Brownian Motion of Spins
Open Access
- 1 January 1970
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics Supplement
- Vol. 46, 210-220
- https://doi.org/10.1143/ptps.46.210
Abstract
Stochastic models of Brownian motion of a spin are discussed. If a frictional resistance is assumed to accompany the random field causing Brownian motion, the stochastic equation of spin motion leads to a Fokker-Planck equation which guarantees approach to thermal equilibrium. With a Landau-Lifshitz type friction assumed, the average magnetic moment is shown to obey the Bloch equation.Keywords
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