Magnetic Resonance of Localized Spins : Phenomenological Equation of Motion

概要

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Phenomenological equations of motion for the macroscopic magnetization of an interacting itinerant-spin-localized-spin system are considered. The proposed equations contain relaxation terms which are related to the instantaneous external and exchange fields. S resonance condition is obtained, and it aagrees with that of quantum mechanical (RPA) calculations. The requirement of positive energy absorption is correctly satisfied and the exchange part of the relaxation terms has no effect on the resonance line shape. Brief considerarions on the origin of the spin-diffusion term are also presented.
理論物理学刊行会の論文
1974-08-25