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The formula for dipole radiation reaction torque acting on a system ofcharges, and the Larmor-like formula for the angular momentum loss by thissystem, differ in the time derivative term which is the analogue of the Schottterm in the energy loss problem. In the well-known textbooks this discrepancyis commonly avoided via neglect of the Schott term, and the Larmor-like formulais preferred. In the present paper both formulae are used to derive twodifferent equations of motion of a polarized spinning-top. Both equations areintegrable for the symmetric top and lead to quite different solutions. Thatone following from the Larmor-like formula is physically unplausible, incontrast to another one. This result is accorded with the reinterpretation ofLarmor's formula discussed recently in the pedagogical literature. It isappeared, besides, that the Schott term is of not only academic significance,but it may determine the behavior of polarized micro- and nanoparticles innature or future experiments.

On the free rotation of a polarized spinning-top as a test of the correct radiation reaction torque