Magnetic step regions in α-Fe2O3 nanostructured ring arrays

被引：7
|
作者：
Li, Zhigang [1 ]
Cai, Weiping [1 ]
Duan, Guotao [1 ]
Liu, Peisheng [1 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Key Lab Mat Phys, Hefei 230031, Peoples R China
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 03期
基金：
中国国家自然科学基金;
关键词：
nanostructured ring array; step region in magnetic hysteresis loop; alpha-Fe2O3;
D O I：
10.1016/j.physe.2007.09.050
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
alpha-Fe2O3 nanostructured ring arrays with different ring sizes were fabricated by solution-dipping on a colloidal monolayer template. The magnetic properties of the arrays are investigated. An abnormal magnetic step region was observed in the hysteresis loop at room temperature, showing existence of a steady "Vortex" state in alpha-Fe2O3 ring arrays at room temperature. However, at a low temperature (50 K), the step region disappeared. Also, no step region is found from Fe ring array with the similar morphology to that of alpha-Fe2O3. This is attributed to the weak dependence of hysteresis loop on size and morphology of the single ring for alpha-Fe2O3 at room temperature. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：680 / 683
页数：4
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