Investigation of the V₁₅ magnetic molecular nanoclusters

¹ Amirkhanov Institute of Physics, Daghestan Scientific Center of RAS - 94, Yaragskogo st., 367003 Makhachkala, Russia
² Daghestan State University - 46a, M.Gadjieva st., 367000 Makhachkala, Russia

^(a) Present address: Amirkhanov Institute of Physics, Daghestan Scientific Center of RAS - 94, Yaragskogo st., 367003 Makhachkala, Russia; kamal71@mail.ru

Received: 5 July 2012
Accepted: 2 November 2012

Abstract

In this work the exchange interactions in V₁₅ magnetic molecular nanoclusters are examined. The magnetization reversal process is investigated at various values of the 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 V₁₅ magnetic molecular nanocluster: J = 500 K, J′ = 150 K, J″ = 225 K, J₁ = 50 K, J₂ = 50 K. For the first time, the heat capacity shows two maxima located in close proximity of each of the three transitions from the low-spin state into the high-spin behavior.