Multicritical points in the ferromagnetic binary Ising model

J.A. Plascak

Physica A: Statistical Mechanics and its Applications, 1993, vol. 198, issue 3, 655-665

Abstract: The phase diagram and the temperature dependence of the magnetization of the random-site binary ferromagnetic Ising model consisting of spin-12 and spin-1 components in the presence of crystal-field interactions is investigated by the use of a mean field theory. By considering in this simple system all the exchange interactions positive, seven topologically different types of phase diagrams are achieved, including a variety of multicritical points such as tricritical, fourth-order, critical end, and isolated critical. An ordered phase persisting for large values of the crystal-field interaction is also observed.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:198:y:1993:i:3:p:655-665

DOI: 10.1016/0378-4371(93)90245-Y

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