Abstract
A quenched disordered Ising model with a distribution function that includes dilution and random bonds is studied through the mean-field renormalization-group approach. The phase diagram is obtained, and the results are applied to Fe-Mn-Al alloys. Fittings of the experimental phase diagram and the reduced mean hyperfine field at room temperature are shown to be better than those previously obtained through a single-site diluted model.
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