Critical Properties of Mixed Ising Spin System with Different Trimodal Transverse Fields in the Presence of Single-Ion Anisotropy

• Published in: Communications in theoretical physics 2006-06, Vol.45 (6), p.1131-1136
• Main Authors: Qiang, Chen, Shi-Lei, Yan
• Format: Article
• Language: English
• Subjects: 三角形式横断场; 临界性; 单离子各向异性; 混合自旋系统
• ISSN: 0253-6102
• DOI: 10.1088/0253-6102/45/6/033

Within the framework of an effective field approximation, the effects of single-ion anisotropy and different trimodal transverse fields of two sublattices on the critical properties of the mixed spin-1/2 and spin-1 Ising system are investigated on the simple cubic lattice. A smaller single-lon anisotropy can magnify magnetic ordering phases and a larger one can depress magnetic ordering phase for T-Ω1/2 space at low temperatures, while a smaller single-ion anisotropy can hardly change the value of critical transverse field for T-Ω1 space. On the other hand, influences of two different trimodal transverse fields concentrations on tricritical points and magnetic ordering phases take on some interesting results in T-D space. The main reason comes from the common action of single-ion anisotropy, different transverse fields and two trimodal distributions.