The Ground-State Phase Diagrams of Spin-3/2 Ising Model on a Fm/Afm Two-Layer Lattice With Crystal Field

Abstract

The ground-state (GS) phase diagrams of spin-3/2 Ising model for ferromagnetic/antiferromagnetic (FM/AFM) interactions on a two-layer lattice are studied under a constant magnetic field by varying the crystal field values for general coordination number q in detail. Thus, it is found that the system exhibits twenty-nine topologically different GS configurations according to their GS phase diagrams obtained in the (J2/J1, J3/qJ1) planes. As the crystal field becomes more and more negative, the remaining phase configurations in the phase diagrams include only spin ±1/2 values as expected.

The temperature-dependent phase diagrams of the spin-3/2 Ising model on a FM/AFM two-layer lattice with a crystal field

“…Since the GS phase diagrams are obtained at zero absolute temperature, they are very helpful in obtaining the stable solutions in the temperature-dependent models. These GS phase diagrams were presented in our previous paper [33]. So this study of GS's will be our guide for this work concerning the obtaining of the temperature-dependent phase diagrams.…”

“…with the ground-state phase diagrams obtained and classified as in Ref. [33], the GS phase diagrams are used as a guide in obtaining the temperature-dependent phase diagrams. It is observed that the system presents both second-and first-order phase transitions for all q.…”