title: Magnetic behavior of a mixed Ising 3/2 and 5/2 spin model.
abstract: We perform Monte Carlo simulations in order to study the magnetic properties of the mixed spin-S = ± 3/2, ± 1/2 and spin-σ = ± 5/2, ± 3/2, ± 1/2 Ising model. The spins are alternated on a square lattice such that S and σ are nearest neighbors. We found that when the Hamiltonian includes antiferromagnetic interactions between the S and σ spins, ferromagnetic interactions between the spins S, and a crystal field, the system presents compensation temperatures in a certain range of the parameters. The compensation temperatures are temperatures below the critical point where the total magnetization is zero, and they have important technological applications. We calculate the finite-temperature phase diagrams of the system. We found that the existence of compensation temperatures depends on the strength of the ferromagnetic interaction between the S spins.
authors.affiliation: Department of Physics, Universidad Simón Bolívar, Caracas 1080, Venezuela.
authors.forename: N
authors.initials: N
authors.lastname: De la Espriella
authors.forename: G M
authors.initials: GM
authors.lastname: Buendía
mesh_terms: D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D045305:Cytochromes c' / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D008280:Magnetics; D015233:Models, Statistical; D009010:Monte Carlo Method; D011166:Porphyrins / Q000737:chemistry; D011789:Quantum Theory; D013696:Temperature
chemical_list: D045305:Cytochromes c'; D011166:Porphyrins; D007501:Iron