PHASE-DIAGRAMS OF THE DILUTED MIXED-SPIN ISING-MODEL ON A HONEYCOMB LATTICE

The magnetic properties of diluted mixed-spin-1/2 and spin-1 Ising mag netic systems with crystal-held interactions on a honeycomb lattice (z = 3) are investigated by using the effective-field theory with correl ations. The phase diagrams are given for both ferromagnet and ferrimag net. The influence of crystal-field interaction, D, and the concentrat ions of magnetic atoms, P-x(alpha = A or B represent the two sublattic e), on the properties of such a system is discussed. The results show that the reentrant phenomena and two-compensation point exist, Especia lly, the independent modulation of P-A and P-B may result in some inte resting phenomena, such as three thresholds exist when P-A = 1.0 and s even thresholds exist when P-B = 1.0.