Effects of electric field on magnetic properties of Mn_xGe_1-x diluted magnetic semiconductors

We report the effect of external electric field (eef) on the magnetic properties of mnxge_1-x, diluted magnetic semiconductor. we present a kondo lattice model type hamiltonian with exchange coupling between localized spins, itinerant holes and the eef. the magnetization, the dispersion and critical temperature (t_c) are calculated for different values of eef parameters (a) using double time temperature-dependent green function formalism. the enhancement of the (t_c) with the eef is shown to be very distinct and is in agreement with recent experimental observation and much required for spintronics applications and devices.