DILUTE SPIN 3 2 ISING-MODEL - A PROBABILITY-DISTRIBUTION TECHNIQUE INEFFECTIVE-FIELD THEORY/

The quenched diluted spin 3/2 Ising model on a square and simple cubic lattice is studied within the framework of an effective field theory based on the use of exact Ising spin identities. A new technique that makes use of a probability distribution that correctly accounts for th e single-site kinematic relations and certain configurational averagin g identities is employed. The temperature dependence of the magnetizat ion and other ordering parameters is presented for selected values of the site dilution. Results for the concentration dependence of the tra nsition temperature are obtained and the critical concentration for or dering established.