THE INFLUENCE OF THE EXCHANGE INTERACTION ON ATOMIC ORDERING IN ALLOYS WITH FCC LATTICE

The investigation of ordering in binary substitution alloys with f.c.c. lattice, in which magnetic ordering can exist along with the f.c.c. structure is performed in second approximation of the Kirkwood method. It is shown that the exchange interaction essentially effects the development of atomic ordering. The possible types of phase diagrams are investigated. It is shown that the correlation considered makes a correct description possible of the kind of order-disorder phase transition in the alloys of L1 superstructure. The correlation contributions to the heat capacity of alloys are calculated.