Monte Carlo calculations of the phase transformations and the magnetocaloric properties in Heusler Ni–Mn–Ga alloys

Abstract

The three-dimensional model for the theoretical description of phase transformations and the magnetocaloric effect in shape–memory Heusler Ni 2+ x Mn 1− x Ga alloys ( x=0.18–0.27) with a coupled magnetostructural phase transition by the classical Monte Carlo method is proposed. The isothermal magnetic entropy change upon magnetic field variations from 0 to 5 T, and other magnetic properties are in good qualitative agreement with the available experimental data.