Abstract
Within the framework of the effective field theory, we examine the phase diagrams of a spin-1/2 Ising film, with a spin-3/2 atoms on the top and bottom surfaces, and the corresponding semi-infinite system. In particular, the effects of surface single-ion anisotropy on the phase diagram and critical value for surface ordering are clarified. The system shows the existence of a critical value of the ratio of the surface interaction to the bulk one above which the surface magnetism appears. This critical value moves to lower values when D s increases. The critical surface temperature exhibits a characteristic behavior namely when large negative D s are selected.
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