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

摘要

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 5T, and other magnetic properties are in good qualitative agreement with the available experimental data.