Computational investigations of the magnetic properties of the V _(15) magnetic molecular nanocluster model in strong magnetic fields by the Monte Carlo method

摘要

In the work, the exchange interactions in V_(15) magnetic molecular nanoclusters are examined. The magnetization reversal process is investigated at various values of exchange constant set by means of the Monte-Carlo method. It is shown, that the most exact agreement with experimental results of the field dependence of susceptibility is observed in the following set of exchange interaction constants in the V_(15) magnetic molecular nanocluster: J = 500 K, J′ = 150 K, J″ = 225 K, J_1 = 50 K, J_2 = 50 K. For the first time, the heat capacity reveals by two maxima located in close proximity at each three transitions from low-spin state into the high-spin behavior.