Simulation of an extended 3D mixed Ising model by Monte Carlo method

• Main Authors: Elidrysy, Anouar, Harir, Said, Zouhair, Abdelilah, Boughaleb, Yahia
• Format: Conference Proceeding
• Language: English
• Subjects: Critical temperature; Ground state phase diagrams; Magnetic properties; Mixed Ising model; Monte Carlo simulation
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2020.04.370

Owing to their useful properties, the ferromagnetic mixed spins Ising have been extensively investigated. In this context, the paper aims to study the phase diagram of 3d mixed spin-1 and spin-3/2 Ising system and its critical properties. The adapted Hamiltonian of the considered mixed spin-(1, 3/2) Ising model is parameterized by three exchange interaction between first nearest neighbors spins Ji (with i = 1, 2 and 3), two crystal field interactions and the external magnetic field. The competition between these parameters can generate rich critical behavior with the coexistence of several phases in the ground state phase diagram. In this work, Monte Carlo simulation based on Metropolis algorithm, was used to study the critical properties in different phases of ground state. The analysis of the behavior of total magnetization and susceptibility as a function of temperature allowed us to study the behavior of the critical temperature of the ferromagnetic – paramagnetic transition TC as a function of different parameters. The obtained results shows that the critical temperature TC has linear Ji dependency in strong spin–spin interaction regime.