Magnetic Behavior of Ferri-ferromagnetic Alloy in Presence of External Magnetic Field

The magnetic behavior of the mixed ferro-ferrimagnetic alloy with (Aa Bb Cc)y D structure composed of Ising spins SA = 1, SB = 5/2, SC = 2, and SD = 3/2 in the presence of the external magnetic field is investigated by the use of the effective field theory. The role of concentration b is discussed in this system in detail. Results show that for a = 0.4, only when the concentration b is in the region 0.60 ≥ b > 0.34 can the ferrimagnetic behavior be seen. Otherwise, the alloy shows ferromagnetic behavior.