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1993 Fiscal Year Final Research Report Summary

De Haas-van Alphen Effect in Rare-earth Gallium Compounds RGa2

Research Project

Project/Area Number 04640332
Research Category

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

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionNagoya Institute of Technology

Principal Investigator

SAKAMOTO Isao  Nagoya Institute of technology, Faculty of Engineering, Associate professor, 工学部, 助教授 (80094267)

Project Period (FY) 1992 – 1993
KeywordsDe Haas-van Alphen effect / Fermi surface / Metamagnetic phase transition / Antiferromagnet / s-f mixing effect / LaGa2 / PrGa2 / SmGa2
Research Abstract

The measuring system of de Haas-van Alphen effect using the 10 superconducting magnet purchased with this grant-in aid was constructed. We have measured the dHvA effect of antiferromagnetic SmGa2 and PrGa2, and their reference substance LaGa2 in the 4He temperature range with use of this measuring system in the field ranging from 5T to 10 T.We have obtained the following results from the measurement. (1) The Fermi surfaces of antiferromagnetic SmGa2 and PrGa2 are very similar to that of LaGa2 in spite of differences in 4-f states in these compounds. (2) Metamagnetic phase transition observed in PrGa2 and SmGa2 results in the field induced exchange interaction between electron spin and 4-f orbital spin. (3) The nesting effect of the Fermi surface stabilizse the modulated magnetic structure observed in PrGa2. (4) The Fermi surfaces for antiferromagnetic state differ from that of paramganetic state in SmGa2. (5) The electron mass enhancement due to s-f mixing effect is suggested to occur in SmGa2.
We will continue to invesigate the dHvA effect on compounds of heavy rear-earth atoms and Ga.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] I.Sakamoto: "De Haas-van Alphen effect in LaGa2" J.Phys.Soc.Jpn.(to be published). (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Sakamoto: "De Haas-van Alphen effect and magnetic properties of antiferro-magnetic SmGa2 and PrGa2" Physica(to be published). (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Sakamoto: "Fermi surface and magnetic properties of antiferromagnetic SmGa2" J.Mag.Mag.Mater.108. 125-126 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Sakamoto: "De Haas-van Alphen effect in LaGa2 and SmGa2" Physica B. 165. 339-340 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Sakamoto: "Preparation and microstructure of reactively sputtered(Ti-Zr)Films" Thin Solid Films. 228. 169-172 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Henmi: "Transport properties of RGa2(R=La,Ce,Sm)" Physica B. 186. 655-657 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] I.Sakamoto: "The de Hass-van Alphen effect in LaGa2" J.Phys. Soc. Jpn.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] I.Sakamoto: "De Hass-van Alphen effect and magnetic properties of antiferromagnetic SmGa2 and PrGa2" Physica B. 194-196. 1175 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] I.Sakamoto: "Fermi surface and magnetic properties of antiferromagnetic SmGa2" J.Mag. Mag. Master. 108. 125 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] I.Sakamoto: "De Haas-van Alphen effect in LaGa2 and SmGa2" J.Mag. Mag. Master. 165. 339 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] I.Sakamoto: "Preapration and microstructure of reactively sputtered (Ti-Zr9 films" Thin Solid Films. 228. 169 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Henmi: "Transport properties of RGa2 (R=La, Ce, Sm)" Physica B. 186. 655 (1993)

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

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Published: 1995-03-27  

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