Title: Reentrant transitions of a mixed-spin Ising model on the diced lattice
Author(s):

	M.Jascur (Department of Theoretical Physics and Astrophysics, Faculty of Science, P.J. Safárik University, Park Angelinum 9, 040 01 Kosice, Slovak Republic) ,
	J.Strecka (Department of Theoretical Physics and Astrophysics, Faculty of Science, P.J. Safárik University, Park Angelinum 9, 040 01 Kosice, Slovak Republic) ,

Magnetic behaviour of a mixed spin-1/2 and spin-1 Ising model on the diced lattice is studied using an exact star-triangle mapping transformation. It is found that the uniaxial as well as biaxial single-ion anisotropy acting on the spin-1 sites may potentially cause a reentrant transition with two consecutive critical points. Contrary to this, the effect of next-nearest-neighbour interaction between the spin-1/2 sites possibly leads to a reentrant transition with three critical temperatures in addition to the one with two critical points only. The shape of the total magnetization versus temperature dependence is particularly investigated for the case of ferrimagnetically ordered system.

Key words: reentrant transition, Ising model, exact solution, star-triangle transformation, uniaxial and biaxial single-ion anisotropy
PACS: 75.10.Hk, 05.50.+q, 75.40