Dynamical Behavior of Antiferromagnetic Sublattice Magnetization Vectors. I

概要

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The dynamical behavior of the sublattice magnetization vectors of an antiferromagnet in a static magnetic field near the spin-flip critical field is studied theoretically. The well-known phenomenological equation of motion, including the Landau-Lifschitz damping term, is solved approximately by an analytical method in the case of an antiferromagnet having orthorhombic anisotropy energy. It is shown that when the applied field is close to the spin-flip critical field, the antiferromagnetic magnetization axis moves slowly towards its equilibrium position and that the motion is governed by an equation of a classical pendulum with viscous damping. It is also shown that a small eigenoscillation is superposed on this large slow motion.
社団法人日本物理学会の論文
1969-08-05