The Effect of a Random Crystal-Field on the Mixed Ising Spins (1/2, 3/2) |
| L. Bahmad, M.R. Benayad, A. Benyoussef and A. El Kenz
Faculté des Sciences, Département de Physique, Laboratoire de Magnétisme et Physique, des Hautes Energies, B.P. 1014, Rabat, Morocco |
| Received: October 22, 2010; in final form: January 4, 2011 |
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| We study the magnetic properties of a mixed Ising ferrimagnetic system, in which the two interacting sublattices have spins σ, (± 1/2) and spins S, (± 3/2, ± 1/2) in the presence of a random crystal field, with the mean field approach. The results obtained, using mean field approach and Monte Carlo simulation, show the appearance of a new ferrimagnetic phase, namely the partly ferrimagnetic phase (mσ = -1/2, mS = + 1). Consequently, three topologically different types of phase diagrams have been given by mean field approach. The effect of increasing the exchange interaction parameter J, at very low temperature is also investigated. |
| DOI: 10.12693/APhysPolA.119.740 PACS numbers: 05.50.+q, 75.10.Hk, 75.50.Gg |