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Tricritical behavior of mixed spin-2 and spin-5/2 ferrimagnetic Ising system with interlayer coupling

✍ Scribed by Guozhu Wei; Qi Zhang; Jie Zhao; Yongwei Gu

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
328 KB
Volume
381
Category
Article
ISSN
0921-4526

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✦ Synopsis

Tricritical points of layer Ising system consisting of mixed spin-2 and spin-5/2 ferrimagnetic honeycomb lattice layers which are coupled together with two kinds of positive interlayer coupling are examined by the use of the effective-field theory with correlations. In particular, the effects of interlayer coupling and crystal-field constants of the spin-2 ions and spin-5/2 ions on the tricritical points are investigated, in order to clarify the characteristic behavior of the first-order phase transitions and the second-order phase transitions of the system.

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Within the framework of the effective-field theory with correlations, the ferromagnetic spin-2 Ising model with a transverse crystal field on honeycomb, square and simple cubic lattices is studied. We have investigated the effect of the transverse crystal field on the phase diagrams, magnetization,