Abstract
On the basis of classical Monte Carlo simulations, we investigate the temperature and magnetic field dependencies of magnetization, strain order parameter, specific heat and entropy of Ni-Mn-In Heusler alloy, in which the part of the Mn atoms interact antiferromagnetically. It is shown that this antiferromagnetic exchange is responsible for existence of several magnetic phase transitions in the Heusler alloys. It is shown that with the help of the model Hamiltonian we obtain coupled magnetostructural phase transition. Results of simulations are in good qualitatively agreement with the experimental data.
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