Study of the mixed Ising spins (1/2,3/2) in a random crystal field

Details Study of the mixed Ising spins (1/2,3/2) in a random crystal field Study of the mixed Ising spins (1/2,3/2) in a random crystal field

2008-10-22

arxiv.org/abs/0810.4128v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1016/j.physa.2007.10.009

We study the magnetic properties of a mixed Ising ferrimagnetic system, in which the two interacting sublattices have spins $\sigma$, $(\pm 1/2)$ and spins $S$, $(\pm 3/2,\pm 1/2)$ in the presence of a random crystal field, with the mean field approach. The obtained results show the existence of some interesting phenomena, such as the appearance of a new ferrimagnetic phase namely the partly ferrimagnetic phase $(m_{\sigma}=\frac{-1}{2},m_S=+1)$ and consequently the existence of three topologically different types of phase diagrams. The effect of increasing the exchange interaction parameter $J$, at very low temperature is investigated. The transitions shown in these phase diagrams are in good agreement with those obtained in the ground state case.

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