A Theory of the Uniaxial Ferromagnetic Anisotropy Induced by Magnetic Annealing in Cubic Solid Solutions

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概要

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• According to Van Vleck, the cubic ferromagnetic anisotropy may originate from the interplay between the orbital valence and spin-orbit interaction, which results an apparent existence of the dipole-dipole coupling between spins. In a solid solution, the dipole-dipole coupling energy depends not only on the kind of an atom pair but also on the direction of spontaneous magnetization relative to the axis of the atom pair, and consequently it may yield an anisotropic equilibrium distribution of solute atom pairs at temperatures below the Curie temperature, which, in turn, may induce an additional ferromagnetic anisotropy having symmetry lower than cubic. Basing on this idea and using the same model as in Van Vleck's theory of cubic ferromagnetic anisotropy, we have calculated the uniaxial ferromagnetic anisotropy induced by magnetic annealing and obtained results, which agree well with available experimental data, especially as to its magnitude as dependent on the concentration of solute atoms and on the direction of magnetic field applied during annealing and its temperature dependence. Brief decussions in terms of the same idea are also given of the ferromagnetic behaviors of various alloys.

• 東北大学の論文

著者

• Taniguchi Satoshi

  The Research Institute For Iron Steel And Other Metals

関連論文

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