  We propose an explanation for the experimentally observed temperature
hysteresis of magnetization in single crystals of lanthanum manganite
(La0.8Sr0.2MnO3). The phenomenon is interpreted within the framework of a
double-exchange model with allowance for the interaction of the magnetic
subsystem with a bistable mode of the tilting-rotational oscillations in the
correlated sublattice of MnO6 octahedra.
