Monte Carlo study of the effect of charge ordering on the electrical and magnetic properties of half-doped manganites.

• Monte Carlo study for the charge ordering in half-doped manganites. • The dependence of the electrical and magnetoresistance and magnetization on the charge ordering. • The behavior of the manganites because of the charge ordering phase is semiconductor like. • These behaviors nominate the half-doped manganites to be used in diode junction applications. The Monte Carlo Antiferromagnetic Ising model was used to study the electrical properties and magnetoresistance of manganese oxides due to the charge ordering phase occurring at half doping, x = 0.5. The half-doped manganites have an insulator antiferromagnetic ground state. The internal energy, specific heat, resistivity, the magneto-resistance and magnetization have been investigated with different applied magnetic fields. Our simulation reveals that the resistivity decreases exponentially as the free charge increase to transport from the insulator to conductor phase. The magnetoresistance has positive high values with magnetic field. The obtained insulator–metal transition behavior candidates the half-doped manganites to be very good semiconductors diode junctions. [ABSTRACT FROM AUTHOR]