Mixed spin (1/2,1) transverse Ising nanoparticles

被引:28
|
作者
Mouhib, M. [1 ]
Benayad, N. [1 ]
Azhari, M. [1 ]
机构
[1] HASSAN II Univ Casablanca, Lab High Energy Phys & Condensed Matter, Fac Sci Ain Chock, BP 5366 Maarif, Casablanca 20100, Morocco
关键词
Mixed spin; Circle and square 2D-nanoparticle; Transverse Ising model; Finite cluster approximation; Phase diagrams; CRYSTAL-FIELD INTERACTIONS; MAGNETIC-PROPERTIES; THERMODYNAMICAL PROPERTIES; FERRIMAGNETIC SURFACE; COMPENSATION POINT; PHASE-DIAGRAMS; NANO-PARTICLES; THIN-FILMS; MODEL; NANOWIRES;
D O I
10.1016/j.jmmm.2016.06.022
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Mixed spin 2D-nanoparticles (circle and square) described by the transverse Ising model are investigated by the use of the finite cluster approximation. The effects of the exchange interactions and the transverse field parameters on the phase diagrams are systematically discussed, in particular, it was shown that the transition temperature is not so sensitive to shell exchange interaction, when the spins S are strongly correlated. A number of interesting phenomena have been found such as reentrant behavior. This latter, which is due to the competition between the exchange interaction and core-transverse field, disappears completely for any no-zero shell transverse field. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:325 / 337
页数:13
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