Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system
Statistical Mechanics
2019-10-03 v1
Abstract
We used mean-field theory based on the Bogoliubov inequality for the Gibbs free energy to examine the magnetic properties of a mixed spin-5/2 and spin-7/2 Blume-Capel ferrimagnetic system. The thermal behaviours of the system magnetization are classified according to the extended N\'eel nomenclature. The system exhibits compensation phenomena where a complete cancellation of sublattice magnetizations is observed below the critical temperature. Temperature-dependent phase diagrams are constructed for the case of unequal sublattice crystal field interactions. Under appropriate conditions, our calculations reveal first-order transitions in addition to second-order ones previously observed in Monte Carlo simulations.
Keywords
Cite
@article{arxiv.1910.00908,
title = {Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system},
author = {M. Karimou and R. A. Yessoufou and G. Dimitri Ngantso and F. Hontinfinde and E. Albayrak},
journal= {arXiv preprint arXiv:1910.00908},
year = {2019}
}
Comments
10 pages, 7 figures