Monte-Carlo calculation of the magnetocaloric effect in Ni-Mn-Ga alloys

摘要

The three-dimensional model for the theoretical description of the 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. It is shown that the isothermal magnetic entropy change upon magnetic field variations from 0 to 5 T and other magnetic properties are in good agreement with the available experimental data.