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. Random bonds are considered through a ferromagnetic exchange interaction between nearest-neighbor spins (NN) and an antiferromagnetic exchange interaction between next-nearest-neighbor spins (NNN). The phase diagrams are obtained and the results are applied to Fe-Al disordered alloys.

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