Computational investigation of stable formation condition for Fe_xNi_1−x alloy films on paramagnetic substrate

The adsorption process of ultrathin ferromagnetic Fe and Ni alloy film on a nonmagnetic metal substrate is studied by the variational spin-density functional method. The conditions for the stable formation of ferromagnetic films with respect to island adsorption are discovered with a change of values of the coverage parameter and alloy component concentration. The equilibrium values of vacuum gap and film thickness are determined from the minimum of the total interfacial energy. The energy characteristics of films Fe_xNi_1-x on close-packed surfaces W, Cu and Ag with effects of magnetic ordering are calculated for different temperatures. (paper)