Phonons and Martensitic Transformation in Mn-rich γ-MnCn Alloys

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概要

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• The phonon dispersion relations ip Mn-rich y-MnCu alloys have been studied by means of neutron inelastic scattering. At the martensitic transfor,mation, the [100] Iongitudinal phonon branch shows softening near the r point. In addition, the elastic constant C1 2 is negative in a certain temperature range near the transi-tion and the structural phase transition is caused by the vanishing of C1 1 + 2C1 2 -This mechanism of the martensitic transformation can successfully explain the peculiar properties of the y-MnCu alloy system and the difference between this alloy and the y-MnNi system. The tetragonal lattice deformation in the y-MnCu alloy may be considered to bc induced by the magnetic coupling force which accompanies the long-range magnetic order.

• 社団法人日本物理学会の論文
• 1981-10-15

著者

• Tsunoda Yorihiko

  Faculty Of Science Osaka University

• Wakabayashi Nobuyoshi

  Solid State Division Oak Ridge National Laboratory

• Tsunoda Yorihiko

  Faculty of Science, Osaka University

関連論文

• Neutron Scattering Measurements in Chromium near the Neel Temperature
• Elastic Moduli of γ-MnCu Alloys
• On the Possibility of a Transitional State of fcc-bcc Martensitic Transformation in Fe
• Anisotropic Thermoremanent Magnetization in the γ-MnCu Alloy
• Temperature Variation of Magnetic Moments in α-Mn(Sn)
• Phonons and Martensitic Transformation in Mn-rich γ-MnCn Alloys
• Influence of Particle Size on SDW : γ-FeCo Precipitates in Cu

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