This article deals with a way to solve the spatially homogeneous Landau
equation using probabilistic tools. Thanks to the study of a nonlinear
stochastic differential equation driven by a space-time white noise, we
state the existence of a measure solution of the Landau equation with
probability measure initial data, for a generalization of the Maxwellian
molecules case. Then, by approximation of the Landau coefficients, the first
result helps us to state the existence of a measure solution for some soft
potentials [$\gamma \in ( -1,0) $]. This second part is based on
the use of nonlinear stochastic differential equations and some martingale
problems.