Classical spin as a nonlinear damped oscillator

In this paper, the aim of our article is to describe an exact transformation of the nonlinear damped Landau-Lifshitz-Gilbert (LLG) equation written in the most general form to a system of nonlinear damped oscillators. We demonstrate that the micromagnetic and oscillatory approaches are completely equivalent. We also show how the transformed LLG equation can be applied to find the energy barrier for thermally induced magnetization reversal in two cases: an anisotropic magnetic particle in an arbitrary magnetic field and two classical anisotropic exchange-coupled spins.