Abstract
A stochastic model for the dynamics of a macroscopic or classical spin based on a classical generalized Lagrangian formalism is proposed. The model can be used to describe the evolution of the magnetic moment of superparamagnetic particles. In this sense, it is a generalization of the model proposed by Brown, allowing for fluctuations on the magnitudes of the magnetic moments of the particles. The corresponding covariant Fokker-Planck equation is also obtained.
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Ricci, T.F., Scherer, C. A stochastic model for the dynamics of a classical spin. J Stat Phys 67, 1201–1208 (1992). https://doi.org/10.1007/BF01049015
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DOI: https://doi.org/10.1007/BF01049015