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

L. Bahmad, A. Benyoussef and A. El Kenz

Physica A: Statistical Mechanics and its Applications, 2008, vol. 387, issue 4, 825-833

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.

Keywords: Mixed Ising; Ferrimagnetism; Compensation temperature; Re-entrance; Crystal field (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:387:y:2008:i:4:p:825-833

DOI: 10.1016/j.physa.2007.10.009

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