A reentrant magnetic phase transition in molecular based magnet AFeIIFeIII(C2O4)3[A=N(n-CnH2n+1)4, n=3-5] is investigated by the use of Mean-Field Theory (MFT) for a mixed spin-2 and spin-5/2 Ising system on a simple cubic lattice. It is found that a double-entrant ferrimagnetic behaviour in the mixed-spin system depends on the negative values of the anisotropies in the order-disorder system for the two sublattices of the mixture. It is shown using numerical calculations that this phenomenon is strongly affected by the magnetic anisotropy and lattice disorder.
International Letters of Chemistry, Physics and Astronomy (Volume 56)
H. K. Mohamad "Reentrance Phenomenon of a Mixed Spin Ising Model", International Letters of Chemistry, Physics and Astronomy, Vol. 56, pp. 31-36, 2015