On the Spin Wave Theory of Magnetic Susceptibility and Resonance Absorption in Antiferromagnetics

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概要

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• A theory of resonance absorption in antiferromagnetics based on the spin wave theory deveoloped by Anderson and Kubo is presented. The obtained resonance frequencies are given by two sharp ones, which are compared with the results of the classical theory by Nagamiya. In both cases the anisotropy energy has uniaxial symmetry. The absorption coefficient is also computed. Our calculations of the resonance frequencies are then extended to the antiferromagnetics having the anisotropy energy of ortho-rhombic symmetry. In the course of these calculations we obtained expressions for the magnetic susceptibility, using the obtained energy levels of the spin system which is subjected to a static magnetic field. They are in agreement with those which Kubo has already given by use of the method of statistical thermodynamics.

• 理論物理学刊行会の論文

著者

• Nakamura Tuto

  Physics Department Faculty Of Science Kyusyu University

• Nakamura Tuto

  Physics Department Kyusyu University

• Nakamura Tuto

  Physics Department, Kyusyu University

関連論文

• Statistical Mechanics of Cooperative Phenomena
• Statistical Theory of Hindered Rotation in Molecular Crystals
• On the Spin Wave Theory of Magnetic Susceptibility and Resonance Absorption in Antiferromagnetics

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