;X=In or Sn)" J.Phys.Cond.Matt. 2. 5715-5721 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Kyogaku: "NMR investigation of energy gap formation in the valence fluctuating compound CeNiSn" J.Phys.Soc.Japan. 59. 1728-1732 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takabatake: "Kondo effect and crystalーfield effect in CeNi_2 Sn_2" J.Magn.Magn.Mat.90&91. 474-476 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takabatake: "Anisotropic suppression of the energy gap in CeNiSn by high magnetic fields" Phys.Rev.B.43. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takabatake: "Magneto resistance and Hall effect in the kondoーlattice system CeNiSn with an anisotropic energy gap" J.Magn.Mag.Mat.(1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Takabatake: "Formation of an anisotropic energy gap in the valence-fluctuating system CeNiSn" Phy.Rev.B. B41. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] J.Sakurai: "Thermopower of Several Ternary Compounds of Cerium and Uranium CeTX and UTX(T:Ni,Pd or Pt and X:In or Sn)" J.Phys.Cond.Matt.2. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] M.Kyogaku: "NMR Investigation of Energy Gap Formation in the Valence Fluctuating Compound CeNiSn" J.Phys.Soc.Japan. 59. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Takabatake: "Anisotropic Kondo Effect and Crystal-Field Effect in CeNi_2Sn_2" J.Magn.Magn.Matt.84. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] M.Kyogaku: "Magnetic Phase Transition in CeTSn(T=Pd,Pt and Ni)" J.Magn.Magn.Matt.84. (1990)

    • Related Report
      1989 Annual Research Report

URL: 

Published: 1989-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi