Abstract
The mixed-spin ferrimagnetic Ising system consists of two-dimensional sublattices A and B with spin values S_A=-1 and S_B=5/2 respectively .By used the mean-field approximation MFA of Ising model to find magnetism(m_B, m_A). In order to determined the best stabile magnetism , Gibbs free energy employ a variational method based on the Bogoliubov inequality. The ground-state (Phase diagram) structure of our system can easily be determined at T=0 , we find six phases with different spins values depend on the effect of a single-ion anisotropies D_B, D_A .these lead to determined the second , first orders transition ,and the tricritical points as well as the compensation phenomenon .
Article Type
Article
How to Cite this Article
Ibrahim, Fuad. T.
(2009)
"Mean-field Solution of the mixed spin-1 and spin-5/2Ising system with different single-ion anisotropies,"
Baghdad Science Journal: Vol. 6:
Iss.
4, Article 20.
DOI: https://doi.org/10.21123/bsj.2009.6.4.784-789
