  The phenomenon of drift motion of single-domain ferromagnetic particles
induced by the Magnus force in a viscous fluid is studied analytically. We use
a minimal set of equations to describe the translational and rotational motions
of these particles subjected to a harmonic force and a non-uniformly rotating
magnetic field. Assuming that the azimuthal angle of the magnetic field is a
periodic triangular function, we analytically solve the rotational equation of
motion in the steady state and calculate the drift velocity of particles. We
study in detail the dependence of this velocity on the model parameters,
discuss the applicability of the drift phenomenon for separation of particles
in suspensions, and verify numerically the analytical predictions.
