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Electron spin resonance of valence fluctuating compounds.

Research Project

Project/Area Number 63540240
Research Category

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

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionMiyagi University of Education.

Principal Investigator

CHIBA Yoshiaki  Miyagi Univ. of education, Assoc. Prof., 教育学部, 助教授 (40113881)

Co-Investigator(Kenkyū-buntansha) DATE Muneyuki  Faculty of Science, Osaka Univ. Prof, 理学部, 教授 (80028076)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1989: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1988: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsElectron spin resonance / Valence fluctuating compounds / High-magnetic field ESR / Short range order / g-shift / Electron carrier High-Tc / Disorder site ESR / GdB_6
Research Abstract

1. High-magnetic field ESR High-field ESR spectrometer system using pulse magnet in the Research Center for Extreme Materials, Osaka, University was made to investigate the disappearance of band gap of valence fluctuating compounds. The test investigation is the study of Copper sulfate pentahydrate CuSO_45H_2O. The temperature dependent exchange interaction J_<AB> is found. [J.Phys.Soc.Jpn.57(1988)4366] Now we are using the ESR system to study not only valence fluctuating compounds but also heavy fermion materials.
2.ESR study of GdB_6 The ESR study of GdBe single crystal was done to compare with the RB_6 type valence fluctuation compounds. The paramagnetic resonance of Gd^<3+> and the antiferromagnetic resonance was observed.
3.ESR Study of Nd_2CuO_4 Electron spin resonance of neodymium copper oxide Nd_2CuO_4 is investigated and broad resonance is observed below 30K. The resonance is attributed to the Nd spin and no resonance from Cu spin is found. The g-value is isotropic with the value of 0.85 above 10K which is not so far from Nd<^<3+> free ion value of 0.73. Below about 5K, however, the g-value decreases rapidly with decreasing temperature with a large angular dependence. Effect of the Nd-Cu interactions on the Nd spin is suggest. [J. Phys. Soc. Jpn. to be published.]
4.ESR study of valence fluctuating compounds. ( before 1987) 1)Electron spin resonance of Eu and Gd ions in SmB_6. [J.Magn.Magn.Mater. 52(1985)271-274.] 2)Higher harmonic electron spin resonance of Eu^<2+> in SmB_6. [J.Phys.Soc. Jpn. 55(1986)43-46.] 3)Electron spin resonance of disordered Sm ions in SmB_6. [J.Phys. Soc. Jpn. 55(1986)3737-3740.]

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] K.Kadowaki,Y.Chiba,K.Kindou and M.Date:"Electron Spin resonance in CuSO_45H_2 down to 100mK." J.Phys.Soc.Jpn.57. 4366-4374 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Kontani,Y.Chiba,K.Sugiyama,Y.Hidaka and M.Date:"Anomalous Electron Spin Resonance in Nd_2CuO_4" J.Phys.Soc.Jpn.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] O.Kondo,M.Ono,N.Kontani,Y.Chiba,K.Sugiyama,A.Yamagishi,M.M.Hikita,Y.Hidaka,M.Date: "High Field Magnetization of Nd_2CuO_4" J.Magn.Magn.Mater.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] K. Kadowaki, Y. Chiba, K. Kindou and M. Date: "Electron Spin resonance in CuSo_45H_2O down to 100mK." J.Phys.Soc.Jpn.57, 4366, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Kontani, Y.Chiba, K.Sugiyama, Y. Hidaka and M. Date: "Anomalous Electron Spin Resonance in Nd_2CuO_4." J.Phys.Soc.Jpn.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] O. Kondo, M. Ono, T. Yosida, N. Kontani, Y. Chiba, K. Sugiyama, A.Yamagisi, M. Hikita, Y.Hidaka and M. Date: "High Field Magnetization of Nd_2CuO_4." J.Magn.Magn.Mater.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] N.Kontani,Y.Chiba,K.Sugiyama,Y.Hidaka,M.Hikita,M.Date.: "Anmalous Electron Spin Resonance in Nd_2CuO_4." J.Phys.Soc.Jpn.

    • Related Report
      1989 Annual Research Report
  • [Publications] O.Kondo.M.Ono,N,Kontani,Y.Chiba,K.Sugiyama,A.Yamagishi,M.M.Hikita,Y,Hidaka,M.Date.: "High field Magnetization of Nd_2CuO_4." J.Magn.Magn.Mater.

    • Related Report
      1989 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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