Long- and Short-Range Magnetic Order in Titanomagnetite

—It is shown that the method of random exchange-interaction fields is suitable for identifying the temperature interval where the short-range magnetic order is still present while the long-range order is already absent. On this interval, the state of the magnetic system is a set of ferromagnetic clusters whose magnetic moment can vary with time and ensure magnetic viscosity. In the paper, the Curie point and paramagnetic Curie point are determined for a two-sublattice ferrimagnetic with the distribution of iron ions corresponding to titanomagnetite.