Phase diagram of spin-1/2 Ising semi-infinite and film ferromagnets with 
spin-3/2 overlayers

Bentaleb, M.; El Aouad, N.; Saber, M.

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Phase diagram of spin-1/2 Ising semi-infinite and film ferromagnets with spin-3/2 overlayers

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Saber, M.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Bentaleb, M., El Aouad, N., & Saber, M. (2002). Phase diagram of spin-1/2 Ising semi-infinite and film ferromagnets with spin-3/2 overlayers. Physica Status Solidi B-Basic Research, 231(2), 529-540. Retrieved from http://www3.interscience.wiley.com/cgi-bin/issuetoc?ID=93521377.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-379A-8

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.