Quenched random-bond Ising ferromagnet: Anisotropic concentrations

We have recently introduced an effective-field framework which, without mathematical complexities, enables calculation of the phase diagram (and magnetization) associated with a quenched mixed-bond spin-1/2 Ising model in an anisotropic simple cubic lattice. The case corresponding to anisotropic coupling constants, but isotropic concentrations, was discussed in detail in that occasion. Herein we discuss the case corresponding to isotropic coupling constants but anisotropic concentrations. Certain interesting phase diagrams are exhibited; whenever comparison with other available data is possible, the present results provide a satisfactory qualitative (and to a certain extent quantitative) agreement.