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1988 Fiscal Year Final Research Report Summary

Study of paramagnetic phase of metallic magnet by means of microscopic methods

Research Project

Project/Area Number 62540228
Research Category

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

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

Principal Investigator

MOTOYA Kiyoichiro  Faculty of Science, Saitama University Associate Professor, 理学部, 助教授 (60114683)

Project Period (FY) 1987 – 1988
KeywordsMagnetism / Metals / Neutron Scattering / Nuclear Magnetic Resonance / 核磁気共鳴 / 電子相関
Research Abstract

Elastic and inelastic neutron scattering measurements have been made on a series of pseudobinary intermetallic compounds Y(Mn_<1-x>Al_x)_2. Long range antiferronagnetic order below T_N - 100K in YMn_2 has been shown to collapse by substitution of only 5% of the manganese atoms by aluminum atoms. In these compounds, a spin glass transition has been clearly indicated by a change in the energy width of the scattered neutron spectrum, as well as by the onset of field hysteresis in susceptibility measurements. In the compound with x = 0.10, the amplitude of spin fluctuations S does not change appreciably with temperature, whereas in YMn_2 it drops by more than 30% at T_N and then increases gradually with increasing temperature. A considerable degree of spatial correlations of spin fluctuations persists up to at least 760K, which is similar to the behavior observed in YMn_2 but quite different from the characteristics of simple localized electron magnets.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] K.Motoya,;T.Freltoft,;P.Boni,;G.Shirane.: Physical Review B.38. 4796-4802 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Motoya,et al.: Physical Review B.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Motaya; T. Freltoft; P. Boni; G. Shirane: "Neutron scattering study of spin fluctuations in Y(Mn_<1-x>Al_x)_2" Physical Review B. 38. 4796-4802 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Motoya et al.: "Spin dynamics of spin-glass transition in Y(Mn_<0.9>Al<20.1@>D2)_2" Physical Review B.

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

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Published: 1990-03-20  

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