Study on magnetic properties of a nano-graphene bilayer

被引：128
|
作者：
Jiang, Wei [1 ]
Yang, Ying-Ying [1 ]
Guo, An-Bang [1 ]
机构：
[1] Shenyang Univ Technol, Sch Sci, Shenyang 110870, Peoples R China
来源：
CARBON | 2015年 / 95卷
基金：
高等学校博士学科点专项科研基金;
关键词：
THERMODYNAMIC PROPERTIES; DILUTED SURFACE; CUBIC NANOWIRE; ISING NANOWIRE; CRYSTAL-FIELD; TRANSVERSE; NANOPARTICLE; TEMPERATURE;
D O I：
10.1016/j.carbon.2015.07.097
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A nano-graphene bilayer is described by a transverse Ising model with single-ion anisotropy. The upper layer consists of spin 3/2 with an antiferromagnetic exchange coupling, whereas the bottom layer composes of spin 5/2 with a ferromagnetic exchange coupling. Based on the effective-field theory with correlations the general formula for the magnetization is given. Magnetic properties of the system have been studied, such as the magnetization, the magnetic susceptibilities and the blocking temperature. The exchange coupling, the single-ion anisotropy, the transverse field and the external magnetic field have important effects on the blocking temperature. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：190 / 198
页数：9
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