1. Phase diagrams and critical behaviours of the mixed spin-5/2 and spin-7/2 Ising system.
- Author
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Karimou, M., Yessoufou, R. A., Ngantso, G. Dimitri, Hontinfinde, F., and Albayrak, E.
- Subjects
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MONTE Carlo method , *FERRIMAGNETIC materials , *CRITICAL temperature , *PHASE diagrams , *MAGNETIC properties , *MAGNETIZATION - Abstract
We used mean-1eld 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 classi1ed according to the extended Néel 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 1eld interactions. Under appropriate conditions, our calculations reveal 1rst-order transitions in addition to second-order ones previously observed in Monte Carlo simulations. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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