Ising model on a body-centered cubic lattice with competing exchange interactions in strong magnetic fields
K. S. Murtazaev1, A. K. Murtazaev2, M. K. Ramazanov1,2, M. A. Magomedov1,2, and A. A. Murtazaeva1
1Institute of Physics, Dagestan Federal Research Center, Russian Academy of Sciences Makhachkala 367003, Russia
2Dagestan Federal Research Center, Russian Academy of Sciences Makhachkala 367000, Russia
Received February 24, 2021, published online April 26, 2021
The effect of an external magnetic field on phase transitions, magnetic and thermodynamic properties of the antiferromagnetic Ising model on a body-centered cubic lattice with competing exchange interactions was studied using the replica algorithm of the Monte Carlo method. It is shown that a second-order phase transition is observed in the range of magnetic field values 7.0 ≤ H ≤ 10.0, and a first-order phase transition is observed in the range 11.0 ≤ H ≤ 13.0. A further increase in the magnetic field strength leads to the suppression of the phase transition.
Key words: phase transition, Ising model, magnetic field, Monte Carlo method.