Effect of Pressure on Magnetic Properties of Lu(Co1-xGax)2 Itinerant-Electron Ferromagnetic Compounds.

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  • Saito H.
    Department of Materials Science, Graduate School of Engineering, Tohoku University
  • Yokoyama T.
    Department of Materials Science, Graduate School of Engineering, Tohoku University
  • Fukamichi K.
    Department of Materials Science, Graduate School of Engineering, Tohoku University
  • Kamishima K.
    Institute for Solid State Physics, The University of Tokyo
  • Mitamura H.
    Institute for Solid State Physics, The University of Tokyo
  • Goto T.
    Institute for Solid State Physics, The University of Tokyo

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  • Effect of Pressure on Magnetic Properti

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Abstract

Effects of pressure on the Curie temperature and the magnetization of itinerant-electron ferromagnetic compounds Lu (Co1-xGax) 2 have been investigated in the concentration range from x = 0. 10 to 0. 20. All of the compounds show large negative values of ∂Tc/∂P and ∂Ms/∂P. An anomalously large negative ∂Tc/∂P was observed around x = 0. 10, being the critical concentration of the onset of ferromagnetism. This phenomenon can be explained qualitatively by taking spin fluctuations into account. The spontaneous magnetization begins to decrease drastically above a certain pressure, suggesting the onset of the metamagnetic transition from the ferromagnetic to paramagnrtic state.

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