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Mean field study of the mixed Ising model in a random crystal field

Author

Listed:
  • Bahmad, L.
  • Benyoussef, A.
  • El Kenz, A.

Abstract

The magnetic properties of a mixed Ising ferrimagnetic system, in which the two interacting sublattices have spins σ, (±1/2) and spins S, (±1,0) in the presence of a random crystal field, have been studied 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, partly ferrimagnetic phase (mσ=12,mS=−12) and consequently the existence of four topologically different types of phase diagrams. Furthermore, compensation behaviour and re-entrant phenomenon are found for appropriate ranges of crystal field. Thermal magnetization behaviour and phase diagrams have been discussed in detail.

Suggested Citation

  • Bahmad, L. & Benyoussef, A. & El Kenz, A., 2008. "Mean field study of the mixed Ising model in a random crystal field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 387(4), pages 825-833.
    • Handle: RePEc:eee:phsmap:v:387:y:2008:i:4:p:825-833
    DOI: 10.1016/j.physa.2007.10.009
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