Electronic phase separation in magnetic oxides with Jahn–Teller ions

Abstract A model of the Kondo–lattice type is used to describe a competition between the localization and metallicity in doped manganites and related magnetic oxides with Jahn–Teller ions. It is shown that the number of itinerant charge carriers can be significantly lower than that implied by the doping level x. A strong tendency to the phase separation is demonstrated for a wide range of x values. The phase diagram of the model in the x – T plane is constructed.