Magnetic properties and spin structure on Ising spin system with two-spin and four-spin interactions

The magnetization, the specific heat, the Curie temperature and spin structures of the Ising spin system with two-spin and three-site and four-site four-spin interactions have been investigated by making use of the Monte Carlo simulation. The conditions of the change in the ground state (GS) spin structure are determined for Ising spin system with both two-spin and four-spin interactions. The GS spin arrangements of each phase are also obtained for Ising spin systems on two-dimensional square lattice with both two-spin and four-spin interactions, and only with four-spin interaction.