International conference ''Phase transitions, critical and nonlinear phenomena in condensed matter'', Makhachkala, September 6-9, 2017 Dynamics of Cell
Phase transitions in the antiferromagnetic Heisenberg model on a body-centered cubic lattice with allowance for the next-nearest-neighbor interactions
Abstract:
Based on the replica exchange Monte Carlo algorithm and histogram analysis of data, the phase transitions in the three-dimensional antiferromagnetic Heisenberg model on a body-centered cubic lattice with allowance for the next-nearest-neighbor interaction are studied. The study is performed for the next nearest-neighbor exchange interaction ratio of $r$ = 1. It is established that, for this model, the transition from the antiferromagnetic to paramagnetic phase is a first-order phase transition.