Stochastic resonance in a superparamagnetic particle

The stochastic resonance (SR) effect in a single-domain particle is investigated for the case where the exciting field is imposed not parallel to the anisotropy axis but at an arbitrary angle. We show that despite the fact that for the transverse case there is no SR at all, the intermediate cases yield signal-to-noise ratios much higher than the well-investigated longitudinal case. The frequency range over which the effect is observable is estimated.