Spatial and magnetic ordering of systems chemisorbed at the surface of ferromagnets

The spatial and magnetic ordering of systems chemisorbed at the surface of ferromagnets are studied within mean-field theory. With antiferromagnetic interactions between adatoms (Jaa) and between adatoms and substrate atoms (Jas), and ferromagnetic interactions between substrate atoms (Jss), the spatial and magnetic order parameters are calculated at submonolayer coverages of atoms chemisorbed at the (100) surface of a simple-cubic crystal. Depending on the coverage and the ratio R=JasJaa, a variety of antiferromagnetic and ferrimagnetic solutions are obtained. Results for the temperature-coverage phase diagram and the temperature dependence of the order parameter are presented. © 1984 The American Physical Society.

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