  We consider stochastic rotational dynamics of a macrospin at a constant
temperature, in presence of an external magnetic field. Starting from the
appropriate Langevin equation which contains multiplicative noise, we calculate
entropy production (EP) along stochastic trajectories, and obtain fluctuation
theorems. The system remains inherently out of equilibrium due to a spin torque
supporting azimuthal current, leading to an excess EP apart from the EP due to
heat dissipation. The anomaly may be removed using a redefinition of dissipated
heat and stochastic work done. Using numerical simulations, we obtain
distribution functions for entropy production along stochastic trajectories to
find good agreement with the detailed fluctuation theorem.
