Two distinct magnetic susceptibility peaks and magnetic reversal events in a cylindrical core/shell spin-1 Ising nanowire

被引：66
作者：
Sarli, Numan [1 ]
Keskin, Mustafa [1 ,2 ]
机构：
[1] Erciyes Univ, Inst Sci, TR-38039 Kayseri, Turkey
[2] Erciyes Univ, Dept Phys, TR-38039 Kayseri, Turkey
来源：
SOLID STATE COMMUNICATIONS | 2012年 / 152卷 / 05期
关键词：
Nanowires; Magnetic susceptibility; Phase transition; Effective-field theory; ROOM-TEMPERATURE FERROMAGNETISM; MONTE-CARLO-SIMULATION; CORE-SHELL NANOWIRES; OPTICAL-PROPERTIES; FIELD-STRENGTH; NANOPARTICLES; NANOTUBES; MODEL; HYSTERESIS; BEHAVIORS;
D O I：
10.1016/j.ssc.2011.12.015
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetization and susceptibility of a cylindrical core/shell spin-1 Ising nanowire are investigated within the effective-field theory with correlations for both ferromagnetic and antiferromagnetic exchange interactions between the shell and the core. We find that the nanowire system exhibits two distinct susceptibility peaks and two successive phase transitions; either both of them are second-order transitions or one is a second-order transition and the other is a first-order transition for a small exchange interaction. The susceptibility versus switching field and the hysteresis behavior are investigated for different temperatures. It is found that the magnetization reversal events appear as peaks in the susceptibility versus switching field curve, the positions of which define the coercive field points of the nanowire system; the distance between the two susceptibility peaks decreases with increasing temperature. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：354 / 359
页数：6
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