Mixed spin-12 and spin-32 Ising system in a longitudinal magnetic field

The magnetic properties of a mixed Ising ferro and ferrimagnetic system on a Bethe lattice, in which the two interpenetrating sublattices have spins that can take two values, σ=±12, alternated with spins that can take four values, S=±32, ±12, are studied. On the Bethe lattice, we obtain closed expressions for sublattice and total magnetizations. The thermal behaviors of magnetizations are examined in detail. We find some interesting phenomena in these quantities, due to applied longitudinal magnetic field.