Magnetism of γ Fe-Ni Invar Alloys with Low Nickel Concentration

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概要

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• Magnetization, Mossbauer absorption spectra and lattice constants have been measured on the γ phase (f.c.c.) Fe-Ni alloys of 20∼30 at% Ni using finely grained samples in which the γ⇾α martensitic transformation can be suppressed even at liq. He temperature. The magnetic moment decreases very sharply from 1.3μ_B in 20 at% Ni. The Mossbauer absorption spectra observed at liq. He temperature show the appearance of antiferromagnetism in the low nickel concentration range. These experimental facts indicate that in these composition range the alloys consist magnetically of two phases, namely ferromagnetic and antiferromagnetic ones. This magnetic heterogeneity is caused by the statistical concentration fluctuation and is discussed quantitatively by considering a Gaussian type concentration distribution. The temperature and composition variations of the lattice constant and the thermal expansion coefficient can also be interpreted quantitatively on the basis of the same Gaussian type concentration fluctuation.

• 社団法人日本物理学会の論文
• 1969-09-05

著者

• Asano Hajime

  Department Of Chemistry Faculty Of Science Kyoto University

• Asano Hajime

  Department Of Chemistry Faculty Of Science Kyoto University:(present Address) The Research Institute

関連論文

• Crystal Structure of UGe_2
• Lattice Constants of Low Nickel Invar Alloy and Its Anomalous Low Expansion Coeffcient
• Magnetic Heterogeneity in the Invar Alloy Due to Concentration Fluctuation
• Phase Relation and Kinetics of the Transformations in Au-Cu-Zn Ternary Alloys
• Concentration Fluctuations and Anomalous Properties of the Invar Alloy
• Mossbauer Study of γ Fe-Ni Alloys of Low Nickel Concentration
• Magnetism of γ Fe-Ni Invar Alloys with Low Nickel Concentration

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