The antiferromagnetic exchange interaction anisotropy and magnetic properties of a diluted Ising-<f><NU>7</NU>/2</f> model

Within an effective field theory we investigate the anisotropy of an antiferromagnetic coupling and the Ne´el temperature in a diluted spin-<f><NU>7</NU>/2</f> Ising model. The bond dilution (<f>p</f>) effect in the Ne´el temperature is shown in (<f>TN,p)</f> plane for some selected values of anisotropic parameter <f>αc=Jc/J</f>. The temperature dependence of the magnetic moment has been studied for some values of <f>p</f> and <f>αc.</f> [Copyright &y& Elsevier]