Thermal and magnetic properties of a nanotube with spin-1/2 core and spin-3/2 shell structure

被引:34
作者
Taskin, Ferhat [1 ]
Canko, Osman [1 ]
Erdinc, Ahmet [1 ,2 ]
Yildirim, Ali Fuat [1 ]
机构
[1] Erciyes Univ, Dept Phys, TR-38039 Kayseri, Turkey
[2] Erciyes Univ, Tomarza Mustafa Akincioglu Vocat Collage, TR-38039 Kayseri, Turkey
关键词
Nanomagnetic material; Nanotube; Ising model; Effective field theory; Metastable state; ISING FERRIMAGNETIC SYSTEM; PHASE-DIAGRAMS; MIXED SPIN-1/2; MONTE-CARLO; MODEL; BEHAVIOR; MAGNETIZATIONS;
D O I
10.1016/j.physa.2014.03.020
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The magnetic properties of a cylindrical Ising nanotube with a spin-1/2 core surrounded by a spin-3/2 shell system have been studied by means of the effective field theory (EFT). We have investigated the effects of crystal-field coupling at the surface shell and bilinear interactions among the core and surface shells to the order parameters, susceptibility, internal energy, specific heat, and free energy. Some characteristic phenomena are examined in terms of thermal or crystal-field variations when the other system parameters are fixed. Moreover, we have observed first-order and second-order transitions and critical end points in the (D/J, kT/J) plane, where D/J and kT/J are crystal-field and temperature, respectively. (c) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:287 / 294
页数:8
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