Title: NEW TYPE PHASE TRANSITIONS IN THE MITSUI MODEL WITH BIMODAL RANDOM FIELD
Author(s): I.V.Stasyuk, O.V.Velychko (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine)

Thermodynamic functions of the Mitsui model with bimodal random field are calculated in the mean field approximation for long-range interactions with an exact treatment of the intracell interaction of pseudospins. Conditions of the appearing of the first order phase transition between nonequivalent nonpolar phases or the possibility of phase separation are investigated.

Comments: Figs. 6, Refs. 11, Tabs. 0.